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ID	Title	Solved	Source
3690	Constellations	696	2008 Asia Hefei Regional Contest Online by USTC
3691	DNA repair	1939	2008 Asia Hefei Regional Contest Online by USTC
3692	Kindergarten	2616	2008 Asia Hefei Regional Contest Online by USTC
3693	Maximum repetition substring	1505	2008 Asia Hefei Regional Contest Online by USTC
3694	Network	1968	2008 Asia Hefei Regional Contest Online by USTC
3695	Rectangles	640	2008 Asia Hefei Regional Contest Online by USTC
3696	The Luckiest number	1238	2008 Asia Hefei Regional Contest Online by USTC
3697	USTC campus network	749	2008 Asia Hefei Regional Contest Online by USTC
3812	Block Game	39	2009 ACM ICPC Southeast USA Regional Programming Contest
3813	Euclid	160	2009 ACM ICPC Southeast USA Regional Programming Contest
3814	Museum Guards	164	2009 ACM ICPC Southeast USA Regional Programming Contest
3815	The Ninja Way	131	2009 ACM ICPC Southeast USA Regional Programming Contest
3816	Pool Table	46	2009 ACM ICPC Southeast USA Regional Programming Contest
3817	Robot Challenge	201	2009 ACM ICPC Southeast USA Regional Programming Contest
3818	Mosaic	92	2009 ACM ICPC Southeast USA Regional Programming Contest
3842	An Industrial Spy	391	2009 ACM North Western European Regional Contest
3843	Common Subexpression Elimination	32	2009 ACM North Western European Regional Contest
3844	Divisible Subsequences	550	2009 ACM North Western European Regional Contest
3845	Fractal	98	2009 ACM North Western European Regional Contest
3846	Mountain Road	102	2009 ACM North Western European Regional Contest
3847	Moving to Nuremberg	113	2009 ACM North Western European Regional Contest
3848	Room Assignments	33	2009 ACM North Western European Regional Contest
3849	Settlers of Catan	117	2009 ACM North Western European Regional Contest
3850	Simple Polygon	118	2009 ACM North Western European Regional Contest
3851	Wormholes	32	2009 ACM North Western European Regional Contest
3822	Cover Up	24	2009 East Central North America
3823	Decompressing in a GIF	45	2009 East Central North America
3824	Flipper	72	2009 East Central North America
3825	Here's a Product Which Will Make You Tensor	24	2009 East Central North America
3826	Trip the Lights Fantastic	31	2009 East Central North America
3937	Parlay Wagering	20	2009 Mid-Atlantic Regional Programming Contest
3939	Extended Manhattan Distance	12	2009 Mid-Atlantic Regional Programming Contest
3819	Coverage	82	2009 Rocky Mountain
3820	XML	157	2009 Rocky Mountain
3821	Clickomania	93	2009 Rocky Mountain
3873	Trick or Treat	136	2009 South Western European Regional Contest
3874	Working at the Restaurant	93	2009 South Western European Regional Contest
3875	Lights	57	2009 South Western European Regional Contest
3876	Darts	38	2009 South Western European Regional Contest
3877	Genetics	9	2009 South Western European Regional Contest
3878	Haunted Graveyard	100	2009 South Western European Regional Contest
3879	Slalom	40	2009 South Western European Regional Contest
3880	Routing	21	2009 South Western European Regional Contest
3881	Happy Telephones	154	2009 South Western European Regional Contest
3882	Stammering Aliens	169	2009 South Western European Regional Contest
3771	World Islands	132	2010 National Programming Invitational Contest Host by ZSTU
3772	Baseball of Planet Pandora	46	2010 National Programming Invitational Contest Host by ZSTU
3773	String-Matching Automata	70	2010 National Programming Invitational Contest Host by ZSTU
3774	Elune’s Arrow	79	2010 National Programming Invitational Contest Host by ZSTU
3775	Chase	45	2010 National Programming Invitational Contest Host by ZSTU
3776	Passing the Message	117	2010 National Programming Invitational Contest Host by ZSTU
3777	Snail Alice	51	2010 National Programming Invitational Contest Host by ZSTU
3778	An Odd Award Rule	122	2010 National Programming Invitational Contest Host by ZSTU
3779	Single CPU, multi-tasking	89	2010 National Programming Invitational Contest Host by ZSTU
3780	Tour Route	5	2010 National Programming Invitational Contest Host by ZSTU
2522	Partitioning for fun and profit	250	Alberta Collegiate Programming Contest 2003.10.18
2523	ASCII Labyrinth	86	Alberta Collegiate Programming Contest 2003.10.18
2524	Ubiquitous Religions	10511	Alberta Collegiate Programming Contest 2003.10.18
2525	Text Formalization	177	Alberta Collegiate Programming Contest 2003.10.18
2526	Center of symmetry	882	Alberta Collegiate Programming Contest 2003.10.18
2527	Polynomial Remains	690	Alberta Collegiate Programming Contest 2003.10.18
2528	Mayor's posters	8994	Alberta Collegiate Programming Contest 2003.10.18
2529	Queuing at the doctors	124	Alberta Collegiate Programming Contest 2003.10.18
3302	Subsequence	4445	Amirkabir University of Technology Local Contest 2006
3303	Halls	295	Amirkabir University of Technology Local Contest 2006
3304	Segments	2991	Amirkabir University of Technology Local Contest 2006
3305	Surveillance	68	Amirkabir University of Technology Local Contest 2006
3306	Busy Airport	129	Amirkabir University of Technology Local Contest 2006
3307	Smart Sister	709	Amirkabir University of Technology Local Contest 2006
3308	Paratroopers	1634	Amirkabir University of Technology Local Contest 2006
3309	Unlucky Luke!	99	Amirkabir University of Technology Local Contest 2006
3991	Seinfeld	428	anarc 2009
3992	Tiles of Tetris, NOT!	213	anarc 2009
3993	Not So Flat After All	174	anarc 2009
3994	Probability One	1152	anarc 2009
3995	Hop — Don’t Walk!	88	anarc 2009
3996	Air Strike	140	anarc 2009
3997	Stock Chase	152	anarc 2009
3998	Land Division	71	anarc 2009
3999	Kind of a Blur	119	anarc 2009
4000	National Treasures	162	anarc 2009
3507	Judging Olympia	3431	Arab and North Africa 2007
3508	Hide That Number	1130	Arab and North Africa 2007
3509	Rotating Rings	492	Arab and North Africa 2007
3510	A Tale from the Dark Side of the Moon	582	Arab and North Africa 2007
3511	Fermat's Christmas Theorem	1225	Arab and North Africa 2007
3512	Incidental Points	600	Arab and North Africa 2007
3513	Let's Go to the Movies	270	Arab and North Africa 2007
3514	The Writers' Club	96	Arab and North Africa 2007
3515	Moving Sticks	45	Arab and North Africa 2007
3516	Johnny Hates Math	170	Arab and North Africa 2007
1770	Special Experiment	521	Asia Guangzhou 2003
1771	Elevator Stopping Plan	425	Asia Guangzhou 2003
1772	New Go Game	93	Asia Guangzhou 2003
1773	Outernet	57	Asia Guangzhou 2003
1774	Fold Paper Strips	86	Asia Guangzhou 2003
1775	Sum of Factorials	3469	Asia Guangzhou 2003
1776	Task Sequences	484	Asia Guangzhou 2003
1777	Vivian's Problem	259	Asia Guangzhou 2003
1609	Tiling Up Blocks	1754	Asia Kaohsiung 2003
1610	Quad Trees	431	Asia Kaohsiung 2003
1611	The Suspects	11644	Asia Kaohsiung 2003
1612	The Geodetic Set Problem	207	Asia Kaohsiung 2003
1613	Cave Raider	251	Asia Kaohsiung 2003
1614	Space AI Bombs	55	Asia Kaohsiung 2003
1615	Merging Sequences Problem	71	Asia Kaohsiung 2003
1616	Harmonic Periods	97	Asia Kaohsiung 2003
3940	Grey Area	127	Asia Regional Contest, Aizu, 2008
3941	Expected Allowance	111	Asia Regional Contest, Aizu, 2008
3942	Stopped Watches	53	Asia Regional Contest, Aizu, 2008
3943	Digits on the Floor	36	Asia Regional Contest, Aizu, 2008
3944	Spherical Mirrors	54	Asia Regional Contest, Aizu, 2008
3945	Traveling Cube	42	Asia Regional Contest, Aizu, 2008
3946	Search of Concatenated Strings	48	Asia Regional Contest, Aizu, 2008
3947	Top Spinning	18	Asia Regional Contest, Aizu, 2008
3948	Common Polynomial	21	Asia Regional Contest, Aizu, 2008
3949	Zigzag	17	Asia Regional Contest, Aizu, 2008
2912	Rochambeau	989	Baidu Star 2006 Preliminary Chen, Shixi (xreborner) living in http://fairyair.yeah.net/
2915	Zuma	88	Baidu Star 2006 Semifinal Chen, Shixi (xreborner) living in http://fairyair.yeah.net/
2916	The Wolves and the Sheep Plus	20	Baidu Star 2006 Semifinal Chen, Shixi (xreborner) living in http://fairyair.yeah.net/
2913	Fly Monkey	59	Baidu Star 2006 Semifinal Liu, Rujia (Originator) Chen, Shixi (Solution and test cases)
2914	Minimum Cut	2525	Baidu Star 2006 Semifinal Wang, Ying (Originator) Chen, Shixi (Test cases)
3455	Cheesy Chess	138	BAPC 2006 Qualification
3456	Frobenius	410	BAPC 2006 Qualification
3457	Mineshaft	10	BAPC 2006 Qualification
3458	Colour Sequence	722	BAPC 2006 Qualification
3459	Projects	300	BAPC 2006 Qualification
3460	Booksort	669	BAPC 2006 Qualification
3461	Oulipo	10375	BAPC 2006 Qualification
3462	Lucky Light	317	BAPC 2006 Qualification
3463	Sightseeing	2404	BAPC 2006 Qualification
1322	Chocolate	1775	Beijing 2002
1323	Game Prediction	4324	Beijing 2002
1324	Holedox Moving	2125	Beijing 2002
1325	Machine Schedule	5403	Beijing 2002
1326	Mileage Bank	5166	Beijing 2002
1327	Moving Object Recognition	219	Beijing 2002
1328	Radar Installation	18419	Beijing 2002
1462	Random Walk	106	Beijing 2002
2049	Finding Nemo	2651	Beijing 2004
2050	Searching the Web	287	Beijing 2004
2051	Argus	3622	Beijing 2004
2052	Fun Game	190	Beijing 2004
2053	Square	180	Beijing 2004
2054	Color a Tree	1969	Beijing 2004
2055	Kid's Problem	133	Beijing 2004
2056	The Separator in Grid	653	Beijing 2004
2057	The Lost House	904	Beijing 2004
1921	Paper Cut	53	Beijing 2004 Preliminary@POJ
1922	Ride to School	6835	Beijing 2004 Preliminary@POJ
1923	Fourier's Lines	638	Beijing 2004 Preliminary@POJ
1924	The Treasure	287	Beijing 2004 Preliminary@POJ
1925	Spiderman	980	Beijing 2004 Preliminary@POJ
1926	Pollution	873	Beijing 2004 Preliminary@POJ
1927	Area in Triangle	732	Beijing 2004 Preliminary@POJ
1928	The Peanuts	2743	Beijing 2004 Preliminary@POJ
2722	Angle and Squares	722	Beijing 2005
2723	Get Luffy Out	2035	Beijing 2005
2724	Purifying Machine	1072	Beijing 2005
2725	Finding Treasure	201	Beijing 2005
2726	Holiday Hotel	2597	Beijing 2005
2727	Special Judge	80	Beijing 2005
2728	Desert King	3615	Beijing 2005
2729	Robocode	195	Beijing 2005
2730	F1 Circuit Design	40	Beijing 2005
2668	Defending Castle	837	Beijing 2005 Preliminary Author:nealzane
2665	Trees	6215	Beijing 2005 Preliminary
2666	Back to Mother Ship	715	Beijing 2005 Preliminary
2667	Barber's problem	93	Beijing 2005 Preliminary
2669	Explore the Pirate's Cave	144	Beijing 2005 Preliminary
2670	The Sorcerer's Stone	221	Beijing 2005 Preliminary
2671	Jimmy's Bad Day	343	Beijing 2005 Preliminary
2672	Hotkeys	173	Beijing 2005 Preliminary
2673	Kicc Wants to Move a Mountain!	1042	Beijing 2005 Preliminary
3921	Destroying the bus stations	424	Beijing 2008
3922	A simple stone game	257	Beijing 2008
3923	Ugly Windows	408	Beijing 2008
3924	Tornado	68	Beijing 2008
3925	Minimal Ratio Tree	383	Beijing 2008
3926	Parade	188	Beijing 2008
3927	Priest John's Busiest Day	196	Beijing 2008
3928	Ping pong	871	Beijing 2008
3929	Timer	71	Beijing 2008
3930	Elevator	50	Beijing 2008
1008	Maya Calendar	21498	Central Europe 1995
1011	Sticks	19631	Central Europe 1995
1012	Joseph	17441	Central Europe 1995
1025	Department	481	Central Europe 1995
1026	Cipher	4472	Central Europe 1995
1039	Pipe	2383	Central Europe 1995
1040	Transportation	1505	Central Europe 1995
1041	John's trip	2203	Central Europe 1995
1017	Packets	16364	Central Europe 1996
1144	Network	4744	Central Europe 1996
1371	Tin Cutter	209	Central Europe 1996
1372	FORCAL	70	Central Europe 1996
1373	L-system	85	Central Europe 1996
1374	Crosswords	152	Central Europe 1996
1375	Intervals	947	Central Europe 1996
1376	Robot	2065	Central Europe 1996
1363	Rails	9817	Central Europe 1997
1364	King	2989	Central Europe 1997
1365	Prime Land	1429	Central Europe 1997
1366	Word	201	Central Europe 1997
1367	Time	162	Central Europe 1997
1368	Puzzle	114	Central Europe 1997
1369	Append	93	Central Europe 1997
1370	Gossiping	170	Central Europe 1997
1504	Adding Reversed Numbers	8331	Central Europe 1998
1505	Copying Books	1908	Central Europe 1998
1506	Substitution Cipher	131	Central Europe 1998
1507	Commedia dell' arte	143	Central Europe 1998
1508	Skyscraper Floors	112	Central Europe 1998
1509	Glass Beads	1881	Central Europe 1998
1510	Hares and Foxes	44	Central Europe 1998
1511	Invitation Cards	4484	Central Europe 1998
1379	Run Away	1121	Central Europe 1999
1380	Equipment Box	747	Central Europe 1999
1381	Secret Code	177	Central Europe 1999
1382	The Proper Key	146	Central Europe 1999
1383	Labyrinth	1128	Central Europe 1999
1384	Piggy-Bank	5196	Central Europe 1999
1385	Lifting the Stone	799	Central Europe 1999
1386	Play on Words	2937	Central Europe 1999
1396	Simple Arithmetics	392	Central Europe 2000
1397	The Bulk	76	Central Europe 2000
1398	Complete the sequence!	407	Central Europe 2000
1399	Direct Visibility	90	Central Europe 2000
1400	Complicated Expressions	430	Central Europe 2000
1401	Factorial	8228	Central Europe 2000
1402	The Game of Master-Mind	83	Central Europe 2000
1403	Hotline	94	Central Europe 2000
1404	I-Keyboard	780	Central Europe 2000
1429	Alice and Bob	191	Central Europe 2001
1430	Binary Stirling Numbers	631	Central Europe 2001
1431	Calendar of Maya	85	Central Europe 2001
1432	Decoding Morse Sequences	473	Central Europe 2001
1433	Exchanges	172	Central Europe 2001
1434	Fill the Cisterns!	759	Central Europe 2001
1435	Gates	92	Central Europe 2001
1436	Horizontally Visible Segments	955	Central Europe 2001
1438	One-way Traffic	198	Central Europe 2002
1439	Rhombs	55	Central Europe 2002
1440	Varacious Steve	182	Central Europe 2002
1761	Easy Task	387	Central Europe 2003
1762	Bundling	34	Central Europe 2003
1763	Shortcut	412	Central Europe 2003
1764	Dice Contest	77	Central Europe 2003
1765	November Rain	324	Central Europe 2003
1766	Football	55	Central Europe 2003
1767	Which is Next	137	Central Europe 2003
1768	Hang or not to hang	147	Central Europe 2003
1769	Minimizing maximizer	1389	Central Europe 2003
2942	Knights of the Round Table	2294	Central Europe 2005
2943	The Cow Doctor	446	Central Europe 2005
2944	Wild West	206	Central Europe 2005
2945	Find the Clones	2122	Central Europe 2005
2946	The Warehouse	246	Central Europe 2005
2947	Widget Factory	1278	Central Europe 2005
2948	Martian Mining	1334	Central Europe 2005
2949	Word Rings	735	Central Europe 2005
2950	Nuclear Plants	23	Central Europe 2005
1149	PIGS	5630	Croatia OI 2002 Final Exam - First day
1153	SAFE	205	Croatia OI 2002 Final Exam - First day
1155	TELE	1749	Croatia OI 2002 Final Exam - Second Day
2657	Comfort	805	Croatia OI 2002 National – Juniors
2659	Bomb Game	584	Croatia OI 2002 National – Juniors
1849	Two	702	Croatia OI 2002 national – second day, seniors
1847	Tram	3636	Croatia OI 2002 Regional - Juniors
1154	LETTERS	2581	Croatia OI 2002 Regional Competition - Juniors
2658	Song	418	Croatia OI 2002 Regional – Juniors
1992	Jack	894	CTU Open 1999
1993	Caleidoscope	254	CTU Open 1999
1994	Logic	16	CTU Open 1999
1995	Raising Modulo Numbers	6334	CTU Open 1999
1996	The Highest Profits	255	CTU Open 1999
1997	Word Puzzle	117	CTU Open 1999
1998	Lloyd Fifteen Puzzle	195	CTU Open 1999
1999	Quorf	87	CTU Open 1999
1856	Sea Battle	759	CTU Open 2002
1858	Interesting Maze Game	82	CTU Open 2002
1859	The Perfect Symmetry	396	CTU Open 2002
1786	Bridge Hands	720	CTU Open 2003
1787	Charlie's Change	952	CTU Open 2003
1788	Building a New Depot	768	CTU Open 2003
1789	Truck History	7891	CTU Open 2003
1790	Base Numbers	230	CTU Open 2003
1791	Paper Cutting	370	CTU Open 2003
1792	Hexagonal Routes	159	CTU Open 2003
1793	Storehouse	74	CTU Open 2003
2113	Agents	78	CTU Open 2004
2114	Boatherds	605	CTU Open 2004
2115	C Looooops	5101	CTU Open 2004
2116	Death to Binary?	496	CTU Open 2004
2117	Electricity	1190	CTU Open 2004
2118	Firepersons	333	CTU Open 2004
2119	God of the Vile Baskers	110	CTU Open 2004
2120	Herbalists	31	CTU Open 2004
2122	Japan Plotter Driver	246	CTU Open 2004
2121	Inglish-Number Translator	2403	CTU Open 2004,UVA 486
2989	All Friends	495	CTU Open 2005
2990	Board Game	58	CTU Open 2005
2991	Crane	1292	CTU Open 2005
2992	Divisors	1982	CTU Open 2005
2993	Emag eht htiw Em Pleh	2198	CTU Open 2005
2994	Failing Roads	168	CTU Open 2005
2995	Go Endgame	79	CTU Open 2005
2996	Help Me with the Game	2666	CTU Open 2005
2997	IVXLCDM	177	CTU Open 2005
3446	Catch the Bus!	51	CTU Open 2007
3447	Calendar of Events	75	CTU Open 2007
3448	Roman Expressions	217	CTU Open 2007
3449	Geometric Shapes	531	CTU Open 2007
3450	Corporate Identity	1539	CTU Open 2007
3451	Money Money Money, Must Be Funny	108	CTU Open 2007
3452	Railway Transportation	332	CTU Open 2007
3453	Soccer Tournament	142	CTU Open 2007
3454	Hypertheseus	129	CTU Open 2007
1857	To Europe! To Europe!	317	ČVUT FEL++ 2003,Original From Asia 1999
1207	The 3n + 1 problem	15272	Duke Internet Programming Contest 1990,uva 100
1208	The Blocks Problem	3385	Duke Internet Programming Contest 1990,uva 101
1238	Arbitrage	196	Duke Internet Programming Contest 1990,uva 104
1305	Fermat vs. Pythagoras	811	Duke Internet Programming Contest 1991,UVA 106
1289	The Cat in the Hat	495	Duke Internet Programming Contest 1991,UVA 107
1264	SCUD Busters	305	Duke Internet Programming Contest 1991,UVA 109
1145	Tree Summing	1295	Duke Internet Programming Contest 1992,UVA 112
1216	Simulation Wizardry	168	Duke Internet Programming Contest 1992,UVA 114
1237	The Postal Worker Rings Once	417	Duke Internet Programming Contest 1992,UVA 117
1319	Pipe Fitters	672	Duke Internet Programming Contest 1993,UVA 121
1270	Following Orders	1935	Duke Internet Programming Contest 1993,uva 124
1001	Exponentiation	35160	East Central North America 1988
1118	Lining Up	5283	East Central North America 1994
1126	Simply Syntax	2096	East Central North America 1994
1127	Jack Straws	1624	East Central North America 1994
1139	Cat and Mouse	297	East Central North America 1994
1140	Expanding Fractions	1186	East Central North America 1994
1488	TEX Quotes	4486	East Central North America 1994
1489	Egyptian Multiplication	235	East Central North America 1994
1490	Cabinets	55	East Central North America 1994
1491	Pi	2518	East Central North America 1995
1492	Up and Down Sequences	416	East Central North America 1995
1493	Machined Surfaces	2030	East Central North America 1995
1494	Sunrise	120	East Central North America 1995
1495	LED Test	162	East Central North America 1995
1496	Word Index	2606	East Central North America 1995
1497	Molecules	95	East Central North America 1995
1498	Matching Meetings	35	East Central North America 1996
1499	Supercomputer Selection, The Sequel	37	East Central North America 1996
1500	Polygonal Puzzle	28	East Central North America 1996
1501	Word-Search Wonder	476	East Central North America 1996
1502	MPI Maelstrom	4444	East Central North America 1996
1503	Integer Inquiry	10464	East Central North America 1996
1007	DNA Sorting	35277	East Central North America 1998
1013	Counterfeit Dollar	13807	East Central North America 1998
1016	Numbers That Count	6376	East Central North America 1998
1512	Keeps Going and Going and ...	52	East Central North America 1998
1513	Scheduling Lectures	388	East Central North America 1998
1514	Metal Cutting	137	East Central North America 1998
1515	Street Directions	441	East Central North America 1998
1516	Parallel Deadlock	40	East Central North America 1998
1002	487-3279	32763	East Central North America 1999
1006	Biorhythms	35218	East Central North America 1999
1027	The Same Game	1958	East Central North America 1999
1042	Gone Fishing	11280	East Central North America 1999
1066	Treasure Hunt	2151	East Central North America 1999
1085	Triangle War	825	East Central North America 1999
1086	Unscrambling Images	297	East Central North America 1999
1087	A Plug for UNIX	3893	East Central North America 1999
1639	Picnic Planning	2101	East Central North America 2000
1640	Poly-polygonal Numbers	135	East Central North America 2000
1641	Rational Approximation	49	East Central North America 2000
1642	Stacking Cubes	465	East Central North America 2000
1643	Checker's Check	50	East Central North America 2000
1644	To Bet or Not To Bet	448	East Central North America 2000
1645	BSP Trees	87	East Central North America 2000
1646	Double Trouble	175	East Central North America 2000
1028	Web Navigation	13323	East Central North America 2001
1043	What's In A Name?	857	East Central North America 2001
1094	Sorting It All Out	8990	East Central North America 2001
1095	Trees Made to Order	3408	East Central North America 2001
1096	Space Station Shielding	486	East Central North America 2001
1097	Roads Scholar	285	East Central North America 2001
1098	Robots	174	East Central North America 2001
1099	Square Ice	1497	East Central North America 2001
1234	Ball Toss	507	East Central North America 2002
1235	Galactic Breakup	105	East Central North America 2002
1239	Increasing Sequences	854	East Central North America 2002
1240	Pre-Post-erous!	1118	East Central North America 2002
1241	Knockout Tournament	503	East Central North America 2002
1242	Plugged In	173	East Central North America 2002
1243	One Person	1516	East Central North America 2002
1244	Slots of Fun	661	East Central North America 2002
1617	Crypto Columns	1579	East Central North America 2003
1618	Decorations	359	East Central North America 2003
1619	EKG Sequence	261	East Central North America 2003
1620	Phone Home	367	East Central North America 2003
1621	Polly Nomials	247	East Central North America 2003
1622	Pushing Boxes	198	East Central North America 2003
1623	Squadtrees	166	East Central North America 2003
1624	This Takes the Cake	365	East Central North America 2003
2033	Alphacode	3412	East Central North America 2004
2034	Anti-prime Sequences	1136	East Central North America 2004
2035	Hit or Miss	176	East Central North America 2004
2036	I Conduit!	256	East Central North America 2004
2037	Roll Playing Games	72	East Central North America 2004
2038	Team Rankings	1005	East Central North America 2004
2039	To and Fro	5620	East Central North America 2004
2040	Translations	142	East Central North America 2004
2731	ACM(ACronymMaker)	112	East Central North America 2005
2732	Countdown	347	East Central North America 2005
2733	The Game of Efil	185	East Central North America 2005
2734	Queens, Knights and Pawns	835	East Central North America 2005
2735	Reliable Nets	272	East Central North America 2005
2736	Square Count	199	East Central North America 2005
2737	Swamp Things	347	East Central North America 2005
2738	Two Ends	1017	East Central North America 2005
3310	Caterpillar	978	East Central North America 2006
3311	Hie with the Pie	3146	East Central North America 2006
3312	Mahershalalhashbaz, Nebuchadnezzar, and Billy Bob Benjamin Go to the Regionals	872	East Central North America 2006
3313	The Mastermind Master's Mind	86	East Central North America 2006
3314	Plaque Pack	416	East Central North America 2006
3315	Roofing It	95	East Central North America 2006
3316	Snakes on a Plane	420	East Central North America 2006
3317	Stake Your Claim	314	East Central North America 2006
1517	u Calculate e	9726	Greater New York 2000
1518	Problem Bee	151	Greater New York 2000
1519	Digital Roots	7496	Greater New York 2000
1520	Scramble Sort	1076	Greater New York 2000
1521	Entropy	4429	Greater New York 2000
1522	N-Credible Mazes	284	Greater New York 2000
1523	SPF	3030	Greater New York 2000
1911	A Well-Formed Problem	79	Greater New York 2000
1045	Bode Plot	8878	Greater New York 2001
1046	Color Me Less	15075	Greater New York 2001
1047	Round and Round We Go	5491	Greater New York 2001
1048	Follow My Logic	581	Greater New York 2001
1049	Microprocessor Simulation	781	Greater New York 2001
1050	To the Max	22373	Greater New York 2001
1051	P,MTHBGWB	4490	Greater New York 2001
1052	Plato's Blocks	355	Greater New York 2001
1053	Set Me	1342	Greater New York 2001
1217	FOUR QUARTERS	441	Greater New York 2002
1218	THE DRUNK JAILER	14314	Greater New York 2002
1219	L-I-N-G-O: LINGO	238	Greater New York 2002
1220	NUMBER BASE CONVERSION	2007	Greater New York 2002
1221	UNIMODAL PALINDROMIC DECOMPOSITIONS	2151	Greater New York 2002
1222	EXTENDED LIGHTS OUT	6223	Greater New York 2002
1223	DEHUFF	76	Greater New York 2002
1224	PICTURE PUZZLE	71	Greater New York 2002
1225	STRICTLY INSCRIBED SIMILAR TRIANGLES	29	Greater New York 2002
1665	Biker's Trip Odometer	3265	Greater New York 2003
1666	Candy Sharing Game	2347	Greater New York 2003
1667	Peg Game	130	Greater New York 2003
1668	Taxation With Representation Overdone	56	Greater New York 2003
1669	It's Logical	140	Greater New York 2003
1670	Obstructed Rook Circuits	44	Greater New York 2003
1671	Rhyme Schemes	834	Greater New York 2003
1672	Fully Diversified Sequences of Sets	184	Greater New York 2003
1673	EXOCENTER OF A TRIANGLE	1003	Greater New York 2003
2272	Bullseye	1923	Greater New York 2004
2273	An Excel-lent Problem	977	Greater New York 2004
2275	Flipping Pancake	573	Greater New York 2004
2276	Model Rocket Height	346	Greater New York 2004
2277	Region Filling	52	Greater New York 2004
2278	Histology Assistant	44	Greater New York 2004
2279	Mr. Young's Picture Permutations	994	Greater New York 2004
2845	01000001	2851	Greater New York 2005
2846	The Bank of Kalii	512	Greater New York 2005
2847	The Cubic End	453	Greater New York 2005
2848	Kindergarten Graduation	197	Greater New York 2005
2849	brainf*ck	390	Greater New York 2005
2850	Stacking Cylinders	515	Greater New York 2005
2851	No Fold'em Hold'em	35	Greater New York 2005
2852	Model Rocket Height	86	Greater New York 2005
2853	Sequence Sum Possibilities	3340	Greater New York 2005
3085	Quick Change	3992	Greater New York 2006
3086	Triangular Sums	4626	Greater New York 2006
3087	Shuffle'm Up	3843	Greater New York 2006
3088	Push Botton Lock	798	Greater New York 2006
3089	Sign Message Formatting	20	Greater New York 2006
3090	Visible Lattice Points	3582	Greater New York 2006
3091	Triangular N-Queens Problem	311	Greater New York 2006
3092	Non-divisible 2-3 Power Sums	395	Greater New York 2006
3093	Margaritas on the River Walk	795	Greater New York 2006
3796	Spatial Concepts Test	25	Greater New York Regional 2007
3797	Tiling a Grid With Dominoes	306	Greater New York Regional 2007
3789	Binary Clock	347	Greater New York Regional 2008
3790	Recursively Palindromic Partitions	336	Greater New York Regional 2008
3791	Text Messaging Improvement?	79	Greater New York Regional 2008
3792	Area of Polycubes	121	Greater New York Regional 2008
3793	Joe’s Triangular Gardens	35	Greater New York Regional 2008
3794	Extended Normal Order Sort	91	Greater New York Regional 2008
3795	The Two Note Rag	125	Greater New York Regional 2008
3781	Nth Largest Value	1019	Greater New York Regional 2009
3782	Equal Sum Partitions	524	Greater New York Regional 2009
3783	Balls	1116	Greater New York Regional 2009
3784	Running Median	1342	Greater New York Regional 2009
3785	The Next Permutation	662	Greater New York Regional 2009
3786	Adjacent Bit Counts	374	Greater New York Regional 2009
3787	Convex Hull of Lattice Points	215	Greater New York Regional 2009
3788	Interior Points of Lattice Polygons	113	Greater New York Regional 2009
1091	跳蚤	2524	HNOI 2001
2859	A rectangle	285	Hooyeon Lee (ltdtl@POJ)
2860	Block game with the Little Prince	1148	Hooyeon Lee (ltdtl@POJ)
2861	Cycle with 6 vertices	83	Hooyeon Lee (ltdtl@POJ)
1406	Starship Hakodate-maru	843	Japan 2001
1407	e-Market	135	Japan 2001
1408	Fishnet	1236	Japan 2001
1409	77377	317	Japan 2001
1957	Beehives	100	Japan 2001
2067	Young, Poor and Busy	85	Japan 2001
2068	Nim	921	Japan 2001
2069	Super Star	865	Japan 2001
1411	Calling Extraterrestrial Intelligence Again	2198	Japan 2002 Kanazawa
1412	Equals are Equals	64	Japan 2002 Kanazawa
1413	GIGA Universe Cup	56	Japan 2002 Kanazawa
1414	Life Line	680	Japan 2002 Kanazawa
1415	Map of Ninja House	160	Japan 2002 Kanazawa
1416	Shredding Company	2985	Japan 2002 Kanazawa
1417	True Liars	1163	Japan 2002 Kanazawa
1418	Viva Confetti	298	Japan 2002 Kanazawa
2028	When Can We Meet?	2684	Japan 2003 Domestic
2029	Get Many Persimmon Trees	2381	Japan 2003 Domestic
2030	The Secret Number	620	Japan 2003 Domestic
2031	Building a Space Station	3189	Japan 2003 Domestic
2032	Square Carpets	193	Japan 2003 Domestic
2041	Unreliable Message	1118	Japan 2003,Aizu
2042	Lagrange's Four-Square Theorem	980	Japan 2003,Aizu
2043	Area of Polygons	257	Japan 2003,Aizu
2044	Weather Forecast	575	Japan 2003,Aizu
2045	Molecular Formula	387	Japan 2003,Aizu
2046	Gap	485	Japan 2003,Aizu
2047	Concert Hall Scheduling	462	Japan 2003,Aizu
2048	Monster Trap	146	Japan 2003,Aizu
2142	The Balance	2425	Japan 2004
2143	Make a Sequence	280	Japan 2004
2144	Leaky Cryptography	299	Japan 2004
2145	Pathological Paths	142	Japan 2004
2146	Confusing Login Names	272	Japan 2004
2147	Dice Puzzle	88	Japan 2004
2148	Color the Map	191	Japan 2004
2149	Inherit the Spheres	113	Japan 2004
2150	Crossing Prisms	49	Japan 2004
1978	Hanafuda Shuffle	2005	Japan 2004 Domestic
1979	Red and Black	16800	Japan 2004 Domestic
1980	Unit Fraction Partition	1085	Japan 2004 Domestic
1981	Circle and Points	1404	Japan 2004 Domestic
1982	Water Tank	77	Japan 2004 Domestic
1983	Name the Crossing	96	Japan 2004 Domestic
2739	Sum of Consecutive Prime Numbers	10631	Japan 2005
2740	Book Replacement	305	Japan 2005
2741	Colored Cubes	289	Japan 2005
2742	Organize Your Train	90	Japan 2005
2743	Mobile Computing	166	Japan 2005
2744	Atomic Car Race	479	Japan 2005
2745	Network Mess	185	Japan 2005
2746	Bingo	73	Japan 2005
2747	Shy Polygons	38	Japan 2005
2683	Ohgas' Fortune	621	Japan 2005 Domestic
2684	Polygonal Line Search	613	Japan 2005 Domestic
2685	Numeral System	1583	Japan 2005 Domestic
2686	Traveling by Stagecoach	1349	Japan 2005 Domestic
2687	Earth Observation with a Mobile Robot Team	48	Japan 2005 Domestic
2688	Cleaning Robot	1175	Japan 2005 Domestic
3129	How I Wonder What You Are!	692	Japan 2006
3130	How I Mathematician Wonder What You Are!	1393	Japan 2006
3131	Cubic Eight-Puzzle	266	Japan 2006
3132	Sum of Different Primes	1648	Japan 2006
3133	Manhattan Wiring	603	Japan 2006
3134	Power Calculus	1055	Japan 2006
3135	Polygons on the Grid	106	Japan 2006
3136	The Best Name for Your Baby	62	Japan 2006
3137	Enjoyable Commutation	124	Japan 2006
3006	Dirichlet's Theorem on Arithmetic Progressions	7486	Japan 2006 Domestic
3007	Organize Your Train part II	1601	Japan 2006 Domestic
3008	Hexerpents of Hexwamp	43	Japan 2006 Domestic
3009	Curling 2.0	7980	Japan 2006 Domestic
3010	The Genome Database of All Space Life	185	Japan 2006 Domestic
3011	Secrets in Shadows	44	Japan 2006 Domestic
3517	And Then There Was One	2359	Japan 2007
3518	Prime Gap	4408	Japan 2007
3519	Minimal Backgammon	582	Japan 2007
3520	Lowest Pyramid	49	Japan 2007
3521	Geometric Map	129	Japan 2007
3522	Slim Span	2939	Japan 2007
3523	The Morning after Halloween	357	Japan 2007
3524	Bug Hunt	298	Japan 2007
3525	Most Distant Point from the Sea	1371	Japan 2007
3526	The Teacher’s Side of Math	142	Japan 2007
3325	ICPC Score Totalizer Software	4301	Japan 2007 Domestic
3326	Analyzing Login/Logout Records	636	Japan 2007 Domestic
3327	Cut the Cake	534	Japan 2007 Domestic
3328	Cliff Climbing	547	Japan 2007 Domestic
3329	Twirl Around	35	Japan 2007 Domestic
3330	Dr. Podboq or: How We Became Asymmetric	85	Japan 2007 Domestic
1345	Address Recovery	7	kanpur 2002
1346	Board of Directors Meeting	17	kanpur 2002
3390	Print Words in Lines	735	Kaohsiung 2006
3391	The Bug Sensor Problem	61	Kaohsiung 2006
3392	Pitcher Rotation	114	Kaohsiung 2006
3393	Lucky and Good Months by Gregorian Calendar	573	Kaohsiung 2006
3394	Route Planning	254	Kaohsiung 2006
3395	Shift Cipher	83	Kaohsiung 2006
3396	A Scheduling Problem	63	Kaohsiung 2006
3397	Click the Lines	45	Kaohsiung 2006
3398	Perfect Service	740	Kaohsiung 2006
1829	火力防御网	56	LIANGLIANG@POJ
1830	开关问题	2647	LIANGLIANG@POJ
1737	Connected Graph	1462	LouTiancheng@POJ
1738	An old Stone Game	651	LouTiancheng@POJ
1739	Tony's Tour	893	LouTiancheng@POJ
1740	A New Stone Game	2877	LouTiancheng@POJ
1741	Tree	4925	LouTiancheng@POJ
1742	Coins	7371	LouTiancheng@POJ
1743	Musical Theme	4465	LouTiancheng@POJ
1744	Elevator Stopping Plan	604	LouTiancheng@POJ
3353	Nuevo-Romano	24	Manila 2006
3354	Connect the Dots	14	Manila 2006
3355	Boundary Points	272	Manila 2006
3356	AGTC	3236	Manila 2006
3357	Oreon	414	Manila 2006
3358	Period of an Infinite Binary Expansion	619	Manila 2006
3359	Wordfish	429	Manila 2006
3360	Take a Walk	259	Manila 2006
3361	Gaussian Prime Factors	349	Manila 2006
3362	20-Four	12	Manila 2006
2105	IP Address	9896	México and Central America 2004
2106	Boolean Expressions	1364	México and Central America 2004
2107	Gear Profiles	75	México and Central America 2004
2108	Lazy Pianist	191	México and Central America 2004
2109	Power of Cryptography	10324	México and Central America 2004
1269	Intersecting Lines	4700	Mid-Atlantic 1996
1524	Cowculations	174	Mid-Atlantic 1996
1525	Hi-Q	146	Mid-Atlantic 1996
1526	Call Forwarding	114	Mid-Atlantic 1996
1527	Making the Grade	124	Mid-Atlantic 1996
1528	Perfection	5373	Mid-Atlantic 1996
1529	Shipping Routes	214	Mid-Atlantic 1996
1530	Slurpys	226	Mid-Atlantic 1996
1004	Financial Management	66439	Mid-Atlantic 2001
1005	I Think I Need a Houseboat	44940	Mid-Atlantic 2001
1119	Start Up the Startup	474	Mid-Atlantic 2001
1120	A New Growth Industry	1187	Mid-Atlantic 2001
1121	Algernon's Noxious Emissions	157	Mid-Atlantic 2001
1122	FDNY to the Rescue!	770	Mid-Atlantic 2001
1123	For the Porsche	123	Mid-Atlantic 2001
1124	Oh, Those Achin' Feet	125	Mid-Atlantic 2001
2871	A Simple Question of Chemistry	4357	Mid-Atlantic 2002
2872	Spelling Be	617	Mid-Atlantic 2002
2873	Apply a Cold Compress	128	Mid-Atlantic 2002
2874	A Baron Landscape	82	Mid-Atlantic 2002
2875	In Defence of a Garden	180	Mid-Atlantic 2002
2876	Cantoring Along	1734	Mid-Atlantic 2002
2877	Chambers Ceramic Conundrum	74	Mid-Atlantic 2002
1581	A Contesting Decision	1944	Mid-Atlantic 2003
1582	Which Way Do I Go?	66	Mid-Atlantic 2003
1583	Choose Your Words Carefully	451	Mid-Atlantic 2003
1584	A Round Peg in a Ground Hole	1441	Mid-Atlantic 2003
1585	Helping Florida	97	Mid-Atlantic 2003
1586	Three Sides Make a Triangle	494	Mid-Atlantic 2003
1587	High and Dry	26	Mid-Atlantic 2003
1588	Reverse Roman Notation	219	Mid-Atlantic 2003
2070	Filling Out the Team	5131	Mid-Atlantic 2004
2071	Auctions R Us	125	Mid-Atlantic 2004
2072	GHOST	34	Mid-Atlantic 2004
2073	Doggone Moles	98	Mid-Atlantic 2004
2074	Line of Sight	1029	Mid-Atlantic 2004
2075	Tangled in Cables	1889	Mid-Atlantic 2004
2076	All Roads Lead to Albuquerque, er, Rome	46	Mid-Atlantic 2004
2077	Balanced Budget Initiative	40	Mid-Atlantic 2004
2810	Take Your Vitamins	729	Mid-Atlantic 2005
2811	Packing Dominoes	42	Mid-Atlantic 2005
2812	Extrusion	802	Mid-Atlantic 2005
2813	Pasting Strings	124	Mid-Atlantic 2005
2814	Mobiles	54	Mid-Atlantic 2005
2815	Context-Free Clock	330	Mid-Atlantic 2005
2816	Right-Hand Rule	123	Mid-Atlantic 2005
2817	WordStack	888	Mid-Atlantic 2005
2818	Making Change	744	Mid-Atlantic 2005, Practice Problem
1014	Dividing	12483	Mid-Central European Regional Contest 1999
1044	Date bugs	1291	Mid-Central European Regional Contest 1999
1093	Formatting Text	516	Mid-Central European Regional Contest 1999
1100	Dreisam Equations	405	Mid-Central European Regional Contest 1999
1101	The Game	3159	Mid-Central European Regional Contest 1999
1102	LC-Display	5652	Mid-Central European Regional Contest 1999
1103	Maze	505	Mid-Central European Regional Contest 1999
1104	Robbery	410	Mid-Central European Regional Contest 1999
1105	S-Trees	1085	Mid-Central European Regional Contest 1999
1142	Smith Numbers	3530	Mid-Central European Regional Contest 2000
1143	Number Game	1153	Mid-Central European Regional Contest 2000
1151	Atlantis	5780	Mid-Central European Regional Contest 2000
1391	Erdos Numbers	179	Mid-Central European Regional Contest 2000
1392	Ouroboros Snake	467	Mid-Central European Regional Contest 2000
1393	Fold-up Patterns	18	Mid-Central European Regional Contest 2000
1394	Railroad	237	Mid-Central European Regional Contest 2000
1188	Gleaming the Cubes	718	Mid-Central USA 1993
1541	Dart-a-Mania	77	Mid-Central USA 1993
1542	DNA Translation	71	Mid-Central USA 1995
1543	Perfect Cubes	6759	Mid-Central USA 1995
1544	A Puzzling Problem	131	Mid-Central USA 1995
1545	Galactic Import	172	Mid-Central USA 1995
1546	Basically Speaking	1869	Mid-Central USA 1995
1555	Polynomial Showdown	1473	Mid-Central USA 1996
1556	The Doors	2335	Mid-Central USA 1996
1557	Mapmaker	154	Mid-Central USA 1996
1558	Board Silly	154	Mid-Central USA 1996
1559	Equation Elation	127	Mid-Central USA 1996
1560	18 Wheeler Caravans (aka Semigroups)	48	Mid-Central USA 1996
1561	Another Puzzling Problem	108	Mid-Central USA 1996
1562	Oil Deposits	6924	Mid-Central USA 1997
1563	The Snail	917	Mid-Central USA 1997
1564	Sum It Up	3442	Mid-Central USA 1997
1565	Skew Binary	6568	Mid-Central USA 1997
1566	Haiku Review	501	Mid-Central USA 1997
1567	WIMP	43	Mid-Central USA 1997
1313	Booklet Printing	1100	Mid-Central USA 1998
1314	Finding Rectangles	629	Mid-Central USA 1998
1315	Don't Get Rooked	1368	Mid-Central USA 1998
1316	Self Numbers	10780	Mid-Central USA 1998
1317	Do the Untwist	1966	Mid-Central USA 1998
1318	Word Amalgamation	3933	Mid-Central USA 1998
1568	Find the Winning Move	440	Mid-Central USA 1999
1569	Myacm Triangles	614	Mid-Central USA 1999
1570	Exchange Rates	179	Mid-Central USA 1999
1571	Loansome Car Buyer	130	Mid-Central USA 1999
1572	Automatic Editing	628	Mid-Central USA 1999
1573	Robot Motion	5626	Mid-Central USA 1999
1009	Edge Detection	4349	Mid-Central USA 2000
1574	The Triangle Game	311	Mid-Central USA 2000
1575	Easier Done Than Said?	2531	Mid-Central USA 2000
1576	Colorville	187	Mid-Central USA 2000
1577	Falling Leaves	2165	Mid-Central USA 2000
1578	Instruens Fabulam	299	Mid-Central USA 2000
1003	Hangover	57914	Mid-Central USA 2001
1106	Transmitters	2464	Mid-Central USA 2001
1107	W's Cipher	2543	Mid-Central USA 2001
1108	Split Windows	178	Mid-Central USA 2001
1109	Index Generation	114	Mid-Central USA 2001
1110	Double Vision	221	Mid-Central USA 2001
1111	Image Perimeters	4419	Mid-Central USA 2001
1245	Programmer, Rank Thyself	432	Mid-Central USA 2002
1246	Hilbert Curve Intersections	62	Mid-Central USA 2002
1247	Magnificent Meatballs	4540	Mid-Central USA 2002
1248	Safecracker	1598	Mid-Central USA 2002
1249	Oil Pipeline	103	Mid-Central USA 2002
1250	Tanning Salon	3958	Mid-Central USA 2002
1251	Jungle Roads	8721	Mid-Central USA 2002
1547	Clay Bully	4444	Mid-Central USA 2003
1548	Robots	1559	Mid-Central USA 2003
1549	Bright Bracelet	134	Mid-Central USA 2003
1550	Treadmill	153	Mid-Central USA 2003
1551	Data Mining?	141	Mid-Central USA 2003
1552	Doubles	10706	Mid-Central USA 2003
1553	Fax Regions	35	Mid-Central USA 2003
1554	Tournament Brackets	81	Mid-Central USA 2003
2011	Primary X-Subfactor Series	140	Mid-Central USA 2004
2012	Triangle Cuts	35	Mid-Central USA 2004
2013	Symmetric Order	7620	Mid-Central USA 2004
2014	Flow Layout	2084	Mid-Central USA 2004
2015	Permutation Code	449	Mid-Central USA 2004
2016	Ink Blots	52	Mid-Central USA 2004
2017	Speed Limit	11808	Mid-Central USA 2004
2704	Pascal's Travels	1945	Mid-Central USA 2005
2705	Overflowing Bookshelf	564	Mid-Central USA 2005
2706	Connect	418	Mid-Central USA 2005
2707	Copier Reduction	4096	Mid-Central USA 2005
2708	Time to Graduate	193	Mid-Central USA 2005
2709	Painter	2001	Mid-Central USA 2005
2710	Consecutive Digits	980	Mid-Central USA 2005
2711	Leapin' Lizards	456	Mid-Central USA 2005
2712	Netiquette	456	Mid-Central USA 2005
3094	Quicksum	10072	Mid-Central USA 2006
3095	Linear Pachinko	999	Mid-Central USA 2006
3096	Surprising Strings	4010	Mid-Central USA 2006
3097	Falling Ice	67	Mid-Central USA 2006
3098	Frugal Search	413	Mid-Central USA 2006
3099	Go Go Gorelians	468	Mid-Central USA 2006
3100	Root of the Problem	5894	Mid-Central USA 2006
3649	Typesetting	193	Mid-Central USA 2007
3650	The Seven Percent Solution	4671	Mid-Central USA 2007
3651	Slink	22	Mid-Central USA 2007
3652	Persistent Bits	1167	Mid-Central USA 2007
3653	Here We Go(relians) Again	541	Mid-Central USA 2007
3654	Electronic Document Security	566	Mid-Central USA 2007
3655	Guard	69	Mid-Central USA 2007
3656	Rock Skipping	625	Mid-Central USA 2007
3912	Up and Down	95	Mid-Central USA 2009
3913	Gnome Sequencing	1496	Mid-Central USA 2009
3914	DuLL	218	Mid-Central USA 2009
3915	Black Vienna	53	Mid-Central USA 2009
3916	Duplicate Removal	1269	Mid-Central USA 2009
3917	Rock, Paper, Scissors	951	Mid-Central USA 2009
3918	A to Z Numerals	11	Mid-Central USA 2009
3919	Cell Towers	59	Mid-Central USA 2009
3920	RIPOFF	173	Mid-Central USA 2009
2926	Requirements	1027	MIT Programming Contest 2005
2927	Constructing Roads	34	MIT Programming Contest 2005
2928	A City of Skyscrapers	322	MIT Programming Contest 2005
2929	The Traveling Salesman	27	MIT Programming Contest 2005
2930	Dialing Dice	39	MIT Programming Contest 2005
2931	Procrastination	140	MIT Programming Contest 2005
2932	Coneology	618	MIT Programming Contest 2005
2933	Explaining the Stock Market	104	MIT Programming Contest 2005
1214	"Accordian" Patience	352	New Zealand 1989,UVA 127
1338	Ugly Numbers	8561	New Zealand 1990 Division I,UVA 136
1320	Street Numbers	1475	New Zealand 1990 Division I,UVA 138
1215	Gondwanaland Telecom	201	New Zealand 1991 Division I,UVA 145
1146	ID Codes	3773	New Zealand 1991 Division I,UVA 146
1268	Forests	40	New Zealand 1992 Division I,UVA 149
1209	Calendar	142	New Zealand 1993 Division I,uva 158
1211	Traffic Lights	177	New Zealand 1993 Division I,uva 161
1210	City Directions	32	New Zealand 1993 Division I,uva 163
3827	Facer is learning to swim	77	Ningbo 2009
3828	Zombies VS Plants	17	Ningbo 2009
3829	Seat taking up is tough	113	Ningbo 2009
3830	Ancient vending machine	41	Ningbo 2009
3831	Open-air shopping malls	137	Ningbo 2009
3832	Posters	153	Ningbo 2009
3833	Hamlet's gambling	22	Ningbo 2009
3834	Graph Game	50	Ningbo 2009
3835	Columbus's bargain	151	Ningbo 2009
3836	P2P File Sharing System	76	Ningbo 2009
1067	取石子游戏	12629	NOI
1182	食物链	14673	Noi 01
1183	反正切函数的应用	4604	Noi 01
1184	聪明的打字员	1287	Noi 01
1185	炮兵阵地	7262	Noi 01
1186	方程的解数	1531	Noi 01
1187	陨石的秘密	844	Noi 01
1189	钉子和小球	2101	Noi 99
1190	生日蛋糕	5709	Noi 99
1191	棋盘分割	4144	Noi 99
1192	最优连通子集	1361	Noi 99
1193	内存分配	547	Noi 99
1283	Moving Computer	907	NOIP 2001
2656	Unhappy Jinjin	7744	NOIP 2004
2632	Crashing Robots	3965	Nordic 2005
2633	Funny Games	144	Nordic 2005
2634	Nullary Computer	76	Nordic 2005
2635	The Embarrassed Cryptographer	2570	Nordic 2005
2636	Electrical Outlets	6410	Nordic 2005
2637	WorstWeather Ever	385	Nordic 2005
2638	Kingdom	101	Nordic 2005
2639	Necklace Decomposition	303	Nordic 2005
2640	Playground	952	Nordic 2005
3028	Shoot-out	212	Nordic 2006
3029	Tour Guide	248	Nordic 2006
3030	Nasty Hacks	8468	Nordic 2006
3031	Jezzball	33	Nordic 2006
3032	Card Trick	2959	Nordic 2006
3033	Traveling Salesman	129	Nordic 2006
3034	Whac-a-Mole	768	Nordic 2006
3035	Random Walking	206	Nordic 2006
3036	Honeycomb Walk	1289	Nordic 2006
3630	Phone List	6113	Nordic 2007
3631	Cuckoo Hashing	330	Nordic 2007
3632	Optimal Parking	4220	Nordic 2007
3633	Copying DNA	169	Nordic 2007
3634	Circle of Debt	79	Nordic 2007
3635	Full Tank?	3082	Nordic 2007
3636	Nested Dolls	1471	Nordic 2007
3637	Shopaholic	2592	Nordic 2007
3638	Moogle	438	Nordic 2007
1454	Factorial Frequencies	1100	North Central North America 1993
1537	Identifying Legal Pascal Real Constants	213	North Central North America 1993
1538	Extrapolation Using a Difference Table	151	North Central North America 1993
1539	Evaluating Simple C Expressions	264	North Central North America 1993
1540	The Finite State Text-Processing	29	North Central North America 1993
1307	Mapping the Route	204	North Central North America 1997
1308	Is It A Tree?	7152	North Central North America 1997
1309	Coconuts, Revisited	758	North Central North America 1997
1310	Nonstop Travel	171	North Central North America 1997
1311	Doing Windows	117	North Central North America 1997
1312	Numerically Speaking	592	North Central North America 1997
1441	Table	56	Northeastern Europe 1996
1442	Black Box	3510	Northeastern Europe 1996
1443	DEL command	65	Northeastern Europe 1996
1444	Parallelepiped walk	166	Northeastern Europe 1996
1445	Random number	38	Northeastern Europe 1996
1446	Moscow Time	124	Northeastern Europe 1996
1706	References	567	Northeastern Europe 1997
1707	Sum of powers	359	Northeastern Europe 1997
1708	Game	380	Northeastern Europe 1997
1709	Crossword	200	Northeastern Europe 1997
1710	Magic of David Copperfield	249	Northeastern Europe 1997
1711	Puncher	32	Northeastern Europe 1997
1712	Flying Stars	126	Northeastern Europe 1997
1713	Divide et unita	91	Northeastern Europe 1997
1029	False coin	6244	Northeastern Europe 1998
1030	Rating	393	Northeastern Europe 1998
1031	Fence	1090	Northeastern Europe 1998
1032	Parliament	7179	Northeastern Europe 1998
1033	Defragment	1628	Northeastern Europe 1998
1034	The dog task	1114	Northeastern Europe 1998
1035	Spell checker	7185	Northeastern Europe 1998
1036	Gangsters	2728	Northeastern Europe 1998
1745	Divisibility	2935	Northeastern Europe 1999
1746	Loan	29	Northeastern Europe 1999
1747	Expression	424	Northeastern Europe 1999
1748	Computer Dialogue	95	Northeastern Europe 1999
1749	Lock Manager	158	Northeastern Europe 1999
1750	Dictionary	764	Northeastern Europe 1999
1751	Highways	3438	Northeastern Europe 1999
1752	Advertisement	299	Northeastern Europe 1999
1753	Flip Game	15235	Northeastern Europe 2000
1754	Buffer Manager	355	Northeastern Europe 2000
1755	Triathlon	883	Northeastern Europe 2000
1756	Domino Puzzle	67	Northeastern Europe 2000
1757	Binary Search	315	Northeastern Europe 2000
1758	Frontier	112	Northeastern Europe 2000
1759	Garland	1023	Northeastern Europe 2000
1760	Disk Tree	468	Northeastern Europe 2000
2541	Binary Witch	440	Northeastern Europe 2000, Far-Eastern Subregion
2542	Fool Game	58	Northeastern Europe 2000, Far-Eastern Subregion
2543	Spreadsheet	89	Northeastern Europe 2000, Far-Eastern Subregion
2544	PreQueL	39	Northeastern Europe 2000, Far-Eastern Subregion
2545	Hamming Problem	2477	Northeastern Europe 2000, Far-Eastern Subregion
2546	Circular Area	1954	Northeastern Europe 2000, Far-Eastern Subregion
1064	Cable master	6791	Northeastern Europe 2001
1112	Team Them Up!	1582	Northeastern Europe 2001
1113	Wall	7192	Northeastern Europe 2001
1114	Chemical Reactions	345	Northeastern Europe 2001
1115	Statistical Trouble	73	Northeastern Europe 2001
1116	Library	249	Northeastern Europe 2001
1117	Pairs of Integers	862	Northeastern Europe 2001
1141	Brackets Sequence	5844	Northeastern Europe 2001
1647	One-move checkmate	371	Northeastern Europe 2001, Far-Eastern Subregion
1648	Countryside Highway	360	Northeastern Europe 2001, Far-Eastern Subregion
1649	Market Place	181	Northeastern Europe 2001, Far-Eastern Subregion
1650	Integer Approximation	1524	Northeastern Europe 2001, Far-Eastern Subregion
1651	Multiplication Puzzle	4965	Northeastern Europe 2001, Far-Eastern Subregion
1652	Holey Cloth	125	Northeastern Europe 2001, Far-Eastern Subregion
1653	Compacting Stickers	116	Northeastern Europe 2001, Far-Eastern Subregion
1625	Censored!	1342	Northeastern Europe 2001, Northern Subregion
1626	Chapayev	67	Northeastern Europe 2001, Northern Subregion
1629	Fillword	635	Northeastern Europe 2001, Northern Subregion
1860	Currency Exchange	8386	Northeastern Europe 2001, Northern Subregion
1861	Network	4009	Northeastern Europe 2001, Northern Subregion
1862	Stripies	6178	Northeastern Europe 2001, Northern Subregion
1863	Subnumber	97	Northeastern Europe 2001, Northern Subregion
1864	Funny Card Game	15	Northeastern Europe 2001, Northern Subregion
1267	Fence	160	Northeastern Europe 2001, Northern Subregion 2001(URAL 1159)
3399	Product	633	Northeastern Europe 2001, Western Subregion
3400	Dropping the stones	501	Northeastern Europe 2001, Western Subregion
3401	String reduction	351	Northeastern Europe 2001, Western Subregion
3402	Add a queen	241	Northeastern Europe 2001, Western Subregion
3403	"Bloody Mary"	29	Northeastern Europe 2001, Western Subregion
3404	Bridge over a rough river	1553	Northeastern Europe 2001, Western Subregion
3405	Convex hull	70	Northeastern Europe 2001, Western Subregion
3406	Last digit	657	Northeastern Europe 2001, Western Subregion
2171	Amusing Numbers	354	Northeastern Europe 2002
2172	Bricks	300	Northeastern Europe 2002
2173	Cricket Field	298	Northeastern Europe 2002
2174	Decoding Task	413	Northeastern Europe 2002
2175	Evacuation Plan	823	Northeastern Europe 2002
2176	Folding	499	Northeastern Europe 2002
2177	Ghost Busters	74	Northeastern Europe 2002
2178	Heroes Of Might And Magic	168	Northeastern Europe 2002
2179	Inlay Cutters	473	Northeastern Europe 2002
2530	Tetris Alphabet	470	Northeastern Europe 2002, Far-Eastern Subregion
2531	Network Saboteur	4689	Northeastern Europe 2002, Far-Eastern Subregion
2532	Burned Calendar	115	Northeastern Europe 2002, Far-Eastern Subregion
2533	Longest Ordered Subsequence	13960	Northeastern Europe 2002, Far-Eastern Subregion
2534	Falling cards	46	Northeastern Europe 2002, Far-Eastern Subregion
2535	Very Simple Problem	1470	Northeastern Europe 2002, Far-Eastern Subregion
2201	Cartesian Tree	1082	Northeastern Europe 2002, Northern Subregion
2202	Strange Graph	103	Northeastern Europe 2002, Northern Subregion
2203	Patience	70	Northeastern Europe 2002, Northern Subregion
2204	Commuter train	94	Northeastern Europe 2002, Northern Subregion
2205	Self-Replicating Numbers	153	Northeastern Europe 2002, Northern Subregion
2206	Magic Multiplying Machine	186	Northeastern Europe 2002, Northern Subregion
2207	Intuitionistic Logic	20	Northeastern Europe 2002, Northern Subregion
2208	Pyramids	772	Northeastern Europe 2002, Northern Subregion
2209	The King	3541	Northeastern Europe 2002, Northern Subregion
3407	Brookebond s'en va en guerre...	681	Northeastern Europe 2002, Western Subregion
3408	The Domino Principle	362	Northeastern Europe 2002, Western Subregion
3409	Broken line	176	Northeastern Europe 2002, Western Subregion
3410	Split convex polygon	136	Northeastern Europe 2002, Western Subregion
3411	Paid Roads	1944	Northeastern Europe 2002, Western Subregion
3412	Ray	323	Northeastern Europe 2002, Western Subregion
3413	RPG	423	Northeastern Europe 2002, Western Subregion
3414	Pots	5460	Northeastern Europe 2002, Western Subregion
1894	Alternative Scale of Notation	647	Northeastern Europe 2003
1895	Bring Them There	139	Northeastern Europe 2003
1896	Code Formatting	390	Northeastern Europe 2003
1897	Data Mining	92	Northeastern Europe 2003
1898	Entropy	130	Northeastern Europe 2003
1899	Farmer Bill's Problem	509	Northeastern Europe 2003
1900	Game	191	Northeastern Europe 2003
1901	Hypertransmission	242	Northeastern Europe 2003
1902	Illumination	30	Northeastern Europe 2003
1903	Jurassic Remains	339	Northeastern Europe 2003
1904	King's Quest	1789	Northeastern Europe 2003
2329	Nearest number - 2	917	Northeastern Europe 2003, Far-Eastern Subregion
2330	Advanced ASCII Cubes	310	Northeastern Europe 2003, Far-Eastern Subregion
2331	Water pipe	416	Northeastern Europe 2003, Far-Eastern Subregion
2332	One is good, but two is better	117	Northeastern Europe 2003, Far-Eastern Subregion
2333	Beach cut	121	Northeastern Europe 2003, Far-Eastern Subregion
2334	Simple prefix compression	615	Northeastern Europe 2003, Far-Eastern Subregion
1608	Banal Tickets	135	Northeastern Europe 2003, Northern Subregion
1627	Experiment "X": Explosions Expected	59	Northeastern Europe 2003, Northern Subregion
2123	Artinals	16	Northeastern Europe 2003, Northern Subregion
2124	Crankshaft	148	Northeastern Europe 2003, Northern Subregion
2125	Destroying The Graph	1505	Northeastern Europe 2003, Northern Subregion
2126	Factoring a Polynomial	1149	Northeastern Europe 2003, Northern Subregion
2127	Greatest Common Increasing Subsequence	1774	Northeastern Europe 2003, Northern Subregion
2128	Highways	853	Northeastern Europe 2003, Northern Subregion
2129	Invariant Polynomials	109	Northeastern Europe 2003, Northern Subregion
2130	Jogging	30	Northeastern Europe 2003, Northern Subregion
2131	Key Insertion	245	Northeastern Europe 2003, Northern Subregion
3546	Sea battle	379	Northeastern Europe 2003, Western Subregion
3547	Cube evolvent	89	Northeastern Europe 2003, Western Subregion
3548	Restoring the digits	146	Northeastern Europe 2003, Western Subregion
3549	GSM phone	33	Northeastern Europe 2003, Western Subregion
3550	AT – sequence	219	Northeastern Europe 2003, Western Subregion
3551	Putin-chess	24	Northeastern Europe 2003, Western Subregion
3552	Snatch!	59	Northeastern Europe 2003, Western Subregion
3553	Task schedule	208	Northeastern Europe 2003, Western Subregion
3554	Almost the shortest route	184	Northeastern Europe 2003, Western Subregion
2159	Ancient Cipher	9330	Northeastern Europe 2004
2160	Box	1302	Northeastern Europe 2004
2161	Chandelier	327	Northeastern Europe 2004
2162	Document Indexing	136	Northeastern Europe 2004
2163	Easy Trading	876	Northeastern Europe 2004
2164	Find the Border	116	Northeastern Europe 2004
2165	Gunman	350	Northeastern Europe 2004
2166	Heapsort	537	Northeastern Europe 2004
2167	Irrelevant Elements	403	Northeastern Europe 2004
2168	Joke with Turtles	243	Northeastern Europe 2004
2169	Kingdom of Magic	208	Northeastern Europe 2004
2170	Lattice Animals	150	Northeastern Europe 2004
2379	ACM Rank Table	998	Northeastern Europe 2004, Far-Eastern Subregion
2380	Sales Report	405	Northeastern Europe 2004, Far-Eastern Subregion
2381	Random Gap	997	Northeastern Europe 2004, Far-Eastern Subregion
2382	Radio Coverage	155	Northeastern Europe 2004, Far-Eastern Subregion
2383	Circle Drawing	192	Northeastern Europe 2004, Far-Eastern Subregion
2384	Harder Sokoban Problem	256	Northeastern Europe 2004, Far-Eastern Subregion
2094	Angry Teacher	131	Northeastern Europe 2004, Northern Subregion
2095	Beth Tableaux	19	Northeastern Europe 2004, Northern Subregion
2096	Collecting Bugs	2496	Northeastern Europe 2004, Northern Subregion
2097	Drawing Windows	19	Northeastern Europe 2004, Northern Subregion
2098	Ellipse	69	Northeastern Europe 2004, Northern Subregion
2099	Fool's Day	30	Northeastern Europe 2004, Northern Subregion
2100	Graveyard Design	1499	Northeastern Europe 2004, Northern Subregion
2101	Honey and Milk Land	1613	Northeastern Europe 2004, Northern Subregion
2102	Incredible! Impossible!	137	Northeastern Europe 2004, Northern Subregion
2103	Jackpot	153	Northeastern Europe 2004, Northern Subregion
2104	K-th Number	10081	Northeastern Europe 2004, Northern Subregion
2965	The Pilots Brothers' refrigerator	8053	Northeastern Europe 2004, Western Subregion
2966	A safe way	184	Northeastern Europe 2004, Western Subregion
2967	Triangles	606	Northeastern Europe 2004, Western Subregion
2968	Necklace	53	Northeastern Europe 2004, Western Subregion
2969	Divisibility by 15	611	Northeastern Europe 2004, Western Subregion
2970	The lazy programmer	426	Northeastern Europe 2004, Western Subregion
2971	"Switchback"	43	Northeastern Europe 2004, Western Subregion
2972	Laser-Ball	23	Northeastern Europe 2004, Western Subregion
2791	Area 51	182	Northeastern Europe 2005
2792	Brackets Removal	175	Northeastern Europe 2005
2793	Cactus	244	Northeastern Europe 2005
2794	Double Patience	298	Northeastern Europe 2005
2795	Exploring Pyramids	576	Northeastern Europe 2005
2796	Feel Good	3081	Northeastern Europe 2005
2797	Guards	69	Northeastern Europe 2005
2798	Hardwood Cutting	102	Northeastern Europe 2005
2799	IP Networks	740	Northeastern Europe 2005
2800	Joseph's Problem	1135	Northeastern Europe 2005
2801	Knockdown	58	Northeastern Europe 2005
3430	Pizza schedule	138	Northeastern Europe 2005, Far-Eastern Subregion
3431	Texture Tile	275	Northeastern Europe 2005, Far-Eastern Subregion
3432	Count Squares	991	Northeastern Europe 2005, Far-Eastern Subregion
3433	Road Accident	26	Northeastern Europe 2005, Far-Eastern Subregion
3434	Terrarium	185	Northeastern Europe 2005, Far-Eastern Subregion
3435	Sudoku Checker	691	Northeastern Europe 2005, Far-Eastern Subregion
3436	ACM Computer Factory	1865	Northeastern Europe 2005, Far-Eastern Subregion
3101	Astronomy	809	Northeastern Europe 2005, Northern Subregion
3102	Bee Garden	179	Northeastern Europe 2005, Northern Subregion
3103	Cutting a Block	576	Northeastern Europe 2005, Northern Subregion
3104	Drying	3253	Northeastern Europe 2005, Northern Subregion
3105	Expectation	402	Northeastern Europe 2005, Northern Subregion
3106	Flip and Turn	234	Northeastern Europe 2005, Northern Subregion
3107	Godfather	2311	Northeastern Europe 2005, Northern Subregion
3108	Horn Clauses	43	Northeastern Europe 2005, Northern Subregion
3109	Inner Vertices	522	Northeastern Europe 2005, Northern Subregion
3110	Jenny's First Exam	177	Northeastern Europe 2005, Northern Subregion
3111	K Best	1668	Northeastern Europe 2005, Northern Subregion
3555	Cocktail	74	Northeastern Europe 2005, Western Subregion
3556	Increasing subsequences	55	Northeastern Europe 2005, Western Subregion
3557	Map Generator	297	Northeastern Europe 2005, Western Subregion
3558	Map Generator returns (MG-II)	115	Northeastern Europe 2005, Western Subregion
3559	Trigonometric optimization	41	Northeastern Europe 2005, Western Subregion
3560	Supersquare	28	Northeastern Europe 2005, Western Subregion
3561	Pseudographical recognizer	808	Northeastern Europe 2005, Western Subregion
3562	“Roman” corridor	130	Northeastern Europe 2005, Western Subregion
3563	Parabolic teleports	12	Northeastern Europe 2005, Western Subregion
3564	Magic pyramid	15	Northeastern Europe 2005, Western Subregion
3148	ASCII Art	169	Northeastern Europe 2006
3149	Billing Tables	96	Northeastern Europe 2006
3150	Cellular Automaton	910	Northeastern Europe 2006
3151	Driving Directions	43	Northeastern Europe 2006
3152	Exchange	76	Northeastern Europe 2006
3153	Fool's Game	19	Northeastern Europe 2006
3154	Graveyard	666	Northeastern Europe 2006
3155	Hard Life	1295	Northeastern Europe 2006
3156	Interconnect	297	Northeastern Europe 2006
3157	Java vs C++	1818	Northeastern Europe 2006
3158	Kickdown	803	Northeastern Europe 2006
3426	Doors and... more doors	149	Northeastern Europe 2006, Far-Eastern Subregion
3423	Automaton optimization	296	Northeastern Europe 2006, Far-Eastern Subregion
3424	Better security	239	Northeastern Europe 2006, Far-Eastern Subregion
3425	Customer support	1173	Northeastern Europe 2006, Far-Eastern Subregion
3427	Ecology tax	2123	Northeastern Europe 2006, Far-Eastern Subregion
3428	Formatting function	266	Northeastern Europe 2006, Far-Eastern Subregion
3429	Geometry with a ruler	246	Northeastern Europe 2006, Far-Eastern Subregion
3379	Alphabet	106	Northeastern Europe 2006, Northern Subregion
3380	Bridges	396	Northeastern Europe 2006, Northern Subregion
3381	Confectionery	63	Northeastern Europe 2006, Northern Subregion
3382	Deciphering	61	Northeastern Europe 2006, Northern Subregion
3383	Equation	14	Northeastern Europe 2006, Northern Subregion
3384	Feng Shui	1024	Northeastern Europe 2006, Northern Subregion
3385	Genealogy	675	Northeastern Europe 2006, Northern Subregion
3386	Halloween Holidays	1531	Northeastern Europe 2006, Northern Subregion
3387	Ideal Frame	48	Northeastern Europe 2006, Northern Subregion
3388	Japanese Puzzle	394	Northeastern Europe 2006, Northern Subregion
3389	Kennings	64	Northeastern Europe 2006, Northern Subregion
3565	Ants	1378	Northeastern Europe 2007
3566	Building for UN	527	Northeastern Europe 2007
3567	Cactus Reloaded	245	Northeastern Europe 2007
3568	Diver	29	Northeastern Europe 2007
3569	Equation	104	Northeastern Europe 2007
3570	Fund Management	100	Northeastern Europe 2007
3571	Game	86	Northeastern Europe 2007
3572	Hanoi Towers	203	Northeastern Europe 2007
3573	I18n	199	Northeastern Europe 2007
3574	Japanese Writing	89	Northeastern Europe 2007
3575	Kingdom Partitioning	33	Northeastern Europe 2007
3576	Language Recognition	248	Northeastern Europe 2007
3535	A+B	307	Northeastern Europe 2007, Northern Subregion
3536	Beer Refrigerator	1781	Northeastern Europe 2007, Northern Subregion
3537	Crosses and Crosses	1049	Northeastern Europe 2007, Northern Subregion
3538	Domestic Networks	201	Northeastern Europe 2007, Northern Subregion
3539	Elevator	311	Northeastern Europe 2007, Northern Subregion
3540	Formula	23	Northeastern Europe 2007, Northern Subregion
3541	Given a string…	261	Northeastern Europe 2007, Northern Subregion
3542	History of Football	127	Northeastern Europe 2007, Northern Subregion
3543	iChess	962	Northeastern Europe 2007, Northern Subregion
3544	Journey with Pigs	731	Northeastern Europe 2007, Northern Subregion
3545	K’ak’-u-pakal and Mayan Script	27	Northeastern Europe 2007, Northern Subregion
3862	Asteroids	112	Northeastern Europe 2009
3863	Business Center	447	Northeastern Europe 2009
3865	Database	109	Northeastern Europe 2009
3866	Exclusive Access 2	63	Northeastern Europe 2009
3867	Funny Language	66	Northeastern Europe 2009
3868	Garbling Game	40	Northeastern Europe 2009
3869	Headshot	196	Northeastern Europe 2009
3870	Inspection	92	Northeastern Europe 2009
3871	Java Certification	28	Northeastern Europe 2009
3872	K-equivalence	29	Northeastern Europe 2009
3959	Alignment of Code	261	Northeastern Europe 2010
3960	Binary Operation	49	Northeastern Europe 2010
3961	Cactus Revolution	15	Northeastern Europe 2010
3962	Dome of Circus	127	Northeastern Europe 2010
3963	Evacuation Plan	118	Northeastern Europe 2010
3964	Factorial Simplification	60	Northeastern Europe 2010
3966	Hands of Poker	36	Northeastern Europe 2010
3967	Ideal Path	183	Northeastern Europe 2010
3968	Jungle Outpost	129	Northeastern Europe 2010
3969	K-Graph Oddity	74	Northeastern Europe 2010
1265	Area	2366	Northwestern Europe 2001
1395	Cog-Wheels	156	Northwestern Europe 2001
1447	Ambiguous Dates	58	Northwestern Europe 2001
1448	Cube	89	Northwestern Europe 2001
1449	Enigma	73	Northwestern Europe 2001
1450	Gridland	3970	Northwestern Europe 2001
1451	T9	1036	Northwestern Europe 2001
1452	Signal Box	23	Northwestern Europe 2001
1252	Euro Efficiency	1232	Northwestern Europe 2002
1253	Markov Trains	55	Northwestern Europe 2002
1254	Hansel and Grethel	909	Northwestern Europe 2002
1255	Floors	172	Northwestern Europe 2002
1259	The Picnic	288	Northwestern Europe 2002
1260	Pearls	4059	Northwestern Europe 2002
1261	Huffman Trees	80	Northwestern Europe 2002
1262	Input	297	Northwestern Europe 2002
1631	Bridging signals	5100	Northwestern Europe 2003
1632	Vase collection	652	Northwestern Europe 2003
1633	Gladiators	223	Northwestern Europe 2003
1634	Who's the boss?	760	Northwestern Europe 2003
1635	Subway tree systems	1971	Northwestern Europe 2003
1636	Prison rearrangement	1940	Northwestern Europe 2003
1637	Sightseeing tour	2533	Northwestern Europe 2003
1638	A number game	91	Northwestern Europe 2003
2058	Word Encoding	112	Northwestern Europe 2004
2059	Watchdog	776	Northwestern Europe 2004
2060	Taxi Cab Scheme	2038	Northwestern Europe 2004
2061	Pseudo-random Numbers	89	Northwestern Europe 2004
2062	Card Game Cheater	773	Northwestern Europe 2004
2063	Investment	2417	Northwestern Europe 2004
2064	Pipes	141	Northwestern Europe 2004
2065	SETI	899	Northwestern Europe 2004
2066	Minimax Triangulation	245	Northwestern Europe 2004
2764	Unequalled Consumption	95	Northwestern Europe 2005
2765	Declaration of Content	111	Northwestern Europe 2005
2766	Laserbox	626	Northwestern Europe 2005
2767	Bowlstack	255	Northwestern Europe 2005
2768	Pesky Heroes	86	Northwestern Europe 2005
2769	Reduced ID Numbers	2626	Northwestern Europe 2005
2770	Tantrix	51	Northwestern Europe 2005
2771	Guardian of Decency	1667	Northwestern Europe 2005
2772	Up the Stairs	595	Northwestern Europe 2005
3120	Sudoku	116	Northwestern Europe 2006
3121	The SetStack Computer	170	Northwestern Europe 2006
3122	Pie	4234	Northwestern Europe 2006
3123	Ticket to Ride	244	Northwestern Europe 2006
3124	The Bookcase	366	Northwestern Europe 2006
3125	Printer Queue	2213	Northwestern Europe 2006
3126	Prime Path	9216	Northwestern Europe 2006
3127	Lineland's Airport	64	Northwestern Europe 2006
3128	Leonardo's Notebook	780	Northwestern Europe 2006
3497	Assemble	789	Northwestern Europe 2007
3498	March of the Penguins	1407	Northwestern Europe 2007
3499	Containers	334	Northwestern Europe 2007
3500	Youth Hostel Dorm	88	Northwestern Europe 2007
3501	Escape from Enemy Territory	488	Northwestern Europe 2007
3502	Flight Safety	93	Northwestern Europe 2007
3503	Summits	314	Northwestern Europe 2007
3504	Obfuscation	349	Northwestern Europe 2007
3505	Tower Parking	999	Northwestern Europe 2007
3506	Walk	122	Northwestern Europe 2007
1271	Nice Milk	221	OIBH Online Programming Contest(OOPC)#1
1010	STAMPS	4387	Pacific Northwest 1998
1055	BULK MAILING	281	Pacific Northwest 1998
1056	IMMEDIATE DECODABILITY	5358	Pacific Northwest 1998
1057	FILE MAPPING	1142	Pacific Northwest 1998
1058	The Gourmet Club	401	Pacific Northwest 1998
1059	Chutes and Ladders	1025	Pacific Northwest 1998
1579	Function Run Fun	8189	Pacific Northwest 1999
1580	String Matching	1875	Pacific Northwest 1999
2191	Mersenne Composite Numbers	883	Pacific Northwest 2004
2192	Zipper	4638	Pacific Northwest 2004
2193	Lenny's Lucky Lotto Lists	798	Pacific Northwest 2004
2194	Stacking Cylinders	589	Pacific Northwest 2004
2195	Going Home	6840	Pacific Northwest 2004
2196	Specialized Four-Digit Numbers	5533	Pacific Northwest 2004
2197	Jill's Tour Paths	363	Pacific Northwest 2004
2198	Boundaries on	59	Pacific Northwest 2004
2199	Rate of Return	338	Pacific Northwest 2004
2200	A Card Trick	312	Pacific Northwest 2004
3798	Cave Crisis	35	Pacific Northwest 2008
3799	Optimal Strategy for the ICPC	21	Pacific Northwest 2008
3800	Repair Depots	1212	Pacific Northwest 2008
3801	Crazy Circuits	569	Pacific Northwest 2008
3594	Escort of Dr. Who How	424	PKU Campus 2008 (POJ Founder Monthly Contest – 2008.05.10), frkstyc
3595	Full Steiner Topologies	111	PKU Campus 2008 (POJ Founder Monthly Contest – 2008.05.10), frkstyc
3596	Illuminated Planet	76	PKU Campus 2008 (POJ Founder Monthly Contest – 2008.05.10), frkstyc
3597	Polygon Division	444	PKU Campus 2008 (POJ Founder Monthly Contest – 2008.05.10), frkstyc
3599	Pumping Lemma	71	PKU Campus 2008 (POJ Founder Monthly Contest – 2008.05.10), frkstyc
3600	Subimage Recognition	761	PKU Campus 2008 (POJ Founder Monthly Contest – 2008.05.10), frkstyc
3602	Typographical Ligatures	445	PKU Campus 2008 (POJ Founder Monthly Contest – 2008.05.10), frkstyc
3598	PopKart	154	PKU Campus 2008 (POJ Founder Monthly Contest – 2008.05.10), xfxyjwf
3601	Tower of Hanoi	537	PKU Campus 2008 (POJ Founder Monthly Contest – 2008.05.10), xfxyjwf
3603	Zen Puzzle Garden	32	PKU Campus 2008 (POJ Founder Monthly Contest – 2008.05.10), xfxyjwf
3738	Card Game	73	PKU Campus 2009 (POJ Monthly Contest – 2009.05.17), Asukalt
3737	UmBasketella	2660	PKU Campus 2009 (POJ Monthly Contest – 2009.05.17), cyqclark
3739	Special Squares	270	PKU Campus 2009 (POJ Monthly Contest – 2009.05.17), Doraemonok
3735	Training little cats	1956	PKU Campus 2009 (POJ Monthly Contest – 2009.05.17), Facer
3731	Escape	373	PKU Campus 2009 (POJ Monthly Contest – 2009.05.17), Rainer
3732	Paint Me Less	95	PKU Campus 2009 (POJ Monthly Contest – 2009.05.17), Rainer
3733	Shadow Area	39	PKU Campus 2009 (POJ Monthly Contest – 2009.05.17), Rainer
3734	Blocks	2796	PKU Campus 2009 (POJ Monthly Contest – 2009.05.17), Simon
3736	Snipe the Sniper	356	PKU Campus 2009 (POJ Monthly Contest – 2009.05.17), TN
3218	Alignments	210	PKU Local 2007 (POJ Monthly--2007.04.28), frkstyc
3220	Context-Free Languages	130	PKU Local 2007 (POJ Monthly--2007.04.28), frkstyc
3225	Help with Intervals	1590	PKU Local 2007 (POJ Monthly--2007.04.28), frkstyc
3223	Football Game	76	PKU Local 2007 (POJ Monthly--2007.04.28), frkstyc, text by Ikki
3224	Go for Lab Cup!	4433	PKU Local 2007 (POJ Monthly--2007.04.28), ideas from ava, text and test cases by frkstyc
3219	Binomial Coefficients	2446	PKU Local 2007 (POJ Monthly--2007.04.28), Ikki
3222	Edge Pairing	317	PKU Local 2007 (POJ Monthly--2007.04.28), ufx
3221	Diamond Puzzle	664	PKU Local 2007 (POJ Monthly--2007.04.28), wenxichang
2424	Flo's Restaurant	757	PKU Monthly,Alcyone
2422	The Wolves and the Sheep	49	PKU Monthly,CHEN Shixi(xreborner)
2425	A Chess Game	1210	PKU Monthly,CHEN Shixi(xreborner)
2423	The Parallel Challenge Ballgame	38	PKU Monthly,daofeng
2421	Constructing Roads	6988	PKU Monthly,kicc
2428	Surface Reconstruction	46	PKU Monthly,kicc
2427	Smith's Problem	256	PKU Monthly,static
2426	Remainder	428	PKU Monthly,Wang Yijie
2482	Stars in Your Window	1977	POJ Contest,Author:kinfkong@ZSU
2483	Greatest Common Subtree	121	POJ Contest,Author:kinfkong@ZSU
2486	Apple Tree	2525	POJ Contest,Author:magicpig@ZSU
2478	Farey Sequence	4164	POJ Contest,Author:Mathematica@ZSU
2479	Maximum sum	9929	POJ Contest,Author:Mathematica@ZSU
2480	Longge's problem	2032	POJ Contest,Author:Mathematica@ZSU
2481	Cows	4090	POJ Contest,Author:Mathematica@ZSU
2484	A Funny Game	3281	POJ Contest,Author:Mathematica@ZSU
2485	Highways	10036	POJ Contest,Author:Mathematica@ZSU
3472	Holey Square Tiling	204	POJ Founder Monthly Contest – 2007.12.30, frkstyc
3473	Stochastic Finite State Automaton	15	POJ Founder Monthly Contest – 2007.12.30, frkstyc
3474	Ellipsoid	16	POJ Founder Monthly Contest – 2007.12.30, frkstyc
3475	Paper-, er, Transcript-Folding Game	696	POJ Founder Monthly Contest – 2007.12.30, frkstyc
3476	A Game with Colored Balls	336	POJ Founder Monthly Contest – 2007.12.30, frkstyc
3477	System of Linear Equations	31	POJ Founder Monthly Contest – 2007.12.30, frkstyc
3478	Undergraduate Instruction Evaluation	25	POJ Founder Monthly Contest – 2007.12.30, frkstyc
3479	RoBa Has a Second Art Gallery!	63	POJ Founder Monthly Contest – 2007.12.30, frkstyc
3495	Bitwise XOR of Arithmetic Progression	181	POJ Founder Monthly Contest – 2008.01.31, frkstyc
3496	Word Hyphenation	8	POJ Founder Monthly Contest – 2008.01.31, frkstyc
3493	Chessboard Puzzle	216	POJ Founder Monthly Contest – 2008.01.31, Qi-feng CHEN
3489	Knapsack I	259	POJ Founder Monthly Contest – 2008.01.31, xfxyjwf
3490	Jumping Frogs	36	POJ Founder Monthly Contest – 2008.01.31, xfxyjwf
3491	Rotated Sky Charts	22	POJ Founder Monthly Contest – 2008.01.31, xfxyjwf
3492	Knapsack II	289	POJ Founder Monthly Contest – 2008.01.31, xfxyjwf
3494	Largest Submatrix of All 1’s	1885	POJ Founder Monthly Contest – 2008.01.31, xfxyjwf
3532	Resistance	268	POJ Founder Monthly Contest – 2008.03.16, g201513
3533	Light Switching Game	244	POJ Founder Monthly Contest – 2008.03.16, g201513
3529	Matrix Analysis	28	POJ Founder Monthly Contest – 2008.03.16, Gao Yihan
3530	A Modular Arithmetic Challenge	194	POJ Founder Monthly Contest – 2008.03.16, Gao Yihan
3534	Escape of Life and Death	200	POJ Founder Monthly Contest – 2008.03.16, Gao Yihan
3527	Generalized Connect Four	44	POJ Founder Monthly Contest – 2008.03.16, Jiang Liyang
3528	Ultimate Weapon	574	POJ Founder Monthly Contest – 2008.03.16, Jiang Liyang
3531	Alternating Sum of Digits	38	POJ Founder Monthly Contest – 2008.03.16, ShiningMoon
3583	Text Message Formatting	95	POJ Founder Monthly Contest – 2008.04.13, frkstyc
3584	Small Polynomial Factorization	10	POJ Founder Monthly Contest – 2008.04.13, frkstyc
3577	Global Positioning System	74	POJ Founder Monthly Contest – 2008.04.13, Lei Tao
3578	Card Game	57	POJ Founder Monthly Contest – 2008.04.13, Lei Tao
3579	Median	2988	POJ Founder Monthly Contest – 2008.04.13, Lei Tao
3582	Last Hit	6	POJ Founder Monthly Contest – 2008.04.13, TN
3580	SuperMemo	1851	POJ Founder Monthly Contest – 2008.04.13, Yao Jinyu
3581	Sequence	942	POJ Founder Monthly Contest – 2008.04.13, Yao Jinyu
3605	Sheryl's Circuit I	370	POJ Founder Monthly Contest – 2008.06.29, Dagger
3606	Sheryl's Circuit II	144	POJ Founder Monthly Contest – 2008.06.29, Dagger
3609	Reset Sequence	251	POJ Founder Monthly Contest – 2008.06.29, frkstyc
3610	Maclaurin Series of Reciprocals	26	POJ Founder Monthly Contest – 2008.06.29, frkstyc
3611	Minimum Weighted Perfect Fractional b-Matching	36	POJ Founder Monthly Contest – 2008.06.29, frkstyc
3607	Distribution of Toys	147	POJ Founder Monthly Contest – 2008.06.29, Huang Jinsong
3608	Bridge Across Islands	1212	POJ Founder Monthly Contest – 2008.06.29, Lei Tao
3604	Professor Ben	1200	POJ Founder Monthly Contest – 2008.06.29, Lin Ben
3676	Tomorrow Genius 2008	12	POJ Founder Monthly Contest – 2008.07.27, Dagger
3678	Katu Puzzle	2630	POJ Founder Monthly Contest – 2008.07.27, Dagger
3677	Chemical Weighing	43	POJ Founder Monthly Contest – 2008.07.27, Facer
3679	The Delivery of Control	40	POJ Founder Monthly Contest – 2008.07.27, Facer and Dagger
3674	Super Assassin	332	POJ Founder Monthly Contest – 2008.07.27, Mars
3675	Telescope	578	POJ Founder Monthly Contest – 2008.07.27, Updog
3680	Intervals	1779	POJ Founder Monthly Contest – 2008.07.27, windy7926778
3681	Finding the Rectangle	704	POJ Founder Monthly Contest – 2008.07.27, windy7926778
3683	Priest John's Busiest Day	2211	POJ Founder Monthly Contest – 2008.08.31, Dagger and Facer
3688	Cheat in the Game	341	POJ Founder Monthly Contest – 2008.08.31, facer
3689	Equations	74	POJ Founder Monthly Contest – 2008.08.31, Lei, Tao
3684	Physics Experiment	1049	POJ Founder Monthly Contest – 2008.08.31, Simon
3682	King Arthur's Birthday Celebration	824	POJ Founder Monthly Contest – 2008.08.31, Soduku@POJ
3685	Matrix	1384	POJ Founder Monthly Contest – 2008.08.31, windy7926778
3686	The Windy's	1410	POJ Founder Monthly Contest – 2008.08.31, windy7926778
3687	Labeling Balls	2940	POJ Founder Monthly Contest – 2008.08.31, windy7926778
3703	Intuition of Escape	60	POJ Founder Monthly Contest – 2008.10.05, cyqclark
3699	miniSQL	505	POJ Founder Monthly Contest – 2008.10.05, Dagger
3700	Missile Defence System	723	POJ Founder Monthly Contest – 2008.10.05, facer
3704	Mover	41	POJ Founder Monthly Contest – 2008.10.05, Lou Tiancheng
3705	Reverse	794	POJ Founder Monthly Contest – 2008.10.05, Lou Tiancheng
3706	System Test	38	POJ Founder Monthly Contest – 2008.10.05, Lou Tiancheng
3702	Chessman	440	POJ Founder Monthly Contest – 2008.10.05, windy7926778
3701	Rubik's Cube: 0-1 Version	31	POJ Founder Monthly Contest – 2008.10.05, withleave
3712	Edges and More Edges	147	POJ Founder Monthly Contest – 2008.12.28, Dagger
3713	Transferring Sylla	445	POJ Founder Monthly Contest – 2008.12.28, Dagger
3714	Raid	4379	POJ Founder Monthly Contest – 2008.12.28, Dagger
3707	High-Dimensional Vector Correspondence	16	POJ Founder Monthly Contest – 2008.12.28, frkstyc
3711	Mayan Pyramid	242	POJ Founder Monthly Contest – 2008.12.28, Panda
3709	K-Anonymous Sequence	1154	POJ Founder Monthly Contest – 2008.12.28, Rainer
3708	Recurrent Function	217	POJ Founder Monthly Contest – 2008.12.28, Yaojinyu
3710	Christmas Game	571	POJ Founder Monthly Contest – 2008.12.28, Yaojinyu
1810	Covering	128	POJ Monthly
1811	Prime Test	3475	POJ Monthly
1812	Zuma Game	95	POJ Monthly
1813	Overlapped Shapes	149	POJ Monthly
1814	Polynomial	16	POJ Monthly
1815	Friendship	1360	POJ Monthly
1816	Wild Words	887	POJ Monthly
3745	Keep Contact	11	POJ Monthly Contest - 2009.08.23, Elaxia
3743	LL’s cake	91	POJ Monthly Contest - 2009.08.23, Isun
3746	Teacher YYF	212	POJ Monthly Contest - 2009.08.23, Jason
3740	Easy Finding	2288	POJ Monthly Contest - 2009.08.23, MasterLuo
3744	Scout YYF I	1755	POJ Monthly Contest - 2009.08.23, Simon
3747	Scout YYF II	244	POJ Monthly Contest - 2009.08.23, Simon
3741	Number System Converter	146	POJ Monthly Contest - 2009.08.23, wjn
3742	Equivalent Polynomial	384	POJ Monthly Contest - 2009.08.23, wjn
3758	The story of three kingdoms XI	25	POJ Monthly Contest - 2010.04.04, 1318dotaer
3755	The Training of Chain Lightning	28	POJ Monthly Contest - 2010.04.04, Mars
3756	Chess Game	223	POJ Monthly Contest - 2010.04.04, Mars
3757	Simple Distributed storage system	217	POJ Monthly Contest - 2010.04.04, Yao Jinyu
3759	Simple Distributed computing system	64	POJ Monthly Contest - 2010.04.04, Yao Jinyu
3721	Darkterror's Combos	57	POJ Monthly Contest – 2009.02.22, Dagger
3722	We're Going In	17	POJ Monthly Contest – 2009.02.22, Dagger
3717	Decrypt the Dragon Scroll	109	POJ Monthly Contest – 2009.02.22, Facer
3718	Facer's Chocolate Dream	119	POJ Monthly Contest – 2009.02.22, Facer
3720	Occurrence of Digits	1351	POJ Monthly Contest – 2009.02.22, Lei Tao
3719	Art of Balance	152	POJ Monthly Contest – 2009.02.22, Mars
3716	Panda's Birthday Present	927	POJ Monthly Contest – 2009.02.22, Simon
3715	Blue and Red	523	POJ Monthly Contest – 2009.02.22, Windy
3729	Facer’s string	325	POJ Monthly Contest – 2009.04.05, Facer
3728	The merchant	1059	POJ Monthly Contest – 2009.04.05, GaoYihan
3730	Ebbinghaus method	62	POJ Monthly Contest – 2009.04.05, geniushjs
3727	Newton’s Method	127	POJ Monthly Contest – 2009.04.05, longpo
3724	Find the parameter	399	POJ Monthly Contest – 2009.04.05, Simon
3726	Windy's ABC	192	POJ Monthly Contest – 2009.04.05, windy7926778
3723	Conscription	3944	POJ Monthly Contest – 2009.04.05, windy7926778
3725	I know the k-th integer	421	POJ Monthly Contest – 2009.04.05, windy7926778
2438	Children's Dining	434	POJ Monthly,anonymous
2444	Partition a Matrix	436	POJ Monthly,c0500301036
2446	Chessboard	3449	POJ Monthly,charlescpp
2310	Cubic Tick-Tack-Toe	43	POJ Monthly,CHEN Shixi(xreborner)
2311	Cutting Game	1551	POJ Monthly,CHEN Shixi(xreborner)
2233	GAME AGAIN!	136	POJ Monthly,dodo
2442	Sequence	2010	POJ Monthly,Guang Lin
2445	Squares	99	POJ Monthly,Guang Lin
2236	Wireless Network	7399	POJ Monthly,HQM
2237	Can 1 Marine win 2 Zerglings?	49	POJ Monthly,HQM
2235	Triangularize the Convex Hull	35	POJ Monthly,kicc
2314	POJ language	68	POJ Monthly,kicc
2153	Rank List	1995	POJ Monthly,Li Haoyuan
2239	Selecting Courses	3520	POJ Monthly,Li Haoyuan
2156	National Day Celebration	101	POJ Monthly,Loger
2152	Fire	705	POJ Monthly,Lou Tiancheng
2154	Color	1849	POJ Monthly,Lou Tiancheng
2155	Matrix	6428	POJ Monthly,Lou Tiancheng
2309	BST	5044	POJ Monthly,Minkerui
2313	Sequence	1234	POJ Monthly,Minkerui
2443	Set Operation	1068	POJ Monthly,Minkerui
2448	A New Operating System	84	POJ Monthly,Minkerui
2234	Matches Game	5207	POJ Monthly,readchild
1817	Traffic Jam	110	POJ Monthly,Southeast USA 1999
2440	DNA	1141	POJ Monthly,Static
2447	RSA	412	POJ Monthly,static
2452	Sticks Problem	1932	POJ Monthly,static
2441	Arrange the Bulls	1309	POJ Monthly,TN
2315	Football Game	164	POJ Monthly,uni
2157	Maze	995	POJ Monthly,Wang Yijie
2308	Dearboy's Puzzle	194	POJ Monthly,Wang Yijie
2453	An Easy Problem	4188	POJ Monthly,zby03
2439	Disconnect the Orange!?	70	POJ Monthly,Zeyuan Zhu
2449	Remmarguts' Date	5178	POJ Monthly,Zeyuan Zhu
2450	A New Kind of Chess	38	POJ Monthly,Zeyuan Zhu
2451	Uyuw's Concert	1421	POJ Monthly,Zeyuan Zhu
2158	A Difficult Mathematics Problem	104	POJ Monthly,李学武
2232	New Stone-Forfex-Cloth Game	500	POJ Monthly,汪艺杰
2151	Check the difficulty of problems	2330	POJ Monthly,鲁小石
2238	Computer Basketball Game	94	POJ Monthly,鲁小石
2312	Battle City	2366	POJ Monthly,鲁小石
1659	Frogs' Neighborhood	3100	POJ Monthly--2004.05.15 Alcyone@pku
1662	CoIns	191	POJ Monthly--2004.05.15 BearL@pku
1661	Help Jimmy	3158	POJ Monthly--2004.05.15 CEOI 2000
1660	Princess FroG	404	POJ Monthly--2004.05.15 duoshute@pku
1655	Balancing Act	5081	POJ Monthly--2004.05.15 IOI 2003 sample task
1654	Area	3553	POJ Monthly--2004.05.15 Liu Rujia@POJ
1656	Counting Black	6335	POJ Monthly--2004.05.15 Liu Rujia@POJ
1657	Distance on Chessboard	8066	POJ Monthly--2004.05.15 Liu Rujia@POJ
1658	Eva's Problem	10135	POJ Monthly--2004.05.15 Null
1682	Clans on the Three Gorges	309	POJ Monthly--2004.06.27 epic
1675	Happy Birthday!	885	POJ Monthly--2004.06.27 srbga@POJ
1677	Girls' Day	578	POJ Monthly--2004.06.27 srbga@POJ
1678	I Love this Game!	714	POJ Monthly--2004.06.27 srbga@POJ
1679	The Unique MST	6399	POJ Monthly--2004.06.27 srbga@POJ
1680	Fork() Makes Trouble	299	POJ Monthly--2004.06.27 srbga@POJ
1681	Painter's Problem	2163	POJ Monthly--2004.06.27 张嘉龄
1674	Sorting by Swapping	4054	POJ Monthly--2004.06.27 弱人
1676	What time is it?	626	POJ Monthly--2004.06.27 鄂继明
1698	Alice's Chance	1893	POJ Monthly--2004.07.18
1699	Best Sequence	3077	POJ Monthly--2004.07.18
1700	Crossing River	6136	POJ Monthly--2004.07.18
1701	Dissatisfying Lift	1013	POJ Monthly--2004.07.18
1702	Eva's Balance	1727	POJ Monthly--2004.07.18
1703	Find them, Catch them	8925	POJ Monthly--2004.07.18
1704	Georgia and Bob	3163	POJ Monthly--2004.07.18
1705	Generational Replacement	75	POJ Monthly--2004.07.18
2519	Cutting Necklace	81	POJ Monthly--2005.07.31, CHEN Shixi
2520	DNA Sequence Alignment	76	POJ Monthly--2005.07.31, CHEN Shixi
2518	Little guys' game	108	POJ Monthly--2005.07.31, Huang Ninghai
2514	Ridiculous Addition	307	POJ Monthly--2005.07.31, Islamic Azad University of Mashhad – Collegiate Coding Challenge 1
2517	Cover	23	POJ Monthly--2005.07.31, LouTianCheng
2516	Minimum Cost	3200	POJ Monthly--2005.07.31, Wang Yijie
2521	How much did the businessman lose	6905	POJ Monthly--2005.07.31, Wang Yijie
2515	Birthday Cake	252	POJ Monthly--2005.07.31, Zeyuan Zhu
2592	Standard Point System	106	POJ Monthly--2005.08.28,anonymous
2596	Dice Stacking	311	POJ Monthly--2005.08.28,Huang Ninghai
2598	Match Throwing Game	258	POJ Monthly--2005.08.28,kicc
2593	Max Sequence	6067	POJ Monthly--2005.08.28,Li Haoyuan
2594	Treasure Exploration	2618	POJ Monthly--2005.08.28,Li Haoyuan
2591	Set Definition	3437	POJ Monthly--2005.08.28,Static
2595	Min-Max	281	POJ Monthly--2005.08.28,Static
2597	Line Segment Erase	347	POJ Monthly--2005.08.28,Static
2748	Logs Stacking	802	POJ Monthly--2006.01.22,anonymous
2751	Saving Endeavour	692	POJ Monthly--2006.01.22,anonymous
2755	Dominoes	38	POJ Monthly--2006.01.22,Loger
2750	Potted Flower	1379	POJ Monthly--2006.01.22,Zeyuan Zhu
2752	Seek the Name, Seek the Fame	7009	POJ Monthly--2006.01.22,Zeyuan Zhu
2753	Similarity of necklaces	35	POJ Monthly--2006.01.22,Zeyuan Zhu
2754	Similarity of necklaces 2	179	POJ Monthly--2006.01.22,Zeyuan Zhu
2749	Building roads	1425	POJ Monthly--2006.01.22,zhucheng
2756	Autumn is a Genius	1498	POJ Monthly--2006.02.26,zgl & twb
2757	Beautiful Numbers	112	POJ Monthly--2006.02.26,zgl & twb
2758	Checking the Text	467	POJ Monthly--2006.02.26,zgl & twb
2759	Distributing tasks	156	POJ Monthly--2006.02.26,zgl & twb
2760	End of Windless Days	183	POJ Monthly--2006.02.26,zgl & twb
2761	Feed the dogs	3019	POJ Monthly--2006.02.26,zgl & twb
2762	Going from u to v or from v to u?	2875	POJ Monthly--2006.02.26,zgl & twb
2763	Housewife Wind	1752	POJ Monthly--2006.02.26,zgl & twb
2777	Count Color	7919	POJ Monthly--2006.03.26,dodo
2778	DNA Sequence	2954	POJ Monthly--2006.03.26,dodo
2775	The Number of the Same BST	422	POJ Monthly--2006.03.26,newton88518
2773	Happy 2006	2564	POJ Monthly--2006.03.26,static
2780	Linearity	1200	POJ Monthly--2006.03.26,static
2774	Long Long Message	5348	POJ Monthly--2006.03.26,Zeyuan Zhu,"Dedicate to my great beloved mother."
2779	Atom Bombs!? God!	44	POJ Monthly--2006.03.26,Zeyuan Zhu,Modified from NEERC2005 Area
2776	Cheat at Math	18	POJ Monthly--2006.03.26,Zeyuan Zhu,Modified from Timus 1429
2825	Perfect Permutation	152	POJ Monthly--2006.04.28, Dagger@PKU_RPWT
2826	An Easy Problem?!	1272	POJ Monthly--2006.04.28, Dagger@PKU_RPWT
2819	TN's Kingdom I - Establishment	181	POJ Monthly--2006.04.28, frkstyc@PKU_RPWT
2820	TN's Kingdom II - Construction	38	POJ Monthly--2006.04.28, frkstyc@PKU_RPWT
2821	TN's Kingdom III - Assassination	75	POJ Monthly--2006.04.28, frkstyc@PKU_RPWT
2822	TN's Kingdom IV - Collapse	78	POJ Monthly--2006.04.28, frkstyc@PKU_RPWT
2823	Sliding Window	9590	POJ Monthly--2006.04.28, Ikki
2824	Bohemian Rhapsody	18	POJ Monthly--2006.04.28, TN@PKU_RPWT
2834	Where Are You?	172	POJ Monthly--2006.05.28, Judas
2829	How Many Free Dimensions?	26	POJ Monthly--2006.05.28, Liang, Shaochi
2827	Auto-Calculation Machine	347	POJ Monthly--2006.05.28, Static
2830	Max Sequence II	84	POJ Monthly--2006.05.28, Static
2833	The Average	2603	POJ Monthly--2006.05.28, zby03
2828	Buy Tickets	5927	POJ Monthly--2006.05.28, Zhu, Zeyuan
2831	Can We Build This One?	448	POJ Monthly--2006.05.28, zhucheng
2832	How Many Pairs?	451	POJ Monthly--2006.05.28, zhucheng
2843	Cutting Cake	134	POJ Monthly--2006.06.25, Chen Xue
2837	Silver Matrix	574	POJ Monthly--2006.06.25, Lei Tao
2840	Big Clock	5932	POJ Monthly--2006.06.25, Lei Tao
2839	Convex Hull and Triangle	30	POJ Monthly--2006.06.25, Long Fan
2842	N-dimension Matching	85	POJ Monthly--2006.06.25, Long Fan
2841	Navigation Game	67	POJ Monthly--2006.06.25, Yang Yi
2844	Sum and Product	74	POJ Monthly--2006.06.25, Yang Yi
2838	Graph Connectivity	504	POJ Monthly--2006.06.25, Zheng Zhao
2888	Magic Bracelet	1036	POJ Monthly--2006.07.30, cuiaoxiang
2893	M × N Puzzle	861	POJ Monthly--2006.07.30, newton88518
2886	Who Gets the Most Candies?	2531	POJ Monthly--2006.07.30, Sempr
2890	Matrix Multiplication	371	POJ Monthly--2006.07.30, Static
2891	Strange Way to Express Integers	3540	POJ Monthly--2006.07.30, Static
2892	Tunnel Warfare	2315	POJ Monthly--2006.07.30, updog
2889	Unique Solution	166	POJ Monthly--2006.07.30, Wang, Yijie
2887	Big String	1185	POJ Monthly--2006.07.30, zhucheng
2982	Time Travel	370	POJ Monthly--2006.08.27, Dagger
2983	Is the Information Reliable?	2352	POJ Monthly--2006.08.27, Dagger
2981	Deal of Fortune	21	POJ Monthly--2006.08.27, frkstyc
2987	Firing	1707	POJ Monthly--2006.08.27, frkstyc
2988	Function Approximation	40	POJ Monthly--2006.08.27, frkstyc
2986	A Triangle and a Circle	443	POJ Monthly--2006.08.27, Rainer
2984	A New Joseph Problem	475	POJ Monthly--2006.08.27, zcgzcgzcg
2985	The k-th Largest Group	1739	POJ Monthly--2006.08.27, zcgzcgzcg
3015	Expected Difference	260	POJ Monthly--2006.09.29, ACRush
3016	K-Monotonic	262	POJ Monthly--2006.09.29, ACRush, modified from TopCoder SRM 309 KMonotonic
3012	A Number from Yanghui Triangle	624	POJ Monthly--2006.09.29, Kim, Chan Min (kcm1700@POJ)
3013	Big Christmas Tree	2529	POJ Monthly--2006.09.29, Kim, Chan Min (kcm1700@POJ)
3014	Cake Pieces and Plates	1189	POJ Monthly--2006.09.29, Kim, Chan Min (kcm1700@POJ)
3018	Giftbox	744	POJ Monthly--2006.09.29, sza
3019	Image Rotation	17	POJ Monthly--2006.09.29, zby03
3017	Cut the Sequence	1941	POJ Monthly--2006.09.29, zhucheng
3162	Walking Race	583	POJ Monthly--2006.12.31, flymouse
3163	King of Fighters	86	POJ Monthly--2006.12.31, flymouse
3161	Numerical Integration	4	POJ Monthly--2006.12.31, galaxy
3164	Command Network	2332	POJ Monthly--2006.12.31, galaxy
3159	Candies	4469	POJ Monthly--2006.12.31, Sempr
3160	Father Christmas flymouse	716	POJ Monthly--2006.12.31, Sempr
3165	Traveling Trio	19	POJ Monthly--2006.12.31, Zhu, Zeyuan
3166	Jumping Frog	73	POJ Monthly--2006.12.31, Zhu, Zeyuan
3202	A Very Simple Compiler	4	POJ Monthly--2007.03.04, Hou, Qiming
3203	Incremental Python Parsing	8	POJ Monthly--2007.03.04, Hou, Qiming
3204	Ikki's Story I - Road Reconstruction	1340	POJ Monthly--2007.03.04, Ikki
3205	Ikki's Story II - War with TN	175	POJ Monthly--2007.03.04, Ikki
3206	Ikki's Story III - Rescue frkstyc!	95	POJ Monthly--2007.03.04, Ikki
3207	Ikki's Story IV - Panda's Trick	2616	POJ Monthly--2007.03.04, Ikki
3209	From Pythagoras to …	205	POJ Monthly--2007.03.04, Ikki
3208	Apocalypse Someday	950	POJ Monthly--2007.03.04, Ikki, adapted from TCHS SRM 2 ApocalypseSomeday
3216	Repairing Company	1340	POJ Monthly--2007.04.01, crazyb0y
3214	Heap	438	POJ Monthly--2007.04.01, czh
3211	Washing Clothes	2209	POJ Monthly--2007.04.01, dearboy
3215	Median of Lines	134	POJ Monthly--2007.04.01, dearboy
3217	Eugenics	262	POJ Monthly--2007.04.01, Huang, Jinsong
3212	Rescue Alice	276	POJ Monthly--2007.04.01, Liu, Cheng
3210	Coins	4408	POJ Monthly--2007.04.01, Snoopy
3213	PM3	989	POJ Monthly--2007.04.01, zhucheng
3233	Matrix Power Series	6955	POJ Monthly--2007.06.03, Huang, Jinsong
3240	Solution to the n2 − 1 Puzzle	44	POJ Monthly--2007.06.03, Huang, Jinsong
3234	The Kylin Den	15	POJ Monthly--2007.06.03, Jia, You
3236	Michelle's Evaluation	64	POJ Monthly--2007.06.03, Jia, You
3235	Super Knight	40	POJ Monthly--2007.06.03, Lei, Tao
3237	Tree	1307	POJ Monthly--2007.06.03, Lei, Tao
3238	A Coin Game	73	POJ Monthly--2007.06.03, Yao, Jinyu
3239	Solution to the n Queens Puzzle	1272	POJ Monthly--2007.06.03, Yao, Jinyu
3245	Sequence Partitioning	199	POJ Monthly--2007.07.08, Chen, Danqi
3242	3-dimensional Musical Water-fence	27	POJ Monthly--2007.07.08, Chen, Qifeng
3248	Soldier	63	POJ Monthly--2007.07.08, Chen, Qifeng
3243	Clever Y	1028	POJ Monthly--2007.07.08, Guo, Huayang
3247	Robots	7	POJ Monthly--2007.07.08, Guo, Huayang
3246	Game	247	POJ Monthly--2007.07.08, Wang, Dong
3244	Difference between Triplets	623	POJ Monthly--2007.07.08, Yuan, Xinhao
3249	Test for Job	1624	POJ Monthly--2007.07.08, 落叶飞雪
3324	Lucas-Lehmer Test	95	POJ Monthly--2007.08.05, frkstyc
3319	Dragon Slayer Qualification Exam	81	POJ Monthly--2007.08.05, Hooyeon Lee (ltdtl@POJ), "I like dragons"
3321	Apple Tree	6278	POJ Monthly--2007.08.05, Huang, Jinsong
3320	Jessica's Reading Problem	4187	POJ Monthly--2007.08.05, Jerry
3241	Object Clustering	435	POJ Monthly--2007.08.05, Li, Haoyuan
3318	Matrix Multiplication	3197	POJ Monthly--2007.08.05, qzc
3322	Bloxorz I	1478	POJ Monthly--2007.08.05, Rainer
3323	Bloxorz II	139	POJ Monthly--2007.08.05, Rainer
3372	Candy Distribution	2772	POJ Monthly--2007.09.09, ailyanlu@zsu
3377	Ferry Lanes	637	POJ Monthly--2007.09.09, Dagger
3371	Flesch Reading Ease	498	POJ Monthly--2007.09.09, frkstyc
3373	Changing Digits	793	POJ Monthly--2007.09.09, Rainer
3378	Crazy Thairs	1107	POJ Monthly--2007.09.09, tdzl2003
3374	Cake Share	603	POJ Monthly--2007.09.09, Updog
3375	Network Connection	465	POJ Monthly--2007.09.09, Updog
3376	Finding Palindromes	390	POJ Monthly--2007.09.09, Zhou Gelin, modified from POI06
3421	X-factor Chains	2000	POJ Monthly--2007.10.06, ailyanlu@zsu
3418	Quadratic Functions	100	POJ Monthly--2007.10.06, Amber(hupo001)@POJ
3420	Quad Tiling	1587	POJ Monthly--2007.10.06, Dagger
3422	Kaka's Matrix Travels	2222	POJ Monthly--2007.10.06, Huang, Jinsong
3419	Difference Is Beautiful	462	POJ Monthly--2007.10.06, SHOIT@ZSU
3416	Crossing	540	POJ Monthly--2007.10.06, Wang Dong
3415	Common Substrings	2164	POJ Monthly--2007.10.06, wintokk
3417	Network	1471	POJ Monthly--2007.10.06, Yang Mu
3464	Approximations	21	POJ Monthly--2007.11.25, Yang Yi
3465	Battle	404	POJ Monthly--2007.11.25, Yang Yi
3466	Distance to the Prey	14	POJ Monthly--2007.11.25, Yang Yi
3467	Cross Counting	291	POJ Monthly--2007.11.25, Yang Yi
3468	A Simple Problem with Integers	15728	POJ Monthly--2007.11.25, Yang Yi
3469	Dual Core CPU	3721	POJ Monthly--2007.11.25, Zhou Dong
3470	Walls	210	POJ Monthly--2007.11.25, Zhou Dong
3471	Integral Roots	174	POJ Monthly--2007.11.25, Zhou Dong
1831	不定方程组	190	qinlu@POJ
1832	连环锁	379	qinlu@POJ
1833	排列	5617	qinlu@POJ
1834	线段处理	57	qinlu@POJ
1835	宇航员	1800	qinlu@POJ
2316	SPIN	2939	Rocky Mountain 2003
2317	SHAKE	281	Rocky Mountain 2003
2318	TOYS	4894	Rocky Mountain 2003
2319	COMPRESS	98	Rocky Mountain 2003
2320	SHEET	115	Rocky Mountain 2003
2321	GYM	239	Rocky Mountain 2003
2322	PLANKS	93	Rocky Mountain 2003
2323	PERMS	526	Rocky Mountain 2003
2000	Gold Coins	12726	Rocky Mountain 2004
2001	Shortest Prefixes	5685	Rocky Mountain 2004
2002	Squares	4286	Rocky Mountain 2004
2003	Hire and Fire	552	Rocky Mountain 2004
2004	Mix and Build	658	Rocky Mountain 2004
2005	Blackjack	533	Rocky Mountain 2004
2006	Litmus Test	930	Rocky Mountain 2004
2007	Scrambled Polygon	3186	Rocky Mountain 2004
2713	Tire Dimensions	288	Rocky Mountain 2005
2714	Random Walk	290	Rocky Mountain 2005
2715	Paint Mix	338	Rocky Mountain 2005
2716	Open and Close	58	Rocky Mountain 2005
2717	Hour Glass	45	Rocky Mountain 2005
2718	Smallest Difference	2664	Rocky Mountain 2005
2719	Faulty Odometer	4651	Rocky Mountain 2005
2720	Last Digits	282	Rocky Mountain 2005
2721	Suit Distribution	386	Rocky Mountain 2005
3437	Tree Grafting	814	Rocky Mountain 2007
3438	Look and Say	4701	Rocky Mountain 2007
3439	Server Relocation	546	Rocky Mountain 2007
3440	Coin Toss	772	Rocky Mountain 2007
3441	Vacation Rentals	186	Rocky Mountain 2007
3442	Baseball	85	Rocky Mountain 2007
3443	Team Work	170	Rocky Mountain 2007
3444	Wavelet Compression	1275	Rocky Mountain 2007
3445	Elementary Additions	1186	Rocky Mountain 2007
1818	ATP	279	Romania OI 2002
1819	Disks	336	Romania OI 2002
1820	Expression	13	Romania OI 2002
1821	Fence	1517	Romania OI 2002
1822	Fence2	112	Romania OI 2002
1823	Hotel	823	Romania OI 2002
1824	TwoFour	32	Romania OI 2002
1825	Young	132	Romania OI 2002
1836	Alignment	4118	Romania OI 2002
1837	Balance	6531	Romania OI 2002
1838	Banana	559	Romania OI 2002
1840	Eqs	4356	Romania OI 2002
1843	Shire	21	Romania OI 2002
1844	Sum	5985	Romania OI 2002
1845	Sumdiv	4243	Romania OI 2002
1846	System	79	Romania OI 2002
1848	Tree	980	Romania OI 2002
1850	Code	3849	Romania OI 2002
3970	Party	2258	Seventh ACM Egyptian National Programming Contest
3971	Scales	136	Seventh ACM Egyptian National Programming Contest
3972	BF	51	Seventh ACM Egyptian National Programming Contest
3973	Highlights	54	Seventh ACM Egyptian National Programming Contest
3974	Palindrome	2880	Seventh ACM Egyptian National Programming Contest
3975	Shortcut	63	Seventh ACM Egyptian National Programming Contest
3976	Kings	38	Seventh ACM Egyptian National Programming Contest
3977	Subset	830	Seventh ACM Egyptian National Programming Contest
3978	Primes	1365	Seventh ACM Egyptian National Programming Contest
2280	Amphiphilic Carbon Molecules	340	Shanghai 2004
2281	Link and Pop -- the Block Game	127	Shanghai 2004
2282	The Counting Problem	1927	Shanghai 2004
2283	Different Digits	446	Shanghai 2004
2284	That Nice Euler Circuit	447	Shanghai 2004
2285	The Floor Bricks	123	Shanghai 2004
2286	The Rotation Game	1407	Shanghai 2004
2287	Tian Ji -- The Horse Racing	3515	Shanghai 2004
2288	Islands and Bridges	1908	Shanghai 2004
2289	Jamie's Contact Groups	1414	Shanghai 2004
2078	Matrix	1453	Shanghai 2004 Preliminary
2079	Triangle	1474	Shanghai 2004 Preliminary
2080	Calendar	3934	Shanghai 2004 Preliminary
2081	Recaman's Sequence	7096	Shanghai 2004 Preliminary
2082	Terrible Sets	1766	Shanghai 2004 Preliminary
2083	Fractal	7015	Shanghai 2004 Preliminary
2084	Game of Connections	3192	Shanghai 2004 Preliminary
2085	Inversion	1464	Shanghai 2004 Preliminary
3138	ACM Team Selection	820	Shanghai 2006
3139	Balancing the Scale	386	Shanghai 2006
3140	Contestants Division	1892	Shanghai 2006
3141	Distant Galaxy	434	Shanghai 2006
3142	Escape Plan	49	Shanghai 2006
3143	False Perceptions	14	Shanghai 2006
3144	Guarding Zion	17	Shanghai 2006
3145	Harmony Forever	503	Shanghai 2006
3146	Interesting Yang Hui Triangle	717	Shanghai 2006
3147	John's Canonical Difference Bound Matrices	59	Shanghai 2006
3112	Digital Biochemist Circuit	341	South America 2006, Brazil Subregion
3113	The Halting Problem	27	South America 2006, Brazil Subregion
3114	Countries in War	790	South America 2006, Brazil Subregion
3115	Energy × Delay	116	South America 2006, Brazil Subregion
3116	MegaCheckers	36	South America 2006, Brazil Subregion
3117	World Cup	4093	South America 2006, Brazil Subregion
3118	Critical Route	69	South America 2006, Brazil Subregion
3119	Friends or Enemies?	166	South America 2006, Brazil Subregion
3226	String's Puzzle	816	South Central China 2007 hosted by NUDT
3227	Mountains	368	South Central China 2007 hosted by NUDT
3228	Gold Transportation	807	South Central China 2007 hosted by NUDT
3229	The Best Travel Design	254	South Central China 2007 hosted by NUDT
3230	Travel	1468	South Central China 2007 hosted by NUDT
3231	FlashGet	338	South Central China 2007 hosted by NUDT
3232	Accelerator	662	South Central China 2007 hosted by NUDT
3585	Accumulation Degree	1194	South Central China 2008 hosted by NUDT
3586	The missionaries and cannibals	59	South Central China 2008 hosted by NUDT
3587	The Biggest Cake	310	South Central China 2008 hosted by NUDT
3588	The Downloading Task	224	South Central China 2008 hosted by NUDT
3589	Number-guessing Game	4454	South Central China 2008 hosted by NUDT
3590	The shuffle Problem	503	South Central China 2008 hosted by NUDT
3591	Ants and Aphides	13	South Central China 2008 hosted by NUDT
3592	Instantaneous Transference	836	South Central China 2008 hosted by NUDT
3593	Sea Base Exploration	186	South Central China 2008 hosted by NUDT
1589	Unix ls	747	South Central USA 1995
1590	Palindromes	1282	South Central USA 1995
1591	M*A*S*H	608	South Central USA 1995
1592	Postscript	70	South Central USA 1995
1593	Radar Scopes	41	South Central USA 1995
1594	Message Routing	50	South Central USA 1995
1595	Prime Cuts	3661	South Central USA 1996
1596	Gears on a Board	35	South Central USA 1996
1597	Uniform Generator	2364	South Central USA 1996
1598	Excuses, Excuses!	1286	South Central USA 1996
1599	Station Balance	181	South Central USA 1996
1600	Centipede Collisions	80	South Central USA 1996
1601	Pizza Anyone?	230	South Central USA 1997
1603	Risk	1245	South Central USA 1997
1604	Just the Facts	4089	South Central USA 1997
1605	Horse Shoe Scoring	27	South Central USA 1997
1606	Jugs	2206	South Central USA 1997
1910	Adam's Genes	26	South Central USA 1997
1076	Bowl	199	South Central USA 1998
1077	Eight	6005	South Central USA 1998
1078	Gizilch	575	South Central USA 1998
1079	Ratio	1241	South Central USA 1998
1081	You Who?	308	South Central USA 1998
1607	Deck	3262	South Central USA 1998
2218	Does This Make Me Look Fat?	997	South Central USA 2001
2219	Manifest Destiny	48	South Central USA 2001
2220	Treasure Hunters	164	South Central USA 2001
2221	Frogger's For Dinner	88	South Central USA 2001
2222	Deeper Blue	155	South Central USA 2001
2223	Get Out 'Da Way!	41	South Central USA 2001
2224	Missing Piece 2001	55	South Central USA 2001
2225	Asteroids!	1027	South Central USA 2001
1298	The Hardest Problem Ever	11898	South Central USA 2002
1299	Polar Explorer	1333	South Central USA 2002
1300	Door Man	1151	South Central USA 2002
1301	The Umbrella Problem: 2054	140	South Central USA 2002
1302	Blue Gene, Jr.	388	South Central USA 2002
1303	Byte Me!	120	South Central USA 2002
1304	World's Worst Bus Schedule	283	South Central USA 2002
2578	Keep on Truckin'	5823	South Central USA 2003
2579	Blurred Vision	1428	South Central USA 2003
2580	The Door/Key Problem	157	South Central USA 2003
2581	Exact Change Only	734	South Central USA 2003
2582	Finding Nemo	219	South Central USA 2003
2583	Series Determination	3966	South Central USA 2003
2584	T-Shirt Gumbo	1220	South Central USA 2003
2585	Window Pains	995	South Central USA 2003
2020	MisLED	162	South Central USA 2004
2021	Relative Relatives	1449	South Central USA 2004
2022	Syntax Included	189	South Central USA 2004
2023	Choose Your Own Adventure	643	South Central USA 2004
2024	Know When to Hold 'em	44	South Central USA 2004
2025	Cubic Rube	55	South Central USA 2004
2026	As the Crow Flies	151	South Central USA 2004
2027	No Brainer	15189	South Central USA 2004
2802	Plinko	222	South Central USA 2005
2803	Defining Moment	678	South Central USA 2005
2804	Jetpack Sniper 3000 Fragfest Extreme	91	South Central USA 2005
2805	Pegs	208	South Central USA 2005
2806	Janken Tactics	36	South Central USA 2005
2807	Bingo!	79	South Central USA 2005
2808	Artificial Strife	134	South Central USA 2005
2809	It's My Derivative	302	South Central USA 2005
3077	Rounders	4432	South Central USA 2006
3078	Q	1121	South Central USA 2006
3079	Enigmatologically Cruciverbalistic	99	South Central USA 2006
3080	Blue Jeans	5420	South Central USA 2006
3081	Core Wars	54	South Central USA 2006
3082	'Roid Rage	239	South Central USA 2006
3083	Children of the Candy Corn	4342	South Central USA 2006
3084	Panic Room	808	South Central USA 2006
1463	Strategic game	2858	Southeastern Europe 2000
1464	Company	33	Southeastern Europe 2000
1465	Multiple	1174	Southeastern Europe 2000
1466	Girls and Boys	3785	Southeastern Europe 2000
1467	Symbolic Derivation	57	Southeastern Europe 2000
1468	Rectangles	1133	Southeastern Europe 2000
1469	COURSES	6666	Southeastern Europe 2000
1470	Closest Common Ancestors	3313	Southeastern Europe 2000
1276	Cash Machine	8824	Southeastern Europe 2002
1277	Beer Land	271	Southeastern Europe 2002
1278	BOAT	126	Southeastern Europe 2002
1279	Art Gallery	1749	Southeastern Europe 2002
1280	Game	154	Southeastern Europe 2002
1281	MANAGER	948	Southeastern Europe 2002
1287	Networking	4114	Southeastern Europe 2002
1288	Sly Number	121	Southeastern Europe 2002
1453	Delta Encoding and Decoding	193	Southeastern Europe 2003
1455	Crazy tea party	4588	Southeastern Europe 2003
1456	Supermarket	4613	Southeastern Europe 2003
1457	Lord of the Ring	142	Southeastern Europe 2003
1458	Common Subsequence	17566	Southeastern Europe 2003
1459	Power Network	6083	Southeastern Europe 2003
1460	Firefighters	240	Southeastern Europe 2003
1461	Binary Polynomials	117	Southeastern Europe 2003
1961	Period	6549	Southeastern Europe 2004
1962	Corporative Network	1020	Southeastern Europe 2004
1963	Cave Exploration	66	Southeastern Europe 2004
1964	City Game	1581	Southeastern Europe 2004
1965	Cube Root	267	Southeastern Europe 2004
1966	Cable TV Network	1626	Southeastern Europe 2004
1967	Alibaba	81	Southeastern Europe 2004
1968	Booklets	250	Southeastern Europe 2004
1969	Count on Canton	5000	Southeastern Europe 2004
2674	Linear world	760	Southeastern Europe 2005
2675	Songs	648	Southeastern Europe 2005
2676	Sudoku	7475	Southeastern Europe 2005
2677	Tour	1472	Southeastern Europe 2005
2678	Mothy	109	Southeastern Europe 2005
2679	Adventurous Driving	332	Southeastern Europe 2005
2680	Computer Transformation	1359	Southeastern Europe 2005
2681	Anagrammatic Distance	1999	Southeastern Europe 2005
2682	Tomato Automata	41	Southeastern Europe 2005
3061	Subsequence	9133	Southeastern Europe 2006
3062	Celebrity jeopardy	7480	Southeastern Europe 2006
3063	Sherlock Holmes	167	Southeastern Europe 2006
3064	Payment System	49	Southeastern Europe 2006
3065	Stargates	248	Southeastern Europe 2006
3066	Maximum	394	Southeastern Europe 2006
3067	Japan	4765	Southeastern Europe 2006
3068	"Shortest" pair of paths	739	Southeastern Europe 2006
3076	Sudoku	1204	Southeastern Europe 2006
3480	John	1349	Southeastern Europe 2007
3481	Double Queue	3623	Southeastern Europe 2007
3482	‘JBC’	194	Southeastern Europe 2007
3483	Loan Scheduling	385	Southeastern Europe 2007
3484	Showstopper	567	Southeastern Europe 2007
3485	Highway	415	Southeastern Europe 2007
3486	Computers	727	Southeastern Europe 2007
3487	The Stable Marriage Problem	3260	Southeastern Europe 2007
3488	Arne Saknussemm	641	Southeastern Europe 2007
3903	Stock Exchange	2102	Southeastern European Regional Programming Contest 2008
3904	Sky Code	877	Southeastern European Regional Programming Contest 2008
3905	Perfect Election	390	Southeastern European Regional Programming Contest 2008
3906	Lucky cities	64	Southeastern European Regional Programming Contest 2008
3907	Build Your Home	498	Southeastern European Regional Programming Contest 2008
3908	Quick answer	205	Southeastern European Regional Programming Contest 2008
3909	Lucky numbers	189	Southeastern European Regional Programming Contest 2008
3910	GCD Determinant	231	Southeastern European Regional Programming Contest 2008
3911	Internet Service Providers	275	Southeastern European Regional Programming Contest 2008
3892	RSA Factorization	95	Southeastern European Regional Programming Contest 2009
3893	Hard-working Student	143	Southeastern European Regional Programming Contest 2009
3894	System Engineer	159	Southeastern European Regional Programming Contest 2009
3895	Cycles of Lanes	431	Southeastern European Regional Programming Contest 2009
3896	Multiprocessor Scheduling	41	Southeastern European Regional Programming Contest 2009
3897	Maze Stretching	215	Southeastern European Regional Programming Contest 2009
3898	Software Industry Revolution	86	Southeastern European Regional Programming Contest 2009
3899	The Lucky Numbers	80	Southeastern European Regional Programming Contest 2009
3900	The Robbery	202	Southeastern European Regional Programming Contest 2009
3901	The Computer Game	30	Southeastern European Regional Programming Contest 2009
3902	The Bad Number	97	Southeastern European Regional Programming Contest 2009
1125	Stockbroker Grapevine	15013	Southern African 2001
1128	Frame Stacking	1514	Southern African 2001
1129	Channel Allocation	6495	Southern African 2001
1130	Alien Security	856	Southern African 2001
1131	Octal Fractions	3295	Southern African 2001
1329	Circle Through Three Points	1294	Southern California 1989,UVA 190
1198	Solitaire	829	Southwestern Europe 2002
1199	Left labyrinths	110	Southwestern Europe 2002
1200	Crazy Search	4712	Southwestern Europe 2002
1201	Intervals	7237	Southwestern Europe 2002
1202	Family	110	Southwestern Europe 2002
1203	Timetable	98	Southwestern Europe 2002
1204	Word Puzzles	2400	Southwestern Europe 2002
1205	Water Treatment Plants	492	Southwestern Europe 2002
1206	Servers	110	Southwestern Europe 2002
2781	The mysterious X network	626	Southwestern Europe 2005
2782	Bin Packing	1872	Southwestern Europe 2005
2783	On Storing Clothes	116	Southwestern Europe 2005
2784	Buy or Build	454	Southwestern Europe 2005
2785	4 Values whose Sum is 0	6098	Southwestern Europe 2005
2786	Keep the Customer Satisfied	340	Southwestern Europe 2005
2787	UFO Cubes in Roswell	19	Southwestern Europe 2005
2788	Black Box	93	Southwestern Europe 2005
2789	Pixel Shuffle	131	Southwestern Europe 2005
2790	Consecutive ones	296	Southwestern Europe 2005
1256	Anagram	7400	Southwestern European Regional Contest 1995
1272	Synchronous Design	65	Southwestern European Regional Contest 1995
1347	Triangle	60	Southwestern European Regional Contest 1995
1410	Intersection	2735	Southwestern European Regional Contest 1995
1419	Graph Coloring	1700	Southwestern European Regional Contest 1995
1420	Spreadsheet	297	Southwestern European Regional Contest 1995
1421	Peter's Calculator	71	Southwestern European Regional Contest 1995
1015	Jury Compromise	5810	Southwestern European Regional Contest 1996
1132	Border	1649	Southwestern European Regional Contest 1996
1133	Stars	143	Southwestern European Regional Contest 1996
1134	Hexagon	202	Southwestern European Regional Contest 1996
1135	Domino Effect	1796	Southwestern European Regional Contest 1996
1136	Pendulum	76	Southwestern European Regional Contest 1996
1137	The New Villa	371	Southwestern European Regional Contest 1996
1138	Ships	89	Southwestern European Regional Contest 1996
1471	Triangles	637	Southwestern European Regional Contest 1997
1472	Instant Complexity	687	Southwestern European Regional Contest 1997
1473	There's Treasure Everywhere!	769	Southwestern European Regional Contest 1997
1474	Video Surveillance	1307	Southwestern European Regional Contest 1997
1475	Pushing Boxes	1764	Southwestern European Regional Contest 1997
1476	Always On the Run	352	Southwestern European Regional Contest 1997
1477	Box of Bricks	7738	Southwestern European Regional Contest 1997
1478	Island of Logic	190	Southwestern European Regional Contest 1997
1479	MBone	38	Southwestern European Regional Contest 1997
1263	Reflections	413	Southwestern European Regional Contest 1998
1480	Optimal Programs	306	Southwestern European Regional Contest 1998
1481	The Die Is Cast	400	Southwestern European Regional Contest 1998
1482	It's not a Bug, It's a Feature!	372	Southwestern European Regional Contest 1998
1483	Going in Circles on Alpha Centauri	38	Southwestern European Regional Contest 1998
1484	Blowing Fuses	1419	Southwestern European Regional Contest 1998
1485	Fast Food	1255	Southwestern European Regional Contest 1998
1486	Sorting Slides	1388	Southwestern European Regional Contest 1998
1487	Single-Player Games	260	Southwestern European Regional Contest 1998
2951	Cake Cutting	570	Stanford Local 2004
2952	Election	415	Stanford Local 2004
2953	Nash Equilibrium	265	Stanford Local 2004
2954	Triangle	2026	Stanford Local 2004
2955	Brackets	3647	Stanford Local 2004
2956	Repeatless Numbers	668	Stanford Local 2004
2957	Planet Hunting	200	Stanford Local 2004
2973	Scrabble	975	Stanford Local 2005
2974	Convex area	181	Stanford Local 2005
2975	Nim	2321	Stanford Local 2005
2976	Dropping tests	4208	Stanford Local 2005
2977	Box walking	502	Stanford Local 2005
2978	Colored stones	642	Stanford Local 2005
2979	RSI	140	Stanford Local 2005
2980	Do it!	330	Stanford Local 2005
3069	Saruman's Army	6700	Stanford Local 2006
3070	Fibonacci	9867	Stanford Local 2006
3071	Football	2292	Stanford Local 2006
3072	Robot	425	Stanford Local 2006
3073	Spam	522	Stanford Local 2006
3074	Sudoku	1902	Stanford Local 2006
3075	Tic-Tac-Toe	745	Stanford Local 2006
3020	Antenna Placement	3713	Svenskt Mästerskap i Programmering/Norgesmesterskapet 2001
3021	e-Coins	304	Svenskt Mästerskap i Programmering/Norgesmesterskapet 2001
3022	The Uxuhul Voting System	151	Svenskt Mästerskap i Programmering/Norgesmesterskapet 2001
3023	Submarines	145	Svenskt Mästerskap i Programmering/Norgesmesterskapet 2001
3024	The Gossiping System	113	Svenskt Mästerskap i Programmering/Norgesmesterskapet 2001
3025	Rings	352	Svenskt Mästerskap i Programmering/Norgesmesterskapet 2001
3026	Borg Maze	3213	Svenskt Mästerskap i Programmering/Norgesmesterskapet 2001
3027	Base equality	498	Svenskt Mästerskap i Programmering/Norgesmesterskapet 2001
2904	The Mailboxes Manufacturers Problem	667	Svenskt Mästerskap i Programmering/Norgesmesterskapet 2002
2905	Parallel Computer Simulator	50	Svenskt Mästerskap i Programmering/Norgesmesterskapet 2002
2906	Moving Pianos	295	Svenskt Mästerskap i Programmering/Norgesmesterskapet 2002
2907	Collecting Beepers	1186	Svenskt Mästerskap i Programmering/Norgesmesterskapet 2002
2908	Quantum	545	Svenskt Mästerskap i Programmering/Norgesmesterskapet 2002
2909	Goldbach's Conjecture	5418	Svenskt Mästerskap i Programmering/Norgesmesterskapet 2002
2910	Downpayment	29	Svenskt Mästerskap i Programmering/Norgesmesterskapet 2002
2911	Simplified λ-evaluations	44	Svenskt Mästerskap i Programmering/Norgesmesterskapet 2002
2998	Hardware	339	Svenskt Mästerskap i Programmering/Norgesmesterskapet 2003
3000	Frogger	195	Svenskt Mästerskap i Programmering/Norgesmesterskapet 2003
3001	Gallup	214	Svenskt Mästerskap i Programmering/Norgesmesterskapet 2003
3002	Jackpot	1290	Svenskt Mästerskap i Programmering/Norgesmesterskapet 2003
3003	Spiderman’s workout	580	Svenskt Mästerskap i Programmering/Norgesmesterskapet 2003
3004	Subway planning	262	Svenskt Mästerskap i Programmering/Norgesmesterskapet 2003
3005	Exploding CPU	155	Svenskt Mästerskap i Programmering/Norgesmesterskapet 2003
2958	Pizza delivery	500	Svenskt Mästerskap i Programmering/Norgesmesterskapet 2004
2959	Ball bearings	1584	Svenskt Mästerskap i Programmering/Norgesmesterskapet 2004
2960	S-Nim	1680	Svenskt Mästerskap i Programmering/Norgesmesterskapet 2004
2961	Sylvester construction	499	Svenskt Mästerskap i Programmering/Norgesmesterskapet 2004
2962	Who owns the Amiga?	33	Svenskt Mästerskap i Programmering/Norgesmesterskapet 2004
2963	Lazy Evaluation	15	Svenskt Mästerskap i Programmering/Norgesmesterskapet 2004
2964	Tourist	429	Svenskt Mästerskap i Programmering/Norgesmesterskapet 2004
2999	Matrix	18	Svenskt Mästerskap i Programmering/Norgesmesterskapet 99
1060	Modular multiplication of polynomials	1843	Taejon 2001
1063	Flip and Shift	3063	Taejon 2001
1065	Wooden Sticks	8294	Taejon 2001
1080	Human Gene Functions	9443	Taejon 2001
1082	Calendar Game	2600	Taejon 2001
1083	Moving Tables	9363	Taejon 2001
1084	Square Destroyer	1770	Taejon 2001
1092	Farmland	351	Taejon 2001
1330	Nearest Common Ancestors	9533	Taejon 2002
1331	Multiply	2789	Taejon 2002
1332	Finding Liars	354	Taejon 2002
1333	Christmas Gifts	49	Taejon 2002
1334	Two Mountaineers	143	Taejon 2002
1335	Digital Onion	105	Taejon 2002
1336	The K-League	192	Taejon 2002
1337	A Lazy Worker	317	Taejon 2002
1377	Good Approximation Problem	170	Taiwan 2001
1378	Power Cable Problem	152	Taiwan 2001
1387	The Constraint Densest Submatrix	216	Taiwan 2001
1388	Hinge Node Problem	238	Taiwan 2001
1389	Area of Simple Polygons	1329	Taiwan 2001
1339	poker card game	259	Taiwan 2002
1340	The Longest Detour Problem	156	Taiwan 2002
1341	The Strongest Subchains	125	Taiwan 2002
1342	Tag Trees	73	Taiwan 2002
1343	Rooted Trees Isomorphism	120	Taiwan 2002
1344	Tree Size Problem	198	Taiwan 2002
2694	A Simple Poker Game	607	Taiwan 2004
2695	Rick the Persistent Gnu	250	Taiwan 2004
2696	A Mysterious Function	2468	Taiwan 2004
2697	A Board Game	266	Taiwan 2004
2698	Servicing DVD Requests	394	Taiwan 2004
2699	The Maximum Number of Strong Kings	721	Taiwan 2004
2700	Space Travel	74	Taiwan 2004
2701	Lapux the Floating Island	117	Taiwan 2004
2702	Can a Complicated Program Go Wrong?	126	Taiwan 2004
2703	Maximum Area Covered by Rectangles	320	Taiwan 2004
1690	(Your)((Term)((Project)))	1109	Tehran 1999
1691	Painting A Board	1471	Tehran 1999
1692	Crossed Matchings	1590	Tehran 1999
1693	Counting Rectangles	541	Tehran 1999
1694	An Old Stone Game	1359	Tehran 1999
1695	Magazine Delivery	971	Tehran 1999
1696	Space Ant	2221	Tehran 1999
1697	The Erythea Campaign	215	Tehran 1999
1275	Cashier Employment	2180	Tehran 2000
1663	Number Steps	6971	Tehran 2000
1683	Puzzlestan	359	Tehran 2000
1684	Dynamic Declaration Language (DDL)	281	Tehran 2000
1685	Color Tunnels	239	Tehran 2000
1686	Lazy Math Instructor	1071	Tehran 2000
1687	Buggy Sat	539	Tehran 2000
1688	Dolphin Pool	159	Tehran 2000
1689	3002 Rubbery	89	Tehran 2000
1068	Parencodings	13186	Tehran 2001
1069	The Bermuda Triangle	491	Tehran 2001
1070	Deformed Wheel	163	Tehran 2001
1071	Illusive Chase	579	Tehran 2001
1072	Puzzle Out	209	Tehran 2001
1073	The Willy Memorial Program	211	Tehran 2001
1074	Parallel Expectations	265	Tehran 2001
1075	University Entrance Examination	244	Tehran 2001
1356	Grandpa's Other Estate	251	Tehran 2002
1357	Afshung Pizza Delivery	54	Tehran 2002
1358	Housing Complexes	124	Tehran 2002
1359	Spacecraft Malfunction	173	Tehran 2002
1360	Blue x Red = Bang	24	Tehran 2002
1361	JaWs	30	Tehran 2002
1362	Skew Binary	375	Tehran 2002
1226	Substrings	3586	Tehran 2002 Preliminary
1227	RoboContest	181	Tehran 2002 Preliminary
1228	Grandpa's Estate	2574	Tehran 2002 Preliminary
1229	Wild Domains	275	Tehran 2002 Preliminary
1230	Pass-Muraille	2308	Tehran 2002 Preliminary
1231	The Alphabet Game	529	Tehran 2002 Preliminary
1232	Microfiches	46	Tehran 2002 Preliminary
1233	Street Crossing	89	Tehran 2002 Preliminary
1018	Communication System	8134	Tehran 2002, First Iran Nationwide Internet Programming Contest
1019	Number Sequence	9510	Tehran 2002, First Iran Nationwide Internet Programming Contest
1020	Anniversary Cake	3839	Tehran 2002, First Iran Nationwide Internet Programming Contest
1021	2D-Nim	1764	Tehran 2002, First Iran Nationwide Internet Programming Contest
1022	Packing Unit 4D Cubes	836	Tehran 2002, First Iran Nationwide Internet Programming Contest
1023	The Fun Number System	3186	Tehran 2002, First Iran Nationwide Internet Programming Contest
1024	Tester Program	928	Tehran 2002, First Iran Nationwide Internet Programming Contest
2290	House Numbers	212	Tehran 2003
2291	Rotten Ropes	3134	Tehran 2003
2292	Optimal Keypad	332	Tehran 2003
2293	Hey, Pay Day!	36	Tehran 2003
2294	Unfoldung	41	Tehran 2003
2295	A DP Problem	984	Tehran 2003
2296	Map Labeler	485	Tehran 2003
2297	Balanced Chemical Equations	75	Tehran 2003
2396	Budget	1740	Tehran 2003 Preliminary
2397	Spiderman	584	Tehran 2003 Preliminary
2398	Toy Storage	2606	Tehran 2003 Preliminary
2399	A Mayor Problem	29	Tehran 2003 Preliminary
2400	Supervisor, Supervisee	569	Tehran 2003 Preliminary
2401	Street Polygon	16	Tehran 2003 Preliminary
2402	Palindrome Numbers	1274	Tehran 2003 Preliminary
2878	IOI Photos	34	Tehran 2004
2879	Vice City	40	Tehran 2004
2880	Fixing Codes	135	Tehran 2004
2881	Wiping Words	134	Tehran 2004
2882	Food Cubes	424	Tehran 2004
2883	Points	221	Tehran 2004
2884	ACM-Telecom	23	Tehran 2004
2885	Prince of Persia	25	Tehran 2004
2894	Ancient Keyboard	1478	Tehran 2005
2895	Best SMS to Type	1479	Tehran 2005
2896	Changing Phone Numbers	134	Tehran 2005
2897	Dramatic Multiplications	891	Tehran 2005
2898	Entertainment	330	Tehran 2005
2899	Fortune at El Dorado	200	Tehran 2005
2900	Griddy Hobby	171	Tehran 2005
2901	Hotel	219	Tehran 2005
2902	Intercepting Missiles	65	Tehran 2005
2903	Joy of Mobile Routing	52	Tehran 2005
3339	Team Arrangement	551	Tehran 2006
3340	Barbara Bennett's Wild Numbers	978	Tehran 2006
3341	Calculating Taxi Fare	125	Tehran 2006
3342	Party at Hali-Bula	1700	Tehran 2006
3343	Against Mammoths	375	Tehran 2006
3344	Chessboard Dance	469	Tehran 2006
3345	Bribing FIPA	1052	Tehran 2006
3346	Treasure of the Chimp Island	251	Tehran 2006
3347	Kadj Squares	968	Tehran 2006
3331	The Idiot of the Year Contest!	1766	Tehran 2006 Preliminary
3332	Parsing Real Numbers	821	Tehran 2006 Preliminary
3333	Co-workers from Hell	240	Tehran 2006 Preliminary
3334	Connected Gheeves	262	Tehran 2006 Preliminary
3335	Rotating Scoreboard	1801	Tehran 2006 Preliminary
3336	ACM Underground	80	Tehran 2006 Preliminary
3337	Expression Evaluator	515	Tehran 2006 Preliminary
3338	Rectangle Cutting	749	Tehran 2006 Preliminary
3852	String LD	581	Tehran 2009
3853	Painting	70	Tehran 2009
3854	Another Brick in the Wall	82	Tehran 2009
3855	Blast the Enemy!	115	Tehran 2009
3856	deltree	54	Tehran 2009
3857	Solar Eclipse	30	Tehran 2009
3858	Hurry Plotter	51	Tehran 2009
3859	ACM Coalition	55	Tehran 2009
3860	Fruit Weights	70	Tehran 2009
3861	Royal Gems	26	Tehran 2009
1970	The Game	1355	Tehran Sharif 2004 Preliminary
1971	Parallelogram Counting	1239	Tehran Sharif 2004 Preliminary
1972	Dice Stacking	763	Tehran Sharif 2004 Preliminary
1973	Software Company	315	Tehran Sharif 2004 Preliminary
1974	The Happy Worm	777	Tehran Sharif 2004 Preliminary
1975	Median Weight Bead	1306	Tehran Sharif 2004 Preliminary
1976	A Mini Locomotive	1605	Tehran Sharif 2004 Preliminary
1977	Odd Loving Bakers	405	Tehran Sharif 2004 Preliminary
1531	Trooper of Bam	4	Tehran Sharif Local Contest 2001
1532	Mixed Numbers	55	Tehran Sharif Local Contest 2001
1533	Mystery	43	Tehran Sharif Local Contest 2001
1534	Terrorist Attack	28	Tehran Sharif Local Contest 2001
1535	Forgetful	136	Tehran Sharif Local Contest 2001
1536	Trains	17	Tehran Sharif Local Contest 2001
3052	Geodes	40	The 2006 Benelux Algorithm Programming Contest
3053	Bowling	186	The 2006 Benelux Algorithm Programming Contest
3054	High Spies	33	The 2006 Benelux Algorithm Programming Contest
3055	Digital Friends	490	The 2006 Benelux Algorithm Programming Contest
3056	The Bavarian Beer Party	284	The 2006 Benelux Algorithm Programming Contest
3057	Evacuation	700	The 2006 Benelux Algorithm Programming Contest
3058	Decompression	197	The 2006 Benelux Algorithm Programming Contest
3059	Rummikub	60	The 2006 Benelux Algorithm Programming Contest
3060	Make it Manhattan	397	The 2006 Benelux Algorithm Programming Contest
1913	Cocktails	77	TUD Programming Contest 2001, Darmstadt, Germany
1914	Cramer's Rule	627	TUD Programming Contest 2001, Darmstadt, Germany
1915	Knight Moves	7911	TUD Programming Contest 2001, Darmstadt, Germany
1916	Rat Attack	294	TUD Programming Contest 2001, Darmstadt, Germany
1917	Automatic Poetry	1073	TUD Programming Contest 2001, Darmstadt, Germany
1918	Ranking List	417	TUD Programming Contest 2001, Darmstadt, Germany
1919	Ship Journey	39	TUD Programming Contest 2001, Darmstadt, Germany
1953	World Cup Noise	8711	TUD Programming Contest 2002, Darmstadt, Germany
1954	Warez Test	17	TUD Programming Contest 2002, Darmstadt, Germany
1955	Rubik's Cube	300	TUD Programming Contest 2002, Darmstadt, Germany
1956	Pumps and Pipes	46	TUD Programming Contest 2002, Darmstadt, Germany
1958	Strange Towers of Hanoi	2345	TUD Programming Contest 2002, Darmstadt, Germany
1959	Darts	714	TUD Programming Contest 2002, Darmstadt, Germany
1960	Time Planner	131	TUD Programming Contest 2002, Darmstadt, Germany
1802	Ancient Plates	38	TUD Programming Contest 2003, Darmstadt, Germany
1803	Box Art	91	TUD Programming Contest 2003, Darmstadt, Germany
1804	Brainman	4988	TUD Programming Contest 2003, Darmstadt, Germany
1805	Friends	135	TUD Programming Contest 2003, Darmstadt, Germany
1806	Manhattan 2025	1000	TUD Programming Contest 2003, Darmstadt, Germany
1807	Mayan Dates	42	TUD Programming Contest 2003, Darmstadt, Germany
1808	Quadratic Residues	440	TUD Programming Contest 2003, Darmstadt, Germany
1809	Regetni	520	TUD Programming Contest 2003, Darmstadt, Germany
1794	Castle Walls	529	TUD Programming Contest 2004, Darmstadt, Germany
1795	DNA Laboratory	366	TUD Programming Contest 2004, Darmstadt, Germany
1796	Extra Terrestrial PISA Test	108	TUD Programming Contest 2004, Darmstadt, Germany
1797	Heavy Transportation	6211	TUD Programming Contest 2004, Darmstadt, Germany
1798	Dory's Phonebook	44	TUD Programming Contest 2004, Darmstadt, Germany
1799	Yeehaa!	5466	TUD Programming Contest 2004, Darmstadt, Germany
1800	Magic Trick	150	TUD Programming Contest 2004, Darmstadt, Germany
1801	Formula Racing	74	TUD Programming Contest 2004, Darmstadt, Germany
2496	Military Recruit	480	TUD Programming Contest 2005 (Training Session), Darmstadt, Germany
2497	Strategies	1143	TUD Programming Contest 2005 (Training Session), Darmstadt, Germany
2498	StuPId	3205	TUD Programming Contest 2005 (Training Session), Darmstadt, Germany
2499	Binary Tree	3008	TUD Programming Contest 2005 (Training Session), Darmstadt, Germany
2500	Pia's Party	238	TUD Programming Contest 2005 (Training Session), Darmstadt, Germany
2487	Stamps	3276	TUD Programming Contest 2005, Darmstadt, Germany
2488	A Knight's Journey	12740	TUD Programming Contest 2005, Darmstadt, Germany
2489	Line Segments	182	TUD Programming Contest 2005, Darmstadt, Germany
2490	Pimp My Ride	379	TUD Programming Contest 2005, Darmstadt, Germany
2491	Scavenger Hunt	1281	TUD Programming Contest 2005, Darmstadt, Germany
2492	A Bug's Life	7590	TUD Programming Contest 2005, Darmstadt, Germany
2493	Rdeaalbe	354	TUD Programming Contest 2005, Darmstadt, Germany
2494	Acid Text	140	TUD Programming Contest 2005, Darmstadt, Germany
2495	Incomplete chess boards	1305	TUD Programming Contest 2005, Darmstadt, Germany
2917	Diophantus of Alexandria	1062	TUD Programming Contest 2006, Darmstadt, Germany
2918	Tudoku	1272	TUD Programming Contest 2006, Darmstadt, Germany
2919	Traveling Queen Problem	77	TUD Programming Contest 2006, Darmstadt, Germany
2920	Mine Map	410	TUD Programming Contest 2006, Darmstadt, Germany
2921	Knights of the Round Table	265	TUD Programming Contest 2006, Darmstadt, Germany
2922	Honeymoon Hike	657	TUD Programming Contest 2006, Darmstadt, Germany
2923	Relocation	792	TUD Programming Contest 2006, Darmstadt, Germany
2924	Gauß in Elementary School	3809	TUD Programming Contest 2006, Darmstadt, Germany
2925	Kick-Tipp	162	TUD Programming Contest 2006, Darmstadt, Germany
2617	Taxes	28	Ural Collegiate Programming Contest 1998
2618	Cube in Labyrinth	130	Ural Collegiate Programming Contest 1998
2619	Delta-wave	708	Ural Collegiate Programming Contest 1998
2620	Minimal coverage	593	Ural Collegiate Programming Contest 1998
2621	Parallelepiped	46	Ural Collegiate Programming Contest 1998
2622	Convex hull	69	Ural Collegiate Programming Contest 1998
2623	Sequence Median	3215	Ural Collegiate Programming Contest 1998
1257	Cross-stitch.	113	Ural Collegiate Programming Contest 1999
2352	Stars	11770	Ural Collegiate Programming Contest 1999
2353	Ministry	1127	Ural Collegiate Programming Contest 1999
2354	Titanic	449	Ural Collegiate Programming Contest 1999
2355	Railway tickets	765	Ural Collegiate Programming Contest 1999
2356	Find a multiple	2781	Ural Collegiate Programming Contest 1999
2357	Labyrinth	291	Ural Collegiate Programming Contest 1999
2358	Queens in peaceful positions	315	Ural Collegiate Programming Contest 1999
2359	Questions	509	Ural Collegiate Programming Contest 1999,trial tour
2599	A funny game	581	Ural State University collegiate programming contest 2000
2600	Geometrical dreams	248	Ural State University collegiate programming contest 2000
2601	Simple calculations	2936	Ural State University collegiate programming contest 2000
2602	Superlong sums	4408	Ural State University collegiate programming contest 2000
2603	Brave balloonists	1795	Ural State University collegiate programming contest 2000
2604	Preparing an article	108	Ural State University collegiate programming contest 2000
2605	Simple game on a grid	416	Ural State University collegiate programming contest 2000
2606	Rabbit hunt	3322	Ural State University collegiate programming contest 2000
2365	Rope	2100	Ural State University Internal Contest October'2000 Junior Session
2366	Sacrament of the sum	2392	Ural State University Internal Contest October'2000 Junior Session
2367	Genealogical tree	3894	Ural State University Internal Contest October'2000 Junior Session
2368	Buttons	814	Ural State University Internal Contest October'2000 Junior Session
2369	Permutations	1382	Ural State University Internal Contest October'2000 Junior Session
2370	Democracy in danger	2262	Ural State University Internal Contest October'2000 Junior Session
2371	Questions and answers	4618	Ural State University Internal Contest October'2000 Junior Session
2372	D++ Again	148	Ural State University Internal Contest October'2000 Junior Session
2340	Memory management	171	Ural State University Internal Contest October'2000 Students Session
2341	Spell checker	228	Ural State University Internal Contest October'2000 Students Session
2342	Anniversary party	4190	Ural State University Internal Contest October'2000 Students Session
2343	Airline company	106	Ural State University Internal Contest October'2000 Students Session
2344	Nikifor	79	Ural State University Internal Contest October'2000 Students Session
2345	Central heating	310	Ural State University Internal Contest October'2000 Students Session
2346	Lucky tickets	1819	Ural State University Internal Contest October'2000 Students Session
1266	Cover an Arc.	250	Ural State University Internal Contest October'2000 Students Session (URAL 1043)
2188	Cow Laundry	784	USACO 2003 Fall Orange
2189	Romeo Meets Juliet	606	USACO 2003 Fall Orange
2190	ISBN	4957	USACO 2003 Fall Orange
2132	Cow Math	519	USACO 2003 February Green
2133	Cow Imposters	407	USACO 2003 February Green
2134	Traffic Lights	131	USACO 2003 February Green
2135	Farm Tour	3978	USACO 2003 February Green
2136	Vertical Histogram	8207	USACO 2003 February Orange
2137	Cowties	891	USACO 2003 February Orange
2138	Travel Games	1166	USACO 2003 February Orange
2018	Best Cow Fences	3006	USACO 2003 March Green
2019	Cornfields	2543	USACO 2003 March Green
2139	Six Degrees of Cowvin Bacon	3210	USACO 2003 March Orange
2140	Herd Sums	8599	USACO 2003 March Orange
2141	Message Decowding	6356	USACO 2003 March Orange
2110	Mountain Walking	1160	USACO 2003 U S Open
2111	Millenium Leapcow	602	USACO 2003 U S Open
2112	Optimal Milking	3349	USACO 2003 U S Open
2180	Bale Figures	348	USACO 2003 U S Open Orange
2181	Jumping Cows	3358	USACO 2003 U S Open Orange
2182	Lost Cows	5923	USACO 2003 U S Open Orange
2183	Bovine Math Geniuses	1483	USACO 2003 U S Open Orange
2008	Moo University - Team Tryouts	681	USACO 2004 March Green
2009	Moo University - Emergency Pizza Order	206	USACO 2004 March Green
2010	Moo University - Financial Aid	2229	USACO 2004 March Green
2385	Apple Catching	5008	USACO 2004 November
2386	Lake Counting	15883	USACO 2004 November
2387	Til the Cows Come Home	10459	USACO 2004 November
2388	Who's in the Middle	17681	USACO 2004 November
2389	Bull Math	7965	USACO 2004 November
2390	Bank Interest	8256	USACO 2004 November
1988	Cube Stacking	6164	USACO 2004 U S Open
1989	The Cow Lineup	2492	USACO 2004 U S Open
1990	MooFest	3105	USACO 2004 U S Open
1991	Turning in Homework	403	USACO 2004 U S Open
3174	Alignment of the Planets	757	USACO 2005 December Bronze
3175	Finding Bovine Roots	696	USACO 2005 December Bronze
3176	Cow Bowling	10781	USACO 2005 December Bronze
2226	Muddy Fields	3034	USACO 2005 January Gold
2227	The Wedding Juicer	1173	USACO 2005 January Gold
2228	Naptime	2083	USACO 2005 January Gold
2229	Sumsets	6021	USACO 2005 January Silver
2230	Watchcow	2473	USACO 2005 January Silver
2231	Moo Volume	4730	USACO 2005 January Silver
3049	Securing the Barn	1206	USACO 2005 November Bronze
3050	Hopscotch	2784	USACO 2005 November Bronze
3051	Satellite Photographs	2201	USACO 2005 November Bronze
3041	Asteroids	9701	USACO 2005 November Gold
3042	Grazing on the Run	773	USACO 2005 November Gold
3043	Walk the Talk	203	USACO 2005 November Gold
3044	City Skyline	1349	USACO 2005 November Silver
3045	Cow Acrobats	1987	USACO 2005 November Silver
3046	Ant Counting	1887	USACO 2005 November Silver
3047	Bovine Birthday	885	USACO 2005 October Bronze
3048	Max Factor	2207	USACO 2005 October Bronze
2430	Lazy Cows	772	USACO 2005 U S Open Gold
2431	Expedition	4889	USACO 2005 U S Open Gold
2432	Around the world	329	USACO 2005 U S Open Gold
2433	Landscaping	378	USACO 2005 U S Open Gold
2434	Waves	187	USACO 2005 U S Open Silver
2435	Navigating the City	481	USACO 2005 U S Open Silver
2436	Disease Management	1467	USACO 2005 U S Open Silver
2437	Muddy roads	1139	USACO 2005 U S Open Silver
3173	Parkside's Triangle	4373	USACO 2006 December Bronze
3191	The Moronic Cowmpouter	1485	USACO 2006 February Bronze
3192	DNA Assembly	766	USACO 2006 February Bronze
3193	Cow Phrasebook	843	USACO 2006 February Bronze
3183	Stump Removal	1467	USACO 2006 January Bronze
3184	Finicky Grazers	372	USACO 2006 January Bronze
3185	The Water Bowls	2036	USACO 2006 January Bronze
3177	Redundant Paths	3896	USACO 2006 January Gold
3178	Roping the Field	229	USACO 2006 January Gold
3179	Corral the Cows	614	USACO 2006 January Gold
3180	The Cow Prom	1145	USACO 2006 January Silver
3181	Dollar Dayz	2215	USACO 2006 January Silver
3182	The Grove	394	USACO 2006 January Silver
3253	Fence Repair	13568	USACO 2006 November Gold
3254	Corn Fields	5879	USACO 2006 November Gold
3255	Roadblocks	4624	USACO 2006 November Gold
3250	Bad Hair Day	5231	USACO 2006 November Silver
3251	Big Square	695	USACO 2006 November Silver
3252	Round Numbers	4103	USACO 2006 November Silver
3627	Bookshelf	4140	USACO 2007 December Bronze
3628	Bookshelf 2	3076	USACO 2007 December Bronze
3629	Card Stacking	1885	USACO 2007 December Bronze
3265	Problem Solving	604	USACO 2007 January Gold
3266	Cow School	208	USACO 2007 January Gold
3262	Protecting the Flowers	4603	USACO 2007 January Silver
3263	Tallest Cow	1942	USACO 2007 January Silver
3264	Balanced Lineup	13399	USACO 2007 January Silver
3618	Exploration	1830	USACO 2007 November Bronze
3619	Speed Reading	3597	USACO 2007 November Bronze
3620	Avoid The Lakes	3472	USACO 2007 November Bronze
3612	Telephone Wire	829	USACO 2007 November Gold
3613	Cow Relays	2177	USACO 2007 November Gold
3614	Sunscreen	3047	USACO 2007 November Gold
3615	Cow Hurdles	2514	USACO 2007 November Silver
3616	Milking Time	5031	USACO 2007 November Silver
3617	Best Cow Line	7109	USACO 2007 November Silver
3280	Cheapest Palindrome	4292	USACO 2007 Open Gold
3281	Dining	4889	USACO 2007 Open Gold
3277	City Horizon	3073	USACO 2007 Open Silver
3278	Catch That Cow	20043	USACO 2007 Open Silver
3279	Fliptile	3233	USACO 2007 Open Silver
3671	Dining Cows	2595	USACO 2008 February Bronze
3672	Long Distance Racing	3683	USACO 2008 February Bronze
3673	Cow Multiplication	7499	USACO 2008 February Bronze
3663	Costume Party	4637	USACO 2008 January Bronze
3664	Election Time	3870	USACO 2008 January Bronze
3665	iCow	1966	USACO 2008 January Bronze
3658	Artificial Lake	470	USACO 2008 January Gold
3657	Haybale Guessing	443	USACO 2008 January Gold
3659	Cell Phone Network	1832	USACO 2008 January Gold
3660	Cow Contest	5525	USACO 2008 January Silver
3661	Running	2011	USACO 2008 January Silver
3662	Telephone Lines	2285	USACO 2008 January Silver
3282	Ferry Loading IV	753	Waterloo Local Contest, 2006.5.27
3283	Card Hands	558	Waterloo Local Contest, 2006.5.27
3284	Eventually periodic sequence	130	Waterloo Local Contest, 2006.5.27
3285	Point of view in Flatland	130	Waterloo Local Contest, 2006.5.27
3286	How many 0's?	1382	Waterloo Local Contest, 2006.5.27
3287	The Trip, 2007	392	Waterloo Local Contest, 2006.9.24
3288	Mall Mania	255	Waterloo Local Contest, 2006.9.24
3289	Moonshine	73	Waterloo Local Contest, 2006.9.24
3290	WFF 'N PROOF	350	Waterloo Local Contest, 2006.9.24
3291	Cousins	210	Waterloo Local Contest, 2006.9.24
3292	Semi-prime H-numbers	3404	Waterloo Local Contest, 2006.9.30
3293	Rectilinear polygon	195	Waterloo Local Contest, 2006.9.30
3294	Life Forms	2329	Waterloo Local Contest, 2006.9.30
3295	Tautology	5369	Waterloo Local Contest, 2006.9.30
3296	Rinse	180	Waterloo Local Contest, 2006.9.30
3297	Open Source	609	Waterloo Local Contest, 2007.7.14
3298	Antimonotonicity	1003	Waterloo Local Contest, 2007.7.14
3299	Humidex	7040	Waterloo Local Contest, 2007.7.14
3300	Tour de France	1850	Waterloo Local Contest, 2007.7.14
3301	Texas Trip	1072	Waterloo Local Contest, 2007.7.14
3639	Exchange Rates	763	Waterloo Local Contest, 2007.9.23
3640	Conformity	766	Waterloo Local Contest, 2007.9.23
3641	Pseudoprime numbers	3215	Waterloo Local Contest, 2007.9.23
3642	Carpool	124	Waterloo Local Contest, 2007.9.23
3643	Friend or Foe?	191	Waterloo Local Contest, 2007.9.23
3644	Gangs	120	Waterloo Local Contest, 2007.9.29
3645	Smeech	559	Waterloo Local Contest, 2007.9.29
3646	The Dragon of Loowater	1499	Waterloo Local Contest, 2007.9.29
3647	Tournament	103	Waterloo Local Contest, 2007.9.29
3648	Wedding	1696	Waterloo Local Contest, 2007.9.29
1886	Borrowers	285	World Finals 1994
1887	Testing the CATCHER	4449	World Finals 1994
1888	Crossword Answers	486	World Finals 1994
1889	Package Pricing	34	World Finals 1994
1890	Switching Channels	165	World Finals 1994
1891	Typesetting	24	World Finals 1994
1892	VTAS - Vessel Traffic Advisory Service	4	World Finals 1994
1893	Monitoring Wheelchair Patients	53	World Finals 1994
1878	Jill's Bike	283	World Finals 1995
1879	Tempus et mobilius Time and motion	421	World Finals 1995
1880	Variable Radix Huffman Encoding	171	World Finals 1995
1881	Sail Race	20	World Finals 1995
1882	Stamps	431	World Finals 1995
1883	Theseus and the Minotaur	27	World Finals 1995
1884	Train Time	35	World Finals 1995
1885	Uncompress	255	World Finals 1995
1870	Bee Breeding	593	World Finals 1999
1871	Bullet Hole	18	World Finals 1999
1872	A Dicey Problem	230	World Finals 1999
1873	The Fortified Forest	1260	World Finals 1999
1874	Trade on Verweggistan	418	World Finals 1999
1875	Robot	33	World Finals 1999
1876	The Letter Carrier's Rounds	84	World Finals 1999
1877	Flooded!	1318	World Finals 1999
1286	Necklace of Beads	3018	Xi'an 2002
1348	Computing	229	Xi'an 2002
1349	Coding of Permutations	360	Xi'an 2002
1350	Cabric Number Problem	2830	Xi'an 2002
1351	Number of Locks	614	Xi'an 2002
1352	Quantity of White Mice	134	Xi'an 2002
1353	Color Change of Go Game Pieces	296	Xi'an 2002
1354	Placement of Keys	749	Xi'an 2002
1355	Selecting the Optimal Teaching Fiends	110	Xi'an 2002

Total 2449 Problems match!

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