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ID	Title	Solved	Source
3690	Constellations	693	2008 Asia Hefei Regional Contest Online by USTC
3691	DNA repair	1935	2008 Asia Hefei Regional Contest Online by USTC
3692	Kindergarten	2613	2008 Asia Hefei Regional Contest Online by USTC
3693	Maximum repetition substring	1505	2008 Asia Hefei Regional Contest Online by USTC
3694	Network	1955	2008 Asia Hefei Regional Contest Online by USTC
3695	Rectangles	638	2008 Asia Hefei Regional Contest Online by USTC
3696	The Luckiest number	1235	2008 Asia Hefei Regional Contest Online by USTC
3697	USTC campus network	745	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	162	2009 ACM ICPC Southeast USA Regional Programming Contest
3815	The Ninja Way	129	2009 ACM ICPC Southeast USA Regional Programming Contest
3816	Pool Table	46	2009 ACM ICPC Southeast USA Regional Programming Contest
3817	Robot Challenge	196	2009 ACM ICPC Southeast USA Regional Programming Contest
3818	Mosaic	92	2009 ACM ICPC Southeast USA Regional Programming Contest
3842	An Industrial Spy	390	2009 ACM North Western European Regional Contest
3843	Common Subexpression Elimination	32	2009 ACM North Western European Regional Contest
3844	Divisible Subsequences	547	2009 ACM North Western European Regional Contest
3845	Fractal	97	2009 ACM North Western European Regional Contest
3846	Mountain Road	102	2009 ACM North Western European Regional Contest
3847	Moving to Nuremberg	112	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	117	2009 ACM North Western European Regional Contest
3851	Wormholes	32	2009 ACM North Western European Regional Contest
3822	Cover Up	23	2009 East Central North America
3823	Decompressing in a GIF	45	2009 East Central North America
3824	Flipper	69	2009 East Central North America
3825	Here's a Product Which Will Make You Tensor	22	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	81	2009 Rocky Mountain
3820	XML	157	2009 Rocky Mountain
3821	Clickomania	93	2009 Rocky Mountain
3873	Trick or Treat	135	2009 South Western European Regional Contest
3874	Working at the Restaurant	89	2009 South Western European Regional Contest
3875	Lights	56	2009 South Western European Regional Contest
3876	Darts	37	2009 South Western European Regional Contest
3877	Genetics	9	2009 South Western European Regional Contest
3878	Haunted Graveyard	97	2009 South Western European Regional Contest
3879	Slalom	39	2009 South Western European Regional Contest
3880	Routing	21	2009 South Western European Regional Contest
3881	Happy Telephones	153	2009 South Western European Regional Contest
3882	Stammering Aliens	168	2009 South Western European Regional Contest
3771	World Islands	129	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	75	2010 National Programming Invitational Contest Host by ZSTU
3775	Chase	44	2010 National Programming Invitational Contest Host by ZSTU
3776	Passing the Message	116	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	4	2010 National Programming Invitational Contest Host by ZSTU
2522	Partitioning for fun and profit	245	Alberta Collegiate Programming Contest 2003.10.18
2523	ASCII Labyrinth	85	Alberta Collegiate Programming Contest 2003.10.18
2524	Ubiquitous Religions	10446	Alberta Collegiate Programming Contest 2003.10.18
2525	Text Formalization	176	Alberta Collegiate Programming Contest 2003.10.18
2526	Center of symmetry	880	Alberta Collegiate Programming Contest 2003.10.18
2527	Polynomial Remains	688	Alberta Collegiate Programming Contest 2003.10.18
2528	Mayor's posters	8959	Alberta Collegiate Programming Contest 2003.10.18
2529	Queuing at the doctors	120	Alberta Collegiate Programming Contest 2003.10.18
3302	Subsequence	4442	Amirkabir University of Technology Local Contest 2006
3303	Halls	292	Amirkabir University of Technology Local Contest 2006
3304	Segments	2975	Amirkabir University of Technology Local Contest 2006
3305	Surveillance	67	Amirkabir University of Technology Local Contest 2006
3306	Busy Airport	129	Amirkabir University of Technology Local Contest 2006
3307	Smart Sister	705	Amirkabir University of Technology Local Contest 2006
3308	Paratroopers	1631	Amirkabir University of Technology Local Contest 2006
3309	Unlucky Luke!	99	Amirkabir University of Technology Local Contest 2006
3991	Seinfeld	426	anarc 2009
3992	Tiles of Tetris, NOT!	213	anarc 2009
3993	Not So Flat After All	174	anarc 2009
3994	Probability One	1147	anarc 2009
3995	Hop — Don’t Walk!	88	anarc 2009
3996	Air Strike	139	anarc 2009
3997	Stock Chase	149	anarc 2009
3998	Land Division	71	anarc 2009
3999	Kind of a Blur	119	anarc 2009
4000	National Treasures	158	anarc 2009
3507	Judging Olympia	3426	Arab and North Africa 2007
3508	Hide That Number	1126	Arab and North Africa 2007
3509	Rotating Rings	489	Arab and North Africa 2007
3510	A Tale from the Dark Side of the Moon	581	Arab and North Africa 2007
3511	Fermat's Christmas Theorem	1222	Arab and North Africa 2007
3512	Incidental Points	597	Arab and North Africa 2007
3513	Let's Go to the Movies	269	Arab and North Africa 2007
3514	The Writers' Club	95	Arab and North Africa 2007
3515	Moving Sticks	42	Arab and North Africa 2007
3516	Johnny Hates Math	167	Arab and North Africa 2007
1770	Special Experiment	518	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	3464	Asia Guangzhou 2003
1776	Task Sequences	483	Asia Guangzhou 2003
1777	Vivian's Problem	258	Asia Guangzhou 2003
1609	Tiling Up Blocks	1752	Asia Kaohsiung 2003
1610	Quad Trees	431	Asia Kaohsiung 2003
1611	The Suspects	11573	Asia Kaohsiung 2003
1612	The Geodetic Set Problem	205	Asia Kaohsiung 2003
1613	Cave Raider	248	Asia Kaohsiung 2003
1614	Space AI Bombs	55	Asia Kaohsiung 2003
1615	Merging Sequences Problem	71	Asia Kaohsiung 2003
1616	Harmonic Periods	95	Asia Kaohsiung 2003
3940	Grey Area	126	Asia Regional Contest, Aizu, 2008
3941	Expected Allowance	110	Asia Regional Contest, Aizu, 2008
3942	Stopped Watches	52	Asia Regional Contest, Aizu, 2008
3943	Digits on the Floor	36	Asia Regional Contest, Aizu, 2008
3944	Spherical Mirrors	53	Asia Regional Contest, Aizu, 2008
3945	Traveling Cube	41	Asia Regional Contest, Aizu, 2008
3946	Search of Concatenated Strings	48	Asia Regional Contest, Aizu, 2008
3947	Top Spinning	17	Asia Regional Contest, Aizu, 2008
3948	Common Polynomial	21	Asia Regional Contest, Aizu, 2008
3949	Zigzag	16	Asia Regional Contest, Aizu, 2008
2912	Rochambeau	987	Baidu Star 2006 Preliminary Chen, Shixi (xreborner) living in http://fairyair.yeah.net/
2915	Zuma	87	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	58	Baidu Star 2006 Semifinal Liu, Rujia (Originator) Chen, Shixi (Solution and test cases)
2914	Minimum Cut	2486	Baidu Star 2006 Semifinal Wang, Ying (Originator) Chen, Shixi (Test cases)
3455	Cheesy Chess	137	BAPC 2006 Qualification
3456	Frobenius	405	BAPC 2006 Qualification
3457	Mineshaft	10	BAPC 2006 Qualification
3458	Colour Sequence	719	BAPC 2006 Qualification
3459	Projects	298	BAPC 2006 Qualification
3460	Booksort	663	BAPC 2006 Qualification
3461	Oulipo	10352	BAPC 2006 Qualification
3462	Lucky Light	314	BAPC 2006 Qualification
3463	Sightseeing	2391	BAPC 2006 Qualification
1322	Chocolate	1772	Beijing 2002
1323	Game Prediction	4321	Beijing 2002
1324	Holedox Moving	2122	Beijing 2002
1325	Machine Schedule	5352	Beijing 2002
1326	Mileage Bank	5163	Beijing 2002
1327	Moving Object Recognition	217	Beijing 2002
1328	Radar Installation	18385	Beijing 2002
1462	Random Walk	106	Beijing 2002
2049	Finding Nemo	2529	Beijing 2004
2050	Searching the Web	286	Beijing 2004
2051	Argus	3617	Beijing 2004
2052	Fun Game	190	Beijing 2004
2053	Square	180	Beijing 2004
2054	Color a Tree	1963	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	6827	Beijing 2004 Preliminary@POJ
1923	Fourier's Lines	637	Beijing 2004 Preliminary@POJ
1924	The Treasure	286	Beijing 2004 Preliminary@POJ
1925	Spiderman	979	Beijing 2004 Preliminary@POJ
1926	Pollution	871	Beijing 2004 Preliminary@POJ
1927	Area in Triangle	730	Beijing 2004 Preliminary@POJ
1928	The Peanuts	2741	Beijing 2004 Preliminary@POJ
2722	Angle and Squares	722	Beijing 2005
2723	Get Luffy Out	2029	Beijing 2005
2724	Purifying Machine	1067	Beijing 2005
2725	Finding Treasure	201	Beijing 2005
2726	Holiday Hotel	2590	Beijing 2005
2727	Special Judge	80	Beijing 2005
2728	Desert King	3582	Beijing 2005
2729	Robocode	193	Beijing 2005
2730	F1 Circuit Design	40	Beijing 2005
2668	Defending Castle	833	Beijing 2005 Preliminary Author:nealzane
2665	Trees	6210	Beijing 2005 Preliminary
2666	Back to Mother Ship	712	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	342	Beijing 2005 Preliminary
2672	Hotkeys	173	Beijing 2005 Preliminary
2673	Kicc Wants to Move a Mountain!	1040	Beijing 2005 Preliminary
3921	Destroying the bus stations	424	Beijing 2008
3922	A simple stone game	254	Beijing 2008
3923	Ugly Windows	404	Beijing 2008
3924	Tornado	66	Beijing 2008
3925	Minimal Ratio Tree	381	Beijing 2008
3926	Parade	188	Beijing 2008
3927	Priest John's Busiest Day	193	Beijing 2008
3928	Ping pong	867	Beijing 2008
3929	Timer	68	Beijing 2008
3930	Elevator	50	Beijing 2008
1008	Maya Calendar	21458	Central Europe 1995
1011	Sticks	19538	Central Europe 1995
1012	Joseph	17422	Central Europe 1995
1025	Department	480	Central Europe 1995
1026	Cipher	4464	Central Europe 1995
1039	Pipe	2378	Central Europe 1995
1040	Transportation	1502	Central Europe 1995
1041	John's trip	2199	Central Europe 1995
1017	Packets	16341	Central Europe 1996
1144	Network	4662	Central Europe 1996
1371	Tin Cutter	208	Central Europe 1996
1372	FORCAL	70	Central Europe 1996
1373	L-system	83	Central Europe 1996
1374	Crosswords	152	Central Europe 1996
1375	Intervals	944	Central Europe 1996
1376	Robot	2064	Central Europe 1996
1363	Rails	9701	Central Europe 1997
1364	King	2987	Central Europe 1997
1365	Prime Land	1427	Central Europe 1997
1366	Word	195	Central Europe 1997
1367	Time	160	Central Europe 1997
1368	Puzzle	114	Central Europe 1997
1369	Append	92	Central Europe 1997
1370	Gossiping	169	Central Europe 1997
1504	Adding Reversed Numbers	8318	Central Europe 1998
1505	Copying Books	1869	Central Europe 1998
1506	Substitution Cipher	130	Central Europe 1998
1507	Commedia dell' arte	139	Central Europe 1998
1508	Skyscraper Floors	111	Central Europe 1998
1509	Glass Beads	1873	Central Europe 1998
1510	Hares and Foxes	44	Central Europe 1998
1511	Invitation Cards	4477	Central Europe 1998
1379	Run Away	1109	Central Europe 1999
1380	Equipment Box	744	Central Europe 1999
1381	Secret Code	177	Central Europe 1999
1382	The Proper Key	146	Central Europe 1999
1383	Labyrinth	1127	Central Europe 1999
1384	Piggy-Bank	5066	Central Europe 1999
1385	Lifting the Stone	796	Central Europe 1999
1386	Play on Words	2933	Central Europe 1999
1396	Simple Arithmetics	390	Central Europe 2000
1397	The Bulk	76	Central Europe 2000
1398	Complete the sequence!	405	Central Europe 2000
1399	Direct Visibility	88	Central Europe 2000
1400	Complicated Expressions	430	Central Europe 2000
1401	Factorial	8221	Central Europe 2000
1402	The Game of Master-Mind	76	Central Europe 2000
1403	Hotline	94	Central Europe 2000
1404	I-Keyboard	780	Central Europe 2000
1429	Alice and Bob	189	Central Europe 2001
1430	Binary Stirling Numbers	628	Central Europe 2001
1431	Calendar of Maya	82	Central Europe 2001
1432	Decoding Morse Sequences	471	Central Europe 2001
1433	Exchanges	172	Central Europe 2001
1434	Fill the Cisterns!	758	Central Europe 2001
1435	Gates	92	Central Europe 2001
1436	Horizontally Visible Segments	951	Central Europe 2001
1438	One-way Traffic	197	Central Europe 2002
1439	Rhombs	55	Central Europe 2002
1440	Varacious Steve	179	Central Europe 2002
1761	Easy Task	387	Central Europe 2003
1762	Bundling	34	Central Europe 2003
1763	Shortcut	411	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	145	Central Europe 2003
1769	Minimizing maximizer	1383	Central Europe 2003
2942	Knights of the Round Table	2288	Central Europe 2005
2943	The Cow Doctor	443	Central Europe 2005
2944	Wild West	203	Central Europe 2005
2945	Find the Clones	2118	Central Europe 2005
2946	The Warehouse	243	Central Europe 2005
2947	Widget Factory	1268	Central Europe 2005
2948	Martian Mining	1331	Central Europe 2005
2949	Word Rings	731	Central Europe 2005
2950	Nuclear Plants	22	Central Europe 2005
1149	PIGS	5622	Croatia OI 2002 Final Exam - First day
1153	SAFE	201	Croatia OI 2002 Final Exam - First day
1155	TELE	1746	Croatia OI 2002 Final Exam - Second Day
2657	Comfort	799	Croatia OI 2002 National – Juniors
2659	Bomb Game	581	Croatia OI 2002 National – Juniors
1849	Two	697	Croatia OI 2002 national – second day, seniors
1847	Tram	3623	Croatia OI 2002 Regional - Juniors
1154	LETTERS	2576	Croatia OI 2002 Regional Competition - Juniors
2658	Song	413	Croatia OI 2002 Regional – Juniors
1992	Jack	891	CTU Open 1999
1993	Caleidoscope	251	CTU Open 1999
1994	Logic	16	CTU Open 1999
1995	Raising Modulo Numbers	6115	CTU Open 1999
1996	The Highest Profits	251	CTU Open 1999
1997	Word Puzzle	113	CTU Open 1999
1998	Lloyd Fifteen Puzzle	193	CTU Open 1999
1999	Quorf	87	CTU Open 1999
1856	Sea Battle	757	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	948	CTU Open 2003
1788	Building a New Depot	764	CTU Open 2003
1789	Truck History	7867	CTU Open 2003
1790	Base Numbers	229	CTU Open 2003
1791	Paper Cutting	369	CTU Open 2003
1792	Hexagonal Routes	159	CTU Open 2003
1793	Storehouse	72	CTU Open 2003
2113	Agents	78	CTU Open 2004
2114	Boatherds	603	CTU Open 2004
2115	C Looooops	5082	CTU Open 2004
2116	Death to Binary?	492	CTU Open 2004
2117	Electricity	1182	CTU Open 2004
2118	Firepersons	331	CTU Open 2004
2119	God of the Vile Baskers	109	CTU Open 2004
2120	Herbalists	31	CTU Open 2004
2122	Japan Plotter Driver	243	CTU Open 2004
2121	Inglish-Number Translator	2393	CTU Open 2004,UVA 486
2989	All Friends	486	CTU Open 2005
2990	Board Game	57	CTU Open 2005
2991	Crane	1284	CTU Open 2005
2992	Divisors	1979	CTU Open 2005
2993	Emag eht htiw Em Pleh	2194	CTU Open 2005
2994	Failing Roads	166	CTU Open 2005
2995	Go Endgame	78	CTU Open 2005
2996	Help Me with the Game	2661	CTU Open 2005
2997	IVXLCDM	175	CTU Open 2005
3446	Catch the Bus!	51	CTU Open 2007
3447	Calendar of Events	74	CTU Open 2007
3448	Roman Expressions	214	CTU Open 2007
3449	Geometric Shapes	529	CTU Open 2007
3450	Corporate Identity	1536	CTU Open 2007
3451	Money Money Money, Must Be Funny	108	CTU Open 2007
3452	Railway Transportation	329	CTU Open 2007
3453	Soccer Tournament	142	CTU Open 2007
3454	Hypertheseus	126	CTU Open 2007
1857	To Europe! To Europe!	314	ČVUT FEL++ 2003,Original From Asia 1999
1207	The 3n + 1 problem	15255	Duke Internet Programming Contest 1990,uva 100
1208	The Blocks Problem	3378	Duke Internet Programming Contest 1990,uva 101
1238	Arbitrage	194	Duke Internet Programming Contest 1990,uva 104
1305	Fermat vs. Pythagoras	810	Duke Internet Programming Contest 1991,UVA 106
1289	The Cat in the Hat	493	Duke Internet Programming Contest 1991,UVA 107
1264	SCUD Busters	304	Duke Internet Programming Contest 1991,UVA 109
1145	Tree Summing	1290	Duke Internet Programming Contest 1992,UVA 112
1216	Simulation Wizardry	167	Duke Internet Programming Contest 1992,UVA 114
1237	The Postal Worker Rings Once	415	Duke Internet Programming Contest 1992,UVA 117
1319	Pipe Fitters	672	Duke Internet Programming Contest 1993,UVA 121
1270	Following Orders	1918	Duke Internet Programming Contest 1993,uva 124
1001	Exponentiation	35096	East Central North America 1988
1118	Lining Up	5281	East Central North America 1994
1126	Simply Syntax	2092	East Central North America 1994
1127	Jack Straws	1622	East Central North America 1994
1139	Cat and Mouse	296	East Central North America 1994
1140	Expanding Fractions	1183	East Central North America 1994
1488	TEX Quotes	4481	East Central North America 1994
1489	Egyptian Multiplication	232	East Central North America 1994
1490	Cabinets	55	East Central North America 1994
1491	Pi	2513	East Central North America 1995
1492	Up and Down Sequences	415	East Central North America 1995
1493	Machined Surfaces	2026	East Central North America 1995
1494	Sunrise	119	East Central North America 1995
1495	LED Test	160	East Central North America 1995
1496	Word Index	2603	East Central North America 1995
1497	Molecules	93	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	472	East Central North America 1996
1502	MPI Maelstrom	4356	East Central North America 1996
1503	Integer Inquiry	10458	East Central North America 1996
1007	DNA Sorting	35200	East Central North America 1998
1013	Counterfeit Dollar	13786	East Central North America 1998
1016	Numbers That Count	6374	East Central North America 1998
1512	Keeps Going and Going and ...	49	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	434	East Central North America 1998
1516	Parallel Deadlock	40	East Central North America 1998
1002	487-3279	32707	East Central North America 1999
1006	Biorhythms	35155	East Central North America 1999
1027	The Same Game	1957	East Central North America 1999
1042	Gone Fishing	11227	East Central North America 1999
1066	Treasure Hunt	2146	East Central North America 1999
1085	Triangle War	824	East Central North America 1999
1086	Unscrambling Images	295	East Central North America 1999
1087	A Plug for UNIX	3845	East Central North America 1999
1639	Picnic Planning	2094	East Central North America 2000
1640	Poly-polygonal Numbers	133	East Central North America 2000
1641	Rational Approximation	46	East Central North America 2000
1642	Stacking Cubes	463	East Central North America 2000
1643	Checker's Check	50	East Central North America 2000
1644	To Bet or Not To Bet	445	East Central North America 2000
1645	BSP Trees	86	East Central North America 2000
1646	Double Trouble	173	East Central North America 2000
1028	Web Navigation	13236	East Central North America 2001
1043	What's In A Name?	854	East Central North America 2001
1094	Sorting It All Out	8972	East Central North America 2001
1095	Trees Made to Order	3404	East Central North America 2001
1096	Space Station Shielding	484	East Central North America 2001
1097	Roads Scholar	283	East Central North America 2001
1098	Robots	172	East Central North America 2001
1099	Square Ice	1495	East Central North America 2001
1234	Ball Toss	507	East Central North America 2002
1235	Galactic Breakup	102	East Central North America 2002
1239	Increasing Sequences	853	East Central North America 2002
1240	Pre-Post-erous!	1116	East Central North America 2002
1241	Knockout Tournament	501	East Central North America 2002
1242	Plugged In	173	East Central North America 2002
1243	One Person	1513	East Central North America 2002
1244	Slots of Fun	660	East Central North America 2002
1617	Crypto Columns	1573	East Central North America 2003
1618	Decorations	358	East Central North America 2003
1619	EKG Sequence	259	East Central North America 2003
1620	Phone Home	365	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	164	East Central North America 2003
1624	This Takes the Cake	362	East Central North America 2003
2033	Alphacode	3406	East Central North America 2004
2034	Anti-prime Sequences	1132	East Central North America 2004
2035	Hit or Miss	176	East Central North America 2004
2036	I Conduit!	252	East Central North America 2004
2037	Roll Playing Games	72	East Central North America 2004
2038	Team Rankings	1002	East Central North America 2004
2039	To and Fro	5616	East Central North America 2004
2040	Translations	141	East Central North America 2004
2731	ACM(ACronymMaker)	110	East Central North America 2005
2732	Countdown	346	East Central North America 2005
2733	The Game of Efil	181	East Central North America 2005
2734	Queens, Knights and Pawns	831	East Central North America 2005
2735	Reliable Nets	269	East Central North America 2005
2736	Square Count	194	East Central North America 2005
2737	Swamp Things	346	East Central North America 2005
2738	Two Ends	1014	East Central North America 2005
3310	Caterpillar	975	East Central North America 2006
3311	Hie with the Pie	3139	East Central North America 2006
3312	Mahershalalhashbaz, Nebuchadnezzar, and Billy Bob Benjamin Go to the Regionals	869	East Central North America 2006
3313	The Mastermind Master's Mind	84	East Central North America 2006
3314	Plaque Pack	416	East Central North America 2006
3315	Roofing It	93	East Central North America 2006
3316	Snakes on a Plane	419	East Central North America 2006
3317	Stake Your Claim	313	East Central North America 2006
1517	u Calculate e	9719	Greater New York 2000
1518	Problem Bee	151	Greater New York 2000
1519	Digital Roots	7490	Greater New York 2000
1520	Scramble Sort	1072	Greater New York 2000
1521	Entropy	4261	Greater New York 2000
1522	N-Credible Mazes	283	Greater New York 2000
1523	SPF	3018	Greater New York 2000
1911	A Well-Formed Problem	78	Greater New York 2000
1045	Bode Plot	8869	Greater New York 2001
1046	Color Me Less	15070	Greater New York 2001
1047	Round and Round We Go	5488	Greater New York 2001
1048	Follow My Logic	579	Greater New York 2001
1049	Microprocessor Simulation	777	Greater New York 2001
1050	To the Max	22322	Greater New York 2001
1051	P,MTHBGWB	4487	Greater New York 2001
1052	Plato's Blocks	354	Greater New York 2001
1053	Set Me	1340	Greater New York 2001
1217	FOUR QUARTERS	441	Greater New York 2002
1218	THE DRUNK JAILER	14306	Greater New York 2002
1219	L-I-N-G-O: LINGO	237	Greater New York 2002
1220	NUMBER BASE CONVERSION	2002	Greater New York 2002
1221	UNIMODAL PALINDROMIC DECOMPOSITIONS	2150	Greater New York 2002
1222	EXTENDED LIGHTS OUT	6216	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	3261	Greater New York 2003
1666	Candy Sharing Game	2343	Greater New York 2003
1667	Peg Game	128	Greater New York 2003
1668	Taxation With Representation Overdone	56	Greater New York 2003
1669	It's Logical	138	Greater New York 2003
1670	Obstructed Rook Circuits	42	Greater New York 2003
1671	Rhyme Schemes	831	Greater New York 2003
1672	Fully Diversified Sequences of Sets	183	Greater New York 2003
1673	EXOCENTER OF A TRIANGLE	1001	Greater New York 2003
2272	Bullseye	1921	Greater New York 2004
2273	An Excel-lent Problem	974	Greater New York 2004
2275	Flipping Pancake	572	Greater New York 2004
2276	Model Rocket Height	342	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	987	Greater New York 2004
2845	01000001	2845	Greater New York 2005
2846	The Bank of Kalii	512	Greater New York 2005
2847	The Cubic End	450	Greater New York 2005
2848	Kindergarten Graduation	195	Greater New York 2005
2849	brainf*ck	386	Greater New York 2005
2850	Stacking Cylinders	512	Greater New York 2005
2851	No Fold'em Hold'em	35	Greater New York 2005
2852	Model Rocket Height	84	Greater New York 2005
2853	Sequence Sum Possibilities	3334	Greater New York 2005
3085	Quick Change	3987	Greater New York 2006
3086	Triangular Sums	4620	Greater New York 2006
3087	Shuffle'm Up	3834	Greater New York 2006
3088	Push Botton Lock	795	Greater New York 2006
3089	Sign Message Formatting	20	Greater New York 2006
3090	Visible Lattice Points	3567	Greater New York 2006
3091	Triangular N-Queens Problem	307	Greater New York 2006
3092	Non-divisible 2-3 Power Sums	392	Greater New York 2006
3093	Margaritas on the River Walk	791	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	330	Greater New York Regional 2008
3791	Text Messaging Improvement?	78	Greater New York Regional 2008
3792	Area of Polycubes	117	Greater New York Regional 2008
3793	Joe’s Triangular Gardens	34	Greater New York Regional 2008
3794	Extended Normal Order Sort	89	Greater New York Regional 2008
3795	The Two Note Rag	123	Greater New York Regional 2008
3781	Nth Largest Value	1018	Greater New York Regional 2009
3782	Equal Sum Partitions	520	Greater New York Regional 2009
3783	Balls	1111	Greater New York Regional 2009
3784	Running Median	1336	Greater New York Regional 2009
3785	The Next Permutation	661	Greater New York Regional 2009
3786	Adjacent Bit Counts	370	Greater New York Regional 2009
3787	Convex Hull of Lattice Points	213	Greater New York Regional 2009
3788	Interior Points of Lattice Polygons	113	Greater New York Regional 2009
1091	跳蚤	2514	HNOI 2001
2859	A rectangle	283	Hooyeon Lee (ltdtl@POJ)
2860	Block game with the Little Prince	1146	Hooyeon Lee (ltdtl@POJ)
2861	Cycle with 6 vertices	82	Hooyeon Lee (ltdtl@POJ)
1406	Starship Hakodate-maru	840	Japan 2001
1407	e-Market	133	Japan 2001
1408	Fishnet	1232	Japan 2001
1409	77377	315	Japan 2001
1957	Beehives	100	Japan 2001
2067	Young, Poor and Busy	81	Japan 2001
2068	Nim	916	Japan 2001
2069	Super Star	862	Japan 2001
1411	Calling Extraterrestrial Intelligence Again	2194	Japan 2002 Kanazawa
1412	Equals are Equals	64	Japan 2002 Kanazawa
1413	GIGA Universe Cup	56	Japan 2002 Kanazawa
1414	Life Line	673	Japan 2002 Kanazawa
1415	Map of Ninja House	159	Japan 2002 Kanazawa
1416	Shredding Company	2976	Japan 2002 Kanazawa
1417	True Liars	1159	Japan 2002 Kanazawa
1418	Viva Confetti	298	Japan 2002 Kanazawa
2028	When Can We Meet?	2680	Japan 2003 Domestic
2029	Get Many Persimmon Trees	2377	Japan 2003 Domestic
2030	The Secret Number	619	Japan 2003 Domestic
2031	Building a Space Station	3180	Japan 2003 Domestic
2032	Square Carpets	191	Japan 2003 Domestic
2041	Unreliable Message	1112	Japan 2003,Aizu
2042	Lagrange's Four-Square Theorem	975	Japan 2003,Aizu
2043	Area of Polygons	256	Japan 2003,Aizu
2044	Weather Forecast	573	Japan 2003,Aizu
2045	Molecular Formula	382	Japan 2003,Aizu
2046	Gap	485	Japan 2003,Aizu
2047	Concert Hall Scheduling	461	Japan 2003,Aizu
2048	Monster Trap	146	Japan 2003,Aizu
2142	The Balance	2421	Japan 2004
2143	Make a Sequence	277	Japan 2004
2144	Leaky Cryptography	297	Japan 2004
2145	Pathological Paths	142	Japan 2004
2146	Confusing Login Names	270	Japan 2004
2147	Dice Puzzle	88	Japan 2004
2148	Color the Map	190	Japan 2004
2149	Inherit the Spheres	112	Japan 2004
2150	Crossing Prisms	49	Japan 2004
1978	Hanafuda Shuffle	2002	Japan 2004 Domestic
1979	Red and Black	16767	Japan 2004 Domestic
1980	Unit Fraction Partition	1083	Japan 2004 Domestic
1981	Circle and Points	1403	Japan 2004 Domestic
1982	Water Tank	77	Japan 2004 Domestic
1983	Name the Crossing	94	Japan 2004 Domestic
2739	Sum of Consecutive Prime Numbers	10619	Japan 2005
2740	Book Replacement	304	Japan 2005
2741	Colored Cubes	287	Japan 2005
2742	Organize Your Train	90	Japan 2005
2743	Mobile Computing	163	Japan 2005
2744	Atomic Car Race	474	Japan 2005
2745	Network Mess	184	Japan 2005
2746	Bingo	73	Japan 2005
2747	Shy Polygons	37	Japan 2005
2683	Ohgas' Fortune	615	Japan 2005 Domestic
2684	Polygonal Line Search	610	Japan 2005 Domestic
2685	Numeral System	1580	Japan 2005 Domestic
2686	Traveling by Stagecoach	1343	Japan 2005 Domestic
2687	Earth Observation with a Mobile Robot Team	48	Japan 2005 Domestic
2688	Cleaning Robot	1172	Japan 2005 Domestic
3129	How I Wonder What You Are!	688	Japan 2006
3130	How I Mathematician Wonder What You Are!	1389	Japan 2006
3131	Cubic Eight-Puzzle	266	Japan 2006
3132	Sum of Different Primes	1645	Japan 2006
3133	Manhattan Wiring	602	Japan 2006
3134	Power Calculus	1042	Japan 2006
3135	Polygons on the Grid	105	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	7477	Japan 2006 Domestic
3007	Organize Your Train part II	1597	Japan 2006 Domestic
3008	Hexerpents of Hexwamp	43	Japan 2006 Domestic
3009	Curling 2.0	7936	Japan 2006 Domestic
3010	The Genome Database of All Space Life	184	Japan 2006 Domestic
3011	Secrets in Shadows	44	Japan 2006 Domestic
3517	And Then There Was One	2351	Japan 2007
3518	Prime Gap	4401	Japan 2007
3519	Minimal Backgammon	577	Japan 2007
3520	Lowest Pyramid	49	Japan 2007
3521	Geometric Map	127	Japan 2007
3522	Slim Span	2934	Japan 2007
3523	The Morning after Halloween	357	Japan 2007
3524	Bug Hunt	296	Japan 2007
3525	Most Distant Point from the Sea	1364	Japan 2007
3526	The Teacher’s Side of Math	141	Japan 2007
3325	ICPC Score Totalizer Software	4295	Japan 2007 Domestic
3326	Analyzing Login/Logout Records	632	Japan 2007 Domestic
3327	Cut the Cake	533	Japan 2007 Domestic
3328	Cliff Climbing	544	Japan 2007 Domestic
3329	Twirl Around	34	Japan 2007 Domestic
3330	Dr. Podboq or: How We Became Asymmetric	84	Japan 2007 Domestic
1345	Address Recovery	7	kanpur 2002
1346	Board of Directors Meeting	17	kanpur 2002
3390	Print Words in Lines	730	Kaohsiung 2006
3391	The Bug Sensor Problem	61	Kaohsiung 2006
3392	Pitcher Rotation	112	Kaohsiung 2006
3393	Lucky and Good Months by Gregorian Calendar	570	Kaohsiung 2006
3394	Route Planning	252	Kaohsiung 2006
3395	Shift Cipher	82	Kaohsiung 2006
3396	A Scheduling Problem	60	Kaohsiung 2006
3397	Click the Lines	45	Kaohsiung 2006
3398	Perfect Service	735	Kaohsiung 2006
1829	火力防御网	56	LIANGLIANG@POJ
1830	开关问题	2639	LIANGLIANG@POJ
1737	Connected Graph	1462	LouTiancheng@POJ
1738	An old Stone Game	647	LouTiancheng@POJ
1739	Tony's Tour	890	LouTiancheng@POJ
1740	A New Stone Game	2874	LouTiancheng@POJ
1741	Tree	4913	LouTiancheng@POJ
1742	Coins	7311	LouTiancheng@POJ
1743	Musical Theme	4455	LouTiancheng@POJ
1744	Elevator Stopping Plan	604	LouTiancheng@POJ
3353	Nuevo-Romano	24	Manila 2006
3354	Connect the Dots	13	Manila 2006
3355	Boundary Points	271	Manila 2006
3356	AGTC	3235	Manila 2006
3357	Oreon	412	Manila 2006
3358	Period of an Infinite Binary Expansion	617	Manila 2006
3359	Wordfish	428	Manila 2006
3360	Take a Walk	256	Manila 2006
3361	Gaussian Prime Factors	346	Manila 2006
3362	20-Four	12	Manila 2006
2105	IP Address	9892	México and Central America 2004
2106	Boolean Expressions	1359	México and Central America 2004
2107	Gear Profiles	73	México and Central America 2004
2108	Lazy Pianist	191	México and Central America 2004
2109	Power of Cryptography	10318	México and Central America 2004
1269	Intersecting Lines	4684	Mid-Atlantic 1996
1524	Cowculations	171	Mid-Atlantic 1996
1525	Hi-Q	142	Mid-Atlantic 1996
1526	Call Forwarding	112	Mid-Atlantic 1996
1527	Making the Grade	121	Mid-Atlantic 1996
1528	Perfection	5363	Mid-Atlantic 1996
1529	Shipping Routes	213	Mid-Atlantic 1996
1530	Slurpys	221	Mid-Atlantic 1996
1004	Financial Management	66282	Mid-Atlantic 2001
1005	I Think I Need a Houseboat	44832	Mid-Atlantic 2001
1119	Start Up the Startup	473	Mid-Atlantic 2001
1120	A New Growth Industry	1186	Mid-Atlantic 2001
1121	Algernon's Noxious Emissions	155	Mid-Atlantic 2001
1122	FDNY to the Rescue!	769	Mid-Atlantic 2001
1123	For the Porsche	119	Mid-Atlantic 2001
1124	Oh, Those Achin' Feet	125	Mid-Atlantic 2001
2871	A Simple Question of Chemistry	4352	Mid-Atlantic 2002
2872	Spelling Be	616	Mid-Atlantic 2002
2873	Apply a Cold Compress	127	Mid-Atlantic 2002
2874	A Baron Landscape	80	Mid-Atlantic 2002
2875	In Defence of a Garden	179	Mid-Atlantic 2002
2876	Cantoring Along	1729	Mid-Atlantic 2002
2877	Chambers Ceramic Conundrum	73	Mid-Atlantic 2002
1581	A Contesting Decision	1939	Mid-Atlantic 2003
1582	Which Way Do I Go?	64	Mid-Atlantic 2003
1583	Choose Your Words Carefully	447	Mid-Atlantic 2003
1584	A Round Peg in a Ground Hole	1436	Mid-Atlantic 2003
1585	Helping Florida	93	Mid-Atlantic 2003
1586	Three Sides Make a Triangle	492	Mid-Atlantic 2003
1587	High and Dry	26	Mid-Atlantic 2003
1588	Reverse Roman Notation	218	Mid-Atlantic 2003
2070	Filling Out the Team	5129	Mid-Atlantic 2004
2071	Auctions R Us	124	Mid-Atlantic 2004
2072	GHOST	34	Mid-Atlantic 2004
2073	Doggone Moles	98	Mid-Atlantic 2004
2074	Line of Sight	1023	Mid-Atlantic 2004
2075	Tangled in Cables	1884	Mid-Atlantic 2004
2076	All Roads Lead to Albuquerque, er, Rome	46	Mid-Atlantic 2004
2077	Balanced Budget Initiative	39	Mid-Atlantic 2004
2810	Take Your Vitamins	726	Mid-Atlantic 2005
2811	Packing Dominoes	41	Mid-Atlantic 2005
2812	Extrusion	800	Mid-Atlantic 2005
2813	Pasting Strings	123	Mid-Atlantic 2005
2814	Mobiles	54	Mid-Atlantic 2005
2815	Context-Free Clock	325	Mid-Atlantic 2005
2816	Right-Hand Rule	119	Mid-Atlantic 2005
2817	WordStack	883	Mid-Atlantic 2005
2818	Making Change	739	Mid-Atlantic 2005, Practice Problem
1014	Dividing	12451	Mid-Central European Regional Contest 1999
1044	Date bugs	1210	Mid-Central European Regional Contest 1999
1093	Formatting Text	514	Mid-Central European Regional Contest 1999
1100	Dreisam Equations	403	Mid-Central European Regional Contest 1999
1101	The Game	3157	Mid-Central European Regional Contest 1999
1102	LC-Display	5650	Mid-Central European Regional Contest 1999
1103	Maze	503	Mid-Central European Regional Contest 1999
1104	Robbery	407	Mid-Central European Regional Contest 1999
1105	S-Trees	1085	Mid-Central European Regional Contest 1999
1142	Smith Numbers	3526	Mid-Central European Regional Contest 2000
1143	Number Game	1151	Mid-Central European Regional Contest 2000
1151	Atlantis	5761	Mid-Central European Regional Contest 2000
1391	Erdos Numbers	178	Mid-Central European Regional Contest 2000
1392	Ouroboros Snake	465	Mid-Central European Regional Contest 2000
1393	Fold-up Patterns	18	Mid-Central European Regional Contest 2000
1394	Railroad	236	Mid-Central European Regional Contest 2000
1188	Gleaming the Cubes	715	Mid-Central USA 1993
1541	Dart-a-Mania	74	Mid-Central USA 1993
1542	DNA Translation	71	Mid-Central USA 1995
1543	Perfect Cubes	6753	Mid-Central USA 1995
1544	A Puzzling Problem	129	Mid-Central USA 1995
1545	Galactic Import	169	Mid-Central USA 1995
1546	Basically Speaking	1867	Mid-Central USA 1995
1555	Polynomial Showdown	1467	Mid-Central USA 1996
1556	The Doors	2331	Mid-Central USA 1996
1557	Mapmaker	151	Mid-Central USA 1996
1558	Board Silly	152	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	106	Mid-Central USA 1996
1562	Oil Deposits	6915	Mid-Central USA 1997
1563	The Snail	914	Mid-Central USA 1997
1564	Sum It Up	3437	Mid-Central USA 1997
1565	Skew Binary	6564	Mid-Central USA 1997
1566	Haiku Review	498	Mid-Central USA 1997
1567	WIMP	42	Mid-Central USA 1997
1313	Booklet Printing	1098	Mid-Central USA 1998
1314	Finding Rectangles	629	Mid-Central USA 1998
1315	Don't Get Rooked	1366	Mid-Central USA 1998
1316	Self Numbers	10776	Mid-Central USA 1998
1317	Do the Untwist	1963	Mid-Central USA 1998
1318	Word Amalgamation	3930	Mid-Central USA 1998
1568	Find the Winning Move	439	Mid-Central USA 1999
1569	Myacm Triangles	612	Mid-Central USA 1999
1570	Exchange Rates	176	Mid-Central USA 1999
1571	Loansome Car Buyer	126	Mid-Central USA 1999
1572	Automatic Editing	625	Mid-Central USA 1999
1573	Robot Motion	5624	Mid-Central USA 1999
1009	Edge Detection	4341	Mid-Central USA 2000
1574	The Triangle Game	309	Mid-Central USA 2000
1575	Easier Done Than Said?	2529	Mid-Central USA 2000
1576	Colorville	186	Mid-Central USA 2000
1577	Falling Leaves	2155	Mid-Central USA 2000
1578	Instruens Fabulam	298	Mid-Central USA 2000
1003	Hangover	57770	Mid-Central USA 2001
1106	Transmitters	2447	Mid-Central USA 2001
1107	W's Cipher	2540	Mid-Central USA 2001
1108	Split Windows	176	Mid-Central USA 2001
1109	Index Generation	112	Mid-Central USA 2001
1110	Double Vision	218	Mid-Central USA 2001
1111	Image Perimeters	4416	Mid-Central USA 2001
1245	Programmer, Rank Thyself	431	Mid-Central USA 2002
1246	Hilbert Curve Intersections	62	Mid-Central USA 2002
1247	Magnificent Meatballs	4538	Mid-Central USA 2002
1248	Safecracker	1597	Mid-Central USA 2002
1249	Oil Pipeline	102	Mid-Central USA 2002
1250	Tanning Salon	3957	Mid-Central USA 2002
1251	Jungle Roads	8707	Mid-Central USA 2002
1547	Clay Bully	4439	Mid-Central USA 2003
1548	Robots	1557	Mid-Central USA 2003
1549	Bright Bracelet	133	Mid-Central USA 2003
1550	Treadmill	148	Mid-Central USA 2003
1551	Data Mining?	138	Mid-Central USA 2003
1552	Doubles	10695	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	136	Mid-Central USA 2004
2012	Triangle Cuts	35	Mid-Central USA 2004
2013	Symmetric Order	7614	Mid-Central USA 2004
2014	Flow Layout	2079	Mid-Central USA 2004
2015	Permutation Code	446	Mid-Central USA 2004
2016	Ink Blots	50	Mid-Central USA 2004
2017	Speed Limit	11798	Mid-Central USA 2004
2704	Pascal's Travels	1940	Mid-Central USA 2005
2705	Overflowing Bookshelf	562	Mid-Central USA 2005
2706	Connect	415	Mid-Central USA 2005
2707	Copier Reduction	4091	Mid-Central USA 2005
2708	Time to Graduate	188	Mid-Central USA 2005
2709	Painter	1995	Mid-Central USA 2005
2710	Consecutive Digits	975	Mid-Central USA 2005
2711	Leapin' Lizards	452	Mid-Central USA 2005
2712	Netiquette	453	Mid-Central USA 2005
3094	Quicksum	10053	Mid-Central USA 2006
3095	Linear Pachinko	997	Mid-Central USA 2006
3096	Surprising Strings	3999	Mid-Central USA 2006
3097	Falling Ice	67	Mid-Central USA 2006
3098	Frugal Search	408	Mid-Central USA 2006
3099	Go Go Gorelians	460	Mid-Central USA 2006
3100	Root of the Problem	5890	Mid-Central USA 2006
3649	Typesetting	191	Mid-Central USA 2007
3650	The Seven Percent Solution	4668	Mid-Central USA 2007
3651	Slink	22	Mid-Central USA 2007
3652	Persistent Bits	1164	Mid-Central USA 2007
3653	Here We Go(relians) Again	539	Mid-Central USA 2007
3654	Electronic Document Security	564	Mid-Central USA 2007
3655	Guard	69	Mid-Central USA 2007
3656	Rock Skipping	622	Mid-Central USA 2007
3912	Up and Down	95	Mid-Central USA 2009
3913	Gnome Sequencing	1491	Mid-Central USA 2009
3914	DuLL	217	Mid-Central USA 2009
3915	Black Vienna	52	Mid-Central USA 2009
3916	Duplicate Removal	1262	Mid-Central USA 2009
3917	Rock, Paper, Scissors	947	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	1025	MIT Programming Contest 2005
2927	Constructing Roads	33	MIT Programming Contest 2005
2928	A City of Skyscrapers	320	MIT Programming Contest 2005
2929	The Traveling Salesman	27	MIT Programming Contest 2005
2930	Dialing Dice	39	MIT Programming Contest 2005
2931	Procrastination	137	MIT Programming Contest 2005
2932	Coneology	618	MIT Programming Contest 2005
2933	Explaining the Stock Market	103	MIT Programming Contest 2005
1214	"Accordian" Patience	352	New Zealand 1989,UVA 127
1338	Ugly Numbers	8550	New Zealand 1990 Division I,UVA 136
1320	Street Numbers	1472	New Zealand 1990 Division I,UVA 138
1215	Gondwanaland Telecom	198	New Zealand 1991 Division I,UVA 145
1146	ID Codes	3769	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	175	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	110	Ningbo 2009
3830	Ancient vending machine	40	Ningbo 2009
3831	Open-air shopping malls	136	Ningbo 2009
3832	Posters	149	Ningbo 2009
3833	Hamlet's gambling	22	Ningbo 2009
3834	Graph Game	49	Ningbo 2009
3835	Columbus's bargain	151	Ningbo 2009
3836	P2P File Sharing System	76	Ningbo 2009
1067	取石子游戏	12590	NOI
1182	食物链	14641	Noi 01
1183	反正切函数的应用	4600	Noi 01
1184	聪明的打字员	1286	Noi 01
1185	炮兵阵地	7251	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	2098	Noi 99
1190	生日蛋糕	5693	Noi 99
1191	棋盘分割	4141	Noi 99
1192	最优连通子集	1358	Noi 99
1193	内存分配	543	Noi 99
1283	Moving Computer	896	NOIP 2001
2656	Unhappy Jinjin	7737	NOIP 2004
2632	Crashing Robots	3960	Nordic 2005
2633	Funny Games	142	Nordic 2005
2634	Nullary Computer	76	Nordic 2005
2635	The Embarrassed Cryptographer	2568	Nordic 2005
2636	Electrical Outlets	6406	Nordic 2005
2637	WorstWeather Ever	382	Nordic 2005
2638	Kingdom	100	Nordic 2005
2639	Necklace Decomposition	300	Nordic 2005
2640	Playground	951	Nordic 2005
3028	Shoot-out	211	Nordic 2006
3029	Tour Guide	248	Nordic 2006
3030	Nasty Hacks	8452	Nordic 2006
3031	Jezzball	33	Nordic 2006
3032	Card Trick	2954	Nordic 2006
3033	Traveling Salesman	127	Nordic 2006
3034	Whac-a-Mole	767	Nordic 2006
3035	Random Walking	203	Nordic 2006
3036	Honeycomb Walk	1287	Nordic 2006
3630	Phone List	6094	Nordic 2007
3631	Cuckoo Hashing	328	Nordic 2007
3632	Optimal Parking	4214	Nordic 2007
3633	Copying DNA	169	Nordic 2007
3634	Circle of Debt	74	Nordic 2007
3635	Full Tank?	3075	Nordic 2007
3636	Nested Dolls	1469	Nordic 2007
3637	Shopaholic	2592	Nordic 2007
3638	Moogle	438	Nordic 2007
1454	Factorial Frequencies	1099	North Central North America 1993
1537	Identifying Legal Pascal Real Constants	211	North Central North America 1993
1538	Extrapolation Using a Difference Table	150	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?	7130	North Central North America 1997
1309	Coconuts, Revisited	755	North Central North America 1997
1310	Nonstop Travel	169	North Central North America 1997
1311	Doing Windows	116	North Central North America 1997
1312	Numerically Speaking	591	North Central North America 1997
1441	Table	56	Northeastern Europe 1996
1442	Black Box	3488	Northeastern Europe 1996
1443	DEL command	64	Northeastern Europe 1996
1444	Parallelepiped walk	164	Northeastern Europe 1996
1445	Random number	38	Northeastern Europe 1996
1446	Moscow Time	121	Northeastern Europe 1996
1706	References	566	Northeastern Europe 1997
1707	Sum of powers	356	Northeastern Europe 1997
1708	Game	374	Northeastern Europe 1997
1709	Crossword	198	Northeastern Europe 1997
1710	Magic of David Copperfield	247	Northeastern Europe 1997
1711	Puncher	32	Northeastern Europe 1997
1712	Flying Stars	125	Northeastern Europe 1997
1713	Divide et unita	91	Northeastern Europe 1997
1029	False coin	6237	Northeastern Europe 1998
1030	Rating	390	Northeastern Europe 1998
1031	Fence	1088	Northeastern Europe 1998
1032	Parliament	7172	Northeastern Europe 1998
1033	Defragment	1579	Northeastern Europe 1998
1034	The dog task	1112	Northeastern Europe 1998
1035	Spell checker	7115	Northeastern Europe 1998
1036	Gangsters	2725	Northeastern Europe 1998
1745	Divisibility	2930	Northeastern Europe 1999
1746	Loan	29	Northeastern Europe 1999
1747	Expression	423	Northeastern Europe 1999
1748	Computer Dialogue	94	Northeastern Europe 1999
1749	Lock Manager	155	Northeastern Europe 1999
1750	Dictionary	763	Northeastern Europe 1999
1751	Highways	3416	Northeastern Europe 1999
1752	Advertisement	296	Northeastern Europe 1999
1753	Flip Game	15220	Northeastern Europe 2000
1754	Buffer Manager	351	Northeastern Europe 2000
1755	Triathlon	881	Northeastern Europe 2000
1756	Domino Puzzle	67	Northeastern Europe 2000
1757	Binary Search	310	Northeastern Europe 2000
1758	Frontier	112	Northeastern Europe 2000
1759	Garland	1014	Northeastern Europe 2000
1760	Disk Tree	464	Northeastern Europe 2000
2541	Binary Witch	436	Northeastern Europe 2000, Far-Eastern Subregion
2542	Fool Game	55	Northeastern Europe 2000, Far-Eastern Subregion
2543	Spreadsheet	88	Northeastern Europe 2000, Far-Eastern Subregion
2544	PreQueL	38	Northeastern Europe 2000, Far-Eastern Subregion
2545	Hamming Problem	2471	Northeastern Europe 2000, Far-Eastern Subregion
2546	Circular Area	1948	Northeastern Europe 2000, Far-Eastern Subregion
1064	Cable master	6758	Northeastern Europe 2001
1112	Team Them Up!	1581	Northeastern Europe 2001
1113	Wall	7183	Northeastern Europe 2001
1114	Chemical Reactions	345	Northeastern Europe 2001
1115	Statistical Trouble	72	Northeastern Europe 2001
1116	Library	249	Northeastern Europe 2001
1117	Pairs of Integers	860	Northeastern Europe 2001
1141	Brackets Sequence	5836	Northeastern Europe 2001
1647	One-move checkmate	369	Northeastern Europe 2001, Far-Eastern Subregion
1648	Countryside Highway	357	Northeastern Europe 2001, Far-Eastern Subregion
1649	Market Place	181	Northeastern Europe 2001, Far-Eastern Subregion
1650	Integer Approximation	1519	Northeastern Europe 2001, Far-Eastern Subregion
1651	Multiplication Puzzle	4927	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!	1339	Northeastern Europe 2001, Northern Subregion
1626	Chapayev	64	Northeastern Europe 2001, Northern Subregion
1629	Fillword	634	Northeastern Europe 2001, Northern Subregion
1860	Currency Exchange	8363	Northeastern Europe 2001, Northern Subregion
1861	Network	4004	Northeastern Europe 2001, Northern Subregion
1862	Stripies	6168	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	158	Northeastern Europe 2001, Northern Subregion 2001(URAL 1159)
3399	Product	629	Northeastern Europe 2001, Western Subregion
3400	Dropping the stones	495	Northeastern Europe 2001, Western Subregion
3401	String reduction	349	Northeastern Europe 2001, Western Subregion
3402	Add a queen	240	Northeastern Europe 2001, Western Subregion
3403	"Bloody Mary"	27	Northeastern Europe 2001, Western Subregion
3404	Bridge over a rough river	1547	Northeastern Europe 2001, Western Subregion
3405	Convex hull	69	Northeastern Europe 2001, Western Subregion
3406	Last digit	652	Northeastern Europe 2001, Western Subregion
2171	Amusing Numbers	351	Northeastern Europe 2002
2172	Bricks	299	Northeastern Europe 2002
2173	Cricket Field	296	Northeastern Europe 2002
2174	Decoding Task	411	Northeastern Europe 2002
2175	Evacuation Plan	818	Northeastern Europe 2002
2176	Folding	498	Northeastern Europe 2002
2177	Ghost Busters	71	Northeastern Europe 2002
2178	Heroes Of Might And Magic	166	Northeastern Europe 2002
2179	Inlay Cutters	471	Northeastern Europe 2002
2530	Tetris Alphabet	466	Northeastern Europe 2002, Far-Eastern Subregion
2531	Network Saboteur	4657	Northeastern Europe 2002, Far-Eastern Subregion
2532	Burned Calendar	113	Northeastern Europe 2002, Far-Eastern Subregion
2533	Longest Ordered Subsequence	13941	Northeastern Europe 2002, Far-Eastern Subregion
2534	Falling cards	45	Northeastern Europe 2002, Far-Eastern Subregion
2535	Very Simple Problem	1464	Northeastern Europe 2002, Far-Eastern Subregion
2201	Cartesian Tree	1077	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	183	Northeastern Europe 2002, Northern Subregion
2207	Intuitionistic Logic	20	Northeastern Europe 2002, Northern Subregion
2208	Pyramids	771	Northeastern Europe 2002, Northern Subregion
2209	The King	3538	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	174	Northeastern Europe 2002, Western Subregion
3410	Split convex polygon	136	Northeastern Europe 2002, Western Subregion
3411	Paid Roads	1942	Northeastern Europe 2002, Western Subregion
3412	Ray	319	Northeastern Europe 2002, Western Subregion
3413	RPG	421	Northeastern Europe 2002, Western Subregion
3414	Pots	5447	Northeastern Europe 2002, Western Subregion
1894	Alternative Scale of Notation	644	Northeastern Europe 2003
1895	Bring Them There	138	Northeastern Europe 2003
1896	Code Formatting	389	Northeastern Europe 2003
1897	Data Mining	89	Northeastern Europe 2003
1898	Entropy	130	Northeastern Europe 2003
1899	Farmer Bill's Problem	507	Northeastern Europe 2003
1900	Game	188	Northeastern Europe 2003
1901	Hypertransmission	240	Northeastern Europe 2003
1902	Illumination	29	Northeastern Europe 2003
1903	Jurassic Remains	338	Northeastern Europe 2003
1904	King's Quest	1785	Northeastern Europe 2003
2329	Nearest number - 2	913	Northeastern Europe 2003, Far-Eastern Subregion
2330	Advanced ASCII Cubes	308	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	120	Northeastern Europe 2003, Far-Eastern Subregion
2334	Simple prefix compression	614	Northeastern Europe 2003, Far-Eastern Subregion
1608	Banal Tickets	133	Northeastern Europe 2003, Northern Subregion
1627	Experiment "X": Explosions Expected	57	Northeastern Europe 2003, Northern Subregion
2123	Artinals	16	Northeastern Europe 2003, Northern Subregion
2124	Crankshaft	143	Northeastern Europe 2003, Northern Subregion
2125	Destroying The Graph	1503	Northeastern Europe 2003, Northern Subregion
2126	Factoring a Polynomial	1144	Northeastern Europe 2003, Northern Subregion
2127	Greatest Common Increasing Subsequence	1771	Northeastern Europe 2003, Northern Subregion
2128	Highways	849	Northeastern Europe 2003, Northern Subregion
2129	Invariant Polynomials	106	Northeastern Europe 2003, Northern Subregion
2130	Jogging	27	Northeastern Europe 2003, Northern Subregion
2131	Key Insertion	245	Northeastern Europe 2003, Northern Subregion
3546	Sea battle	373	Northeastern Europe 2003, Western Subregion
3547	Cube evolvent	88	Northeastern Europe 2003, Western Subregion
3548	Restoring the digits	143	Northeastern Europe 2003, Western Subregion
3549	GSM phone	32	Northeastern Europe 2003, Western Subregion
3550	AT – sequence	213	Northeastern Europe 2003, Western Subregion
3551	Putin-chess	23	Northeastern Europe 2003, Western Subregion
3552	Snatch!	57	Northeastern Europe 2003, Western Subregion
3553	Task schedule	205	Northeastern Europe 2003, Western Subregion
3554	Almost the shortest route	184	Northeastern Europe 2003, Western Subregion
2159	Ancient Cipher	9321	Northeastern Europe 2004
2160	Box	1300	Northeastern Europe 2004
2161	Chandelier	324	Northeastern Europe 2004
2162	Document Indexing	135	Northeastern Europe 2004
2163	Easy Trading	874	Northeastern Europe 2004
2164	Find the Border	115	Northeastern Europe 2004
2165	Gunman	348	Northeastern Europe 2004
2166	Heapsort	534	Northeastern Europe 2004
2167	Irrelevant Elements	401	Northeastern Europe 2004
2168	Joke with Turtles	241	Northeastern Europe 2004
2169	Kingdom of Magic	205	Northeastern Europe 2004
2170	Lattice Animals	150	Northeastern Europe 2004
2379	ACM Rank Table	994	Northeastern Europe 2004, Far-Eastern Subregion
2380	Sales Report	402	Northeastern Europe 2004, Far-Eastern Subregion
2381	Random Gap	992	Northeastern Europe 2004, Far-Eastern Subregion
2382	Radio Coverage	152	Northeastern Europe 2004, Far-Eastern Subregion
2383	Circle Drawing	189	Northeastern Europe 2004, Far-Eastern Subregion
2384	Harder Sokoban Problem	256	Northeastern Europe 2004, Far-Eastern Subregion
2094	Angry Teacher	130	Northeastern Europe 2004, Northern Subregion
2095	Beth Tableaux	19	Northeastern Europe 2004, Northern Subregion
2096	Collecting Bugs	2458	Northeastern Europe 2004, Northern Subregion
2097	Drawing Windows	19	Northeastern Europe 2004, Northern Subregion
2098	Ellipse	67	Northeastern Europe 2004, Northern Subregion
2099	Fool's Day	30	Northeastern Europe 2004, Northern Subregion
2100	Graveyard Design	1496	Northeastern Europe 2004, Northern Subregion
2101	Honey and Milk Land	1609	Northeastern Europe 2004, Northern Subregion
2102	Incredible! Impossible!	135	Northeastern Europe 2004, Northern Subregion
2103	Jackpot	151	Northeastern Europe 2004, Northern Subregion
2104	K-th Number	10063	Northeastern Europe 2004, Northern Subregion
2965	The Pilots Brothers' refrigerator	8041	Northeastern Europe 2004, Western Subregion
2966	A safe way	181	Northeastern Europe 2004, Western Subregion
2967	Triangles	606	Northeastern Europe 2004, Western Subregion
2968	Necklace	52	Northeastern Europe 2004, Western Subregion
2969	Divisibility by 15	608	Northeastern Europe 2004, Western Subregion
2970	The lazy programmer	425	Northeastern Europe 2004, Western Subregion
2971	"Switchback"	42	Northeastern Europe 2004, Western Subregion
2972	Laser-Ball	23	Northeastern Europe 2004, Western Subregion
2791	Area 51	181	Northeastern Europe 2005
2792	Brackets Removal	175	Northeastern Europe 2005
2793	Cactus	244	Northeastern Europe 2005
2794	Double Patience	295	Northeastern Europe 2005
2795	Exploring Pyramids	575	Northeastern Europe 2005
2796	Feel Good	3074	Northeastern Europe 2005
2797	Guards	68	Northeastern Europe 2005
2798	Hardwood Cutting	101	Northeastern Europe 2005
2799	IP Networks	738	Northeastern Europe 2005
2800	Joseph's Problem	1128	Northeastern Europe 2005
2801	Knockdown	55	Northeastern Europe 2005
3430	Pizza schedule	136	Northeastern Europe 2005, Far-Eastern Subregion
3431	Texture Tile	274	Northeastern Europe 2005, Far-Eastern Subregion
3432	Count Squares	989	Northeastern Europe 2005, Far-Eastern Subregion
3433	Road Accident	26	Northeastern Europe 2005, Far-Eastern Subregion
3434	Terrarium	183	Northeastern Europe 2005, Far-Eastern Subregion
3435	Sudoku Checker	689	Northeastern Europe 2005, Far-Eastern Subregion
3436	ACM Computer Factory	1860	Northeastern Europe 2005, Far-Eastern Subregion
3101	Astronomy	808	Northeastern Europe 2005, Northern Subregion
3102	Bee Garden	176	Northeastern Europe 2005, Northern Subregion
3103	Cutting a Block	572	Northeastern Europe 2005, Northern Subregion
3104	Drying	3229	Northeastern Europe 2005, Northern Subregion
3105	Expectation	397	Northeastern Europe 2005, Northern Subregion
3106	Flip and Turn	232	Northeastern Europe 2005, Northern Subregion
3107	Godfather	2272	Northeastern Europe 2005, Northern Subregion
3108	Horn Clauses	42	Northeastern Europe 2005, Northern Subregion
3109	Inner Vertices	519	Northeastern Europe 2005, Northern Subregion
3110	Jenny's First Exam	176	Northeastern Europe 2005, Northern Subregion
3111	K Best	1663	Northeastern Europe 2005, Northern Subregion
3555	Cocktail	70	Northeastern Europe 2005, Western Subregion
3556	Increasing subsequences	53	Northeastern Europe 2005, Western Subregion
3557	Map Generator	293	Northeastern Europe 2005, Western Subregion
3558	Map Generator returns (MG-II)	109	Northeastern Europe 2005, Western Subregion
3559	Trigonometric optimization	38	Northeastern Europe 2005, Western Subregion
3560	Supersquare	27	Northeastern Europe 2005, Western Subregion
3561	Pseudographical recognizer	805	Northeastern Europe 2005, Western Subregion
3562	“Roman” corridor	127	Northeastern Europe 2005, Western Subregion
3563	Parabolic teleports	10	Northeastern Europe 2005, Western Subregion
3564	Magic pyramid	14	Northeastern Europe 2005, Western Subregion
3148	ASCII Art	169	Northeastern Europe 2006
3149	Billing Tables	96	Northeastern Europe 2006
3150	Cellular Automaton	907	Northeastern Europe 2006
3151	Driving Directions	40	Northeastern Europe 2006
3152	Exchange	74	Northeastern Europe 2006
3153	Fool's Game	19	Northeastern Europe 2006
3154	Graveyard	661	Northeastern Europe 2006
3155	Hard Life	1290	Northeastern Europe 2006
3156	Interconnect	293	Northeastern Europe 2006
3157	Java vs C++	1813	Northeastern Europe 2006
3158	Kickdown	800	Northeastern Europe 2006
3426	Doors and... more doors	148	Northeastern Europe 2006, Far-Eastern Subregion
3423	Automaton optimization	295	Northeastern Europe 2006, Far-Eastern Subregion
3424	Better security	237	Northeastern Europe 2006, Far-Eastern Subregion
3425	Customer support	1170	Northeastern Europe 2006, Far-Eastern Subregion
3427	Ecology tax	2120	Northeastern Europe 2006, Far-Eastern Subregion
3428	Formatting function	264	Northeastern Europe 2006, Far-Eastern Subregion
3429	Geometry with a ruler	244	Northeastern Europe 2006, Far-Eastern Subregion
3379	Alphabet	106	Northeastern Europe 2006, Northern Subregion
3380	Bridges	395	Northeastern Europe 2006, Northern Subregion
3381	Confectionery	62	Northeastern Europe 2006, Northern Subregion
3382	Deciphering	59	Northeastern Europe 2006, Northern Subregion
3383	Equation	11	Northeastern Europe 2006, Northern Subregion
3384	Feng Shui	1020	Northeastern Europe 2006, Northern Subregion
3385	Genealogy	672	Northeastern Europe 2006, Northern Subregion
3386	Halloween Holidays	1526	Northeastern Europe 2006, Northern Subregion
3387	Ideal Frame	47	Northeastern Europe 2006, Northern Subregion
3388	Japanese Puzzle	391	Northeastern Europe 2006, Northern Subregion
3389	Kennings	64	Northeastern Europe 2006, Northern Subregion
3565	Ants	1370	Northeastern Europe 2007
3566	Building for UN	524	Northeastern Europe 2007
3567	Cactus Reloaded	244	Northeastern Europe 2007
3568	Diver	28	Northeastern Europe 2007
3569	Equation	103	Northeastern Europe 2007
3570	Fund Management	98	Northeastern Europe 2007
3571	Game	85	Northeastern Europe 2007
3572	Hanoi Towers	200	Northeastern Europe 2007
3573	I18n	197	Northeastern Europe 2007
3574	Japanese Writing	88	Northeastern Europe 2007
3575	Kingdom Partitioning	32	Northeastern Europe 2007
3576	Language Recognition	247	Northeastern Europe 2007
3535	A+B	304	Northeastern Europe 2007, Northern Subregion
3536	Beer Refrigerator	1777	Northeastern Europe 2007, Northern Subregion
3537	Crosses and Crosses	1044	Northeastern Europe 2007, Northern Subregion
3538	Domestic Networks	198	Northeastern Europe 2007, Northern Subregion
3539	Elevator	307	Northeastern Europe 2007, Northern Subregion
3540	Formula	21	Northeastern Europe 2007, Northern Subregion
3541	Given a string…	257	Northeastern Europe 2007, Northern Subregion
3542	History of Football	122	Northeastern Europe 2007, Northern Subregion
3543	iChess	958	Northeastern Europe 2007, Northern Subregion
3544	Journey with Pigs	724	Northeastern Europe 2007, Northern Subregion
3545	K’ak’-u-pakal and Mayan Script	27	Northeastern Europe 2007, Northern Subregion
3862	Asteroids	111	Northeastern Europe 2009
3863	Business Center	442	Northeastern Europe 2009
3865	Database	108	Northeastern Europe 2009
3866	Exclusive Access 2	61	Northeastern Europe 2009
3867	Funny Language	65	Northeastern Europe 2009
3868	Garbling Game	40	Northeastern Europe 2009
3869	Headshot	196	Northeastern Europe 2009
3870	Inspection	91	Northeastern Europe 2009
3871	Java Certification	27	Northeastern Europe 2009
3872	K-equivalence	29	Northeastern Europe 2009
3959	Alignment of Code	259	Northeastern Europe 2010
3960	Binary Operation	49	Northeastern Europe 2010
3961	Cactus Revolution	14	Northeastern Europe 2010
3962	Dome of Circus	124	Northeastern Europe 2010
3963	Evacuation Plan	117	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	127	Northeastern Europe 2010
3969	K-Graph Oddity	73	Northeastern Europe 2010
1265	Area	2341	Northwestern Europe 2001
1395	Cog-Wheels	154	Northwestern Europe 2001
1447	Ambiguous Dates	58	Northwestern Europe 2001
1448	Cube	89	Northwestern Europe 2001
1449	Enigma	73	Northwestern Europe 2001
1450	Gridland	3963	Northwestern Europe 2001
1451	T9	1035	Northwestern Europe 2001
1452	Signal Box	23	Northwestern Europe 2001
1252	Euro Efficiency	1230	Northwestern Europe 2002
1253	Markov Trains	55	Northwestern Europe 2002
1254	Hansel and Grethel	909	Northwestern Europe 2002
1255	Floors	170	Northwestern Europe 2002
1259	The Picnic	287	Northwestern Europe 2002
1260	Pearls	4040	Northwestern Europe 2002
1261	Huffman Trees	80	Northwestern Europe 2002
1262	Input	295	Northwestern Europe 2002
1631	Bridging signals	5094	Northwestern Europe 2003
1632	Vase collection	651	Northwestern Europe 2003
1633	Gladiators	223	Northwestern Europe 2003
1634	Who's the boss?	757	Northwestern Europe 2003
1635	Subway tree systems	1966	Northwestern Europe 2003
1636	Prison rearrangement	1937	Northwestern Europe 2003
1637	Sightseeing tour	2531	Northwestern Europe 2003
1638	A number game	91	Northwestern Europe 2003
2058	Word Encoding	110	Northwestern Europe 2004
2059	Watchdog	773	Northwestern Europe 2004
2060	Taxi Cab Scheme	2033	Northwestern Europe 2004
2061	Pseudo-random Numbers	89	Northwestern Europe 2004
2062	Card Game Cheater	770	Northwestern Europe 2004
2063	Investment	2412	Northwestern Europe 2004
2064	Pipes	140	Northwestern Europe 2004
2065	SETI	895	Northwestern Europe 2004
2066	Minimax Triangulation	244	Northwestern Europe 2004
2764	Unequalled Consumption	93	Northwestern Europe 2005
2765	Declaration of Content	111	Northwestern Europe 2005
2766	Laserbox	622	Northwestern Europe 2005
2767	Bowlstack	253	Northwestern Europe 2005
2768	Pesky Heroes	86	Northwestern Europe 2005
2769	Reduced ID Numbers	2623	Northwestern Europe 2005
2770	Tantrix	51	Northwestern Europe 2005
2771	Guardian of Decency	1661	Northwestern Europe 2005
2772	Up the Stairs	593	Northwestern Europe 2005
3120	Sudoku	116	Northwestern Europe 2006
3121	The SetStack Computer	170	Northwestern Europe 2006
3122	Pie	4176	Northwestern Europe 2006
3123	Ticket to Ride	242	Northwestern Europe 2006
3124	The Bookcase	365	Northwestern Europe 2006
3125	Printer Queue	2209	Northwestern Europe 2006
3126	Prime Path	9158	Northwestern Europe 2006
3127	Lineland's Airport	62	Northwestern Europe 2006
3128	Leonardo's Notebook	778	Northwestern Europe 2006
3497	Assemble	783	Northwestern Europe 2007
3498	March of the Penguins	1392	Northwestern Europe 2007
3499	Containers	333	Northwestern Europe 2007
3500	Youth Hostel Dorm	85	Northwestern Europe 2007
3501	Escape from Enemy Territory	485	Northwestern Europe 2007
3502	Flight Safety	92	Northwestern Europe 2007
3503	Summits	311	Northwestern Europe 2007
3504	Obfuscation	346	Northwestern Europe 2007
3505	Tower Parking	995	Northwestern Europe 2007
3506	Walk	121	Northwestern Europe 2007
1271	Nice Milk	220	OIBH Online Programming Contest(OOPC)#1
1010	STAMPS	4375	Pacific Northwest 1998
1055	BULK MAILING	280	Pacific Northwest 1998
1056	IMMEDIATE DECODABILITY	5355	Pacific Northwest 1998
1057	FILE MAPPING	1141	Pacific Northwest 1998
1058	The Gourmet Club	397	Pacific Northwest 1998
1059	Chutes and Ladders	1005	Pacific Northwest 1998
1579	Function Run Fun	8185	Pacific Northwest 1999
1580	String Matching	1872	Pacific Northwest 1999
2191	Mersenne Composite Numbers	880	Pacific Northwest 2004
2192	Zipper	4631	Pacific Northwest 2004
2193	Lenny's Lucky Lotto Lists	795	Pacific Northwest 2004
2194	Stacking Cylinders	586	Pacific Northwest 2004
2195	Going Home	6761	Pacific Northwest 2004
2196	Specialized Four-Digit Numbers	5529	Pacific Northwest 2004
2197	Jill's Tour Paths	360	Pacific Northwest 2004
2198	Boundaries on	56	Pacific Northwest 2004
2199	Rate of Return	336	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	1210	Pacific Northwest 2008
3801	Crazy Circuits	566	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	71	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	442	PKU Campus 2008 (POJ Founder Monthly Contest – 2008.05.10), frkstyc
3598	PopKart	152	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	2631	PKU Campus 2009 (POJ Monthly Contest – 2009.05.17), cyqclark
3739	Special Squares	268	PKU Campus 2009 (POJ Monthly Contest – 2009.05.17), Doraemonok
3735	Training little cats	1954	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	2776	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	206	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	1587	PKU Local 2007 (POJ Monthly--2007.04.28), frkstyc
3223	Football Game	72	PKU Local 2007 (POJ Monthly--2007.04.28), frkstyc, text by Ikki
3224	Go for Lab Cup!	4429	PKU Local 2007 (POJ Monthly--2007.04.28), ideas from ava, text and test cases by frkstyc
3219	Binomial Coefficients	2435	PKU Local 2007 (POJ Monthly--2007.04.28), Ikki
3222	Edge Pairing	313	PKU Local 2007 (POJ Monthly--2007.04.28), ufx
3221	Diamond Puzzle	663	PKU Local 2007 (POJ Monthly--2007.04.28), wenxichang
2424	Flo's Restaurant	755	PKU Monthly,Alcyone
2422	The Wolves and the Sheep	49	PKU Monthly,CHEN Shixi(xreborner)
2425	A Chess Game	1207	PKU Monthly,CHEN Shixi(xreborner)
2423	The Parallel Challenge Ballgame	38	PKU Monthly,daofeng
2421	Constructing Roads	6975	PKU Monthly,kicc
2428	Surface Reconstruction	46	PKU Monthly,kicc
2427	Smith's Problem	253	PKU Monthly,static
2426	Remainder	426	PKU Monthly,Wang Yijie
2482	Stars in Your Window	1973	POJ Contest,Author:kinfkong@ZSU
2483	Greatest Common Subtree	121	POJ Contest,Author:kinfkong@ZSU
2486	Apple Tree	2510	POJ Contest,Author:magicpig@ZSU
2478	Farey Sequence	4147	POJ Contest,Author:Mathematica@ZSU
2479	Maximum sum	9886	POJ Contest,Author:Mathematica@ZSU
2480	Longge's problem	2022	POJ Contest,Author:Mathematica@ZSU
2481	Cows	4082	POJ Contest,Author:Mathematica@ZSU
2484	A Funny Game	3277	POJ Contest,Author:Mathematica@ZSU
2485	Highways	10025	POJ Contest,Author:Mathematica@ZSU
3472	Holey Square Tiling	202	POJ Founder Monthly Contest – 2007.12.30, frkstyc
3473	Stochastic Finite State Automaton	14	POJ Founder Monthly Contest – 2007.12.30, frkstyc
3474	Ellipsoid	15	POJ Founder Monthly Contest – 2007.12.30, frkstyc
3475	Paper-, er, Transcript-Folding Game	690	POJ Founder Monthly Contest – 2007.12.30, frkstyc
3476	A Game with Colored Balls	333	POJ Founder Monthly Contest – 2007.12.30, frkstyc
3477	System of Linear Equations	28	POJ Founder Monthly Contest – 2007.12.30, frkstyc
3478	Undergraduate Instruction Evaluation	24	POJ Founder Monthly Contest – 2007.12.30, frkstyc
3479	RoBa Has a Second Art Gallery!	62	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	253	POJ Founder Monthly Contest – 2008.01.31, xfxyjwf
3490	Jumping Frogs	36	POJ Founder Monthly Contest – 2008.01.31, xfxyjwf
3491	Rotated Sky Charts	20	POJ Founder Monthly Contest – 2008.01.31, xfxyjwf
3492	Knapsack II	287	POJ Founder Monthly Contest – 2008.01.31, xfxyjwf
3494	Largest Submatrix of All 1’s	1879	POJ Founder Monthly Contest – 2008.01.31, xfxyjwf
3532	Resistance	266	POJ Founder Monthly Contest – 2008.03.16, g201513
3533	Light Switching Game	240	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	191	POJ Founder Monthly Contest – 2008.03.16, Gao Yihan
3534	Escape of Life and Death	198	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	571	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	2975	POJ Founder Monthly Contest – 2008.04.13, Lei Tao
3582	Last Hit	6	POJ Founder Monthly Contest – 2008.04.13, TN
3580	SuperMemo	1841	POJ Founder Monthly Contest – 2008.04.13, Yao Jinyu
3581	Sequence	939	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	250	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	1206	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	2626	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	575	POJ Founder Monthly Contest – 2008.07.27, Updog
3680	Intervals	1769	POJ Founder Monthly Contest – 2008.07.27, windy7926778
3681	Finding the Rectangle	703	POJ Founder Monthly Contest – 2008.07.27, windy7926778
3683	Priest John's Busiest Day	2203	POJ Founder Monthly Contest – 2008.08.31, Dagger and Facer
3688	Cheat in the Game	336	POJ Founder Monthly Contest – 2008.08.31, facer
3689	Equations	71	POJ Founder Monthly Contest – 2008.08.31, Lei, Tao
3684	Physics Experiment	1044	POJ Founder Monthly Contest – 2008.08.31, Simon
3682	King Arthur's Birthday Celebration	818	POJ Founder Monthly Contest – 2008.08.31, Soduku@POJ
3685	Matrix	1379	POJ Founder Monthly Contest – 2008.08.31, windy7926778
3686	The Windy's	1409	POJ Founder Monthly Contest – 2008.08.31, windy7926778
3687	Labeling Balls	2933	POJ Founder Monthly Contest – 2008.08.31, windy7926778
3703	Intuition of Escape	60	POJ Founder Monthly Contest – 2008.10.05, cyqclark
3699	miniSQL	503	POJ Founder Monthly Contest – 2008.10.05, Dagger
3700	Missile Defence System	720	POJ Founder Monthly Contest – 2008.10.05, facer
3704	Mover	40	POJ Founder Monthly Contest – 2008.10.05, Lou Tiancheng
3705	Reverse	793	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	30	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	442	POJ Founder Monthly Contest – 2008.12.28, Dagger
3714	Raid	4359	POJ Founder Monthly Contest – 2008.12.28, Dagger
3707	High-Dimensional Vector Correspondence	15	POJ Founder Monthly Contest – 2008.12.28, frkstyc
3711	Mayan Pyramid	242	POJ Founder Monthly Contest – 2008.12.28, Panda
3709	K-Anonymous Sequence	1146	POJ Founder Monthly Contest – 2008.12.28, Rainer
3708	Recurrent Function	217	POJ Founder Monthly Contest – 2008.12.28, Yaojinyu
3710	Christmas Game	570	POJ Founder Monthly Contest – 2008.12.28, Yaojinyu
1810	Covering	128	POJ Monthly
1811	Prime Test	3387	POJ Monthly
1812	Zuma Game	94	POJ Monthly
1813	Overlapped Shapes	145	POJ Monthly
1814	Polynomial	16	POJ Monthly
1815	Friendship	1360	POJ Monthly
1816	Wild Words	886	POJ Monthly
3745	Keep Contact	10	POJ Monthly Contest - 2009.08.23, Elaxia
3743	LL’s cake	91	POJ Monthly Contest - 2009.08.23, Isun
3746	Teacher YYF	208	POJ Monthly Contest - 2009.08.23, Jason
3740	Easy Finding	2285	POJ Monthly Contest - 2009.08.23, MasterLuo
3744	Scout YYF I	1748	POJ Monthly Contest - 2009.08.23, Simon
3747	Scout YYF II	243	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	214	POJ Monthly Contest - 2010.04.04, Yao Jinyu
3759	Simple Distributed computing system	63	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	1350	POJ Monthly Contest – 2009.02.22, Lei Tao
3719	Art of Balance	151	POJ Monthly Contest – 2009.02.22, Mars
3716	Panda's Birthday Present	923	POJ Monthly Contest – 2009.02.22, Simon
3715	Blue and Red	523	POJ Monthly Contest – 2009.02.22, Windy
3729	Facer’s string	322	POJ Monthly Contest – 2009.04.05, Facer
3728	The merchant	1056	POJ Monthly Contest – 2009.04.05, GaoYihan
3730	Ebbinghaus method	60	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	3938	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	432	POJ Monthly,anonymous
2444	Partition a Matrix	432	POJ Monthly,c0500301036
2446	Chessboard	3446	POJ Monthly,charlescpp
2310	Cubic Tick-Tack-Toe	43	POJ Monthly,CHEN Shixi(xreborner)
2311	Cutting Game	1539	POJ Monthly,CHEN Shixi(xreborner)
2233	GAME AGAIN!	128	POJ Monthly,dodo
2442	Sequence	2004	POJ Monthly,Guang Lin
2445	Squares	99	POJ Monthly,Guang Lin
2236	Wireless Network	7378	POJ Monthly,HQM
2237	Can 1 Marine win 2 Zerglings?	48	POJ Monthly,HQM
2235	Triangularize the Convex Hull	34	POJ Monthly,kicc
2314	POJ language	67	POJ Monthly,kicc
2153	Rank List	1993	POJ Monthly,Li Haoyuan
2239	Selecting Courses	3517	POJ Monthly,Li Haoyuan
2156	National Day Celebration	97	POJ Monthly,Loger
2152	Fire	703	POJ Monthly,Lou Tiancheng
2154	Color	1848	POJ Monthly,Lou Tiancheng
2155	Matrix	6416	POJ Monthly,Lou Tiancheng
2309	BST	5033	POJ Monthly,Minkerui
2313	Sequence	1230	POJ Monthly,Minkerui
2443	Set Operation	1048	POJ Monthly,Minkerui
2448	A New Operating System	84	POJ Monthly,Minkerui
2234	Matches Game	5198	POJ Monthly,readchild
1817	Traffic Jam	110	POJ Monthly,Southeast USA 1999
2440	DNA	1138	POJ Monthly,Static
2447	RSA	410	POJ Monthly,static
2452	Sticks Problem	1930	POJ Monthly,static
2441	Arrange the Bulls	1304	POJ Monthly,TN
2315	Football Game	162	POJ Monthly,uni
2157	Maze	989	POJ Monthly,Wang Yijie
2308	Dearboy's Puzzle	194	POJ Monthly,Wang Yijie
2453	An Easy Problem	4183	POJ Monthly,zby03
2439	Disconnect the Orange!?	70	POJ Monthly,Zeyuan Zhu
2449	Remmarguts' Date	5104	POJ Monthly,Zeyuan Zhu
2450	A New Kind of Chess	38	POJ Monthly,Zeyuan Zhu
2451	Uyuw's Concert	1419	POJ Monthly,Zeyuan Zhu
2158	A Difficult Mathematics Problem	104	POJ Monthly,李学武
2232	New Stone-Forfex-Cloth Game	497	POJ Monthly,汪艺杰
2151	Check the difficulty of problems	2324	POJ Monthly,鲁小石
2238	Computer Basketball Game	93	POJ Monthly,鲁小石
2312	Battle City	2342	POJ Monthly,鲁小石
1659	Frogs' Neighborhood	3094	POJ Monthly--2004.05.15 Alcyone@pku
1662	CoIns	190	POJ Monthly--2004.05.15 BearL@pku
1661	Help Jimmy	3153	POJ Monthly--2004.05.15 CEOI 2000
1660	Princess FroG	403	POJ Monthly--2004.05.15 duoshute@pku
1655	Balancing Act	5039	POJ Monthly--2004.05.15 IOI 2003 sample task
1654	Area	3548	POJ Monthly--2004.05.15 Liu Rujia@POJ
1656	Counting Black	6332	POJ Monthly--2004.05.15 Liu Rujia@POJ
1657	Distance on Chessboard	8062	POJ Monthly--2004.05.15 Liu Rujia@POJ
1658	Eva's Problem	10130	POJ Monthly--2004.05.15 Null
1682	Clans on the Three Gorges	309	POJ Monthly--2004.06.27 epic
1675	Happy Birthday!	883	POJ Monthly--2004.06.27 srbga@POJ
1677	Girls' Day	575	POJ Monthly--2004.06.27 srbga@POJ
1678	I Love this Game!	707	POJ Monthly--2004.06.27 srbga@POJ
1679	The Unique MST	6376	POJ Monthly--2004.06.27 srbga@POJ
1680	Fork() Makes Trouble	295	POJ Monthly--2004.06.27 srbga@POJ
1681	Painter's Problem	2147	POJ Monthly--2004.06.27 张嘉龄
1674	Sorting by Swapping	4048	POJ Monthly--2004.06.27 弱人
1676	What time is it?	625	POJ Monthly--2004.06.27 鄂继明
1698	Alice's Chance	1887	POJ Monthly--2004.07.18
1699	Best Sequence	3073	POJ Monthly--2004.07.18
1700	Crossing River	6125	POJ Monthly--2004.07.18
1701	Dissatisfying Lift	1007	POJ Monthly--2004.07.18
1702	Eva's Balance	1723	POJ Monthly--2004.07.18
1703	Find them, Catch them	8897	POJ Monthly--2004.07.18
1704	Georgia and Bob	3147	POJ Monthly--2004.07.18
1705	Generational Replacement	75	POJ Monthly--2004.07.18
2519	Cutting Necklace	79	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	3184	POJ Monthly--2005.07.31, Wang Yijie
2521	How much did the businessman lose	6900	POJ Monthly--2005.07.31, Wang Yijie
2515	Birthday Cake	251	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	256	POJ Monthly--2005.08.28,kicc
2593	Max Sequence	6064	POJ Monthly--2005.08.28,Li Haoyuan
2594	Treasure Exploration	2605	POJ Monthly--2005.08.28,Li Haoyuan
2591	Set Definition	3434	POJ Monthly--2005.08.28,Static
2595	Min-Max	281	POJ Monthly--2005.08.28,Static
2597	Line Segment Erase	344	POJ Monthly--2005.08.28,Static
2748	Logs Stacking	802	POJ Monthly--2006.01.22,anonymous
2751	Saving Endeavour	688	POJ Monthly--2006.01.22,anonymous
2755	Dominoes	38	POJ Monthly--2006.01.22,Loger
2750	Potted Flower	1376	POJ Monthly--2006.01.22,Zeyuan Zhu
2752	Seek the Name, Seek the Fame	6993	POJ Monthly--2006.01.22,Zeyuan Zhu
2753	Similarity of necklaces	35	POJ Monthly--2006.01.22,Zeyuan Zhu
2754	Similarity of necklaces 2	175	POJ Monthly--2006.01.22,Zeyuan Zhu
2749	Building roads	1424	POJ Monthly--2006.01.22,zhucheng
2756	Autumn is a Genius	1496	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	178	POJ Monthly--2006.02.26,zgl & twb
2761	Feed the dogs	3014	POJ Monthly--2006.02.26,zgl & twb
2762	Going from u to v or from v to u?	2871	POJ Monthly--2006.02.26,zgl & twb
2763	Housewife Wind	1746	POJ Monthly--2006.02.26,zgl & twb
2777	Count Color	7911	POJ Monthly--2006.03.26,dodo
2778	DNA Sequence	2945	POJ Monthly--2006.03.26,dodo
2775	The Number of the Same BST	417	POJ Monthly--2006.03.26,newton88518
2773	Happy 2006	2559	POJ Monthly--2006.03.26,static
2780	Linearity	1197	POJ Monthly--2006.03.26,static
2774	Long Long Message	5335	POJ Monthly--2006.03.26,Zeyuan Zhu,"Dedicate to my great beloved mother."
2779	Atom Bombs!? God!	43	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?!	1269	POJ Monthly--2006.04.28, Dagger@PKU_RPWT
2819	TN's Kingdom I - Establishment	178	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	72	POJ Monthly--2006.04.28, frkstyc@PKU_RPWT
2822	TN's Kingdom IV - Collapse	77	POJ Monthly--2006.04.28, frkstyc@PKU_RPWT
2823	Sliding Window	9517	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	344	POJ Monthly--2006.05.28, Static
2830	Max Sequence II	84	POJ Monthly--2006.05.28, Static
2833	The Average	2589	POJ Monthly--2006.05.28, zby03
2828	Buy Tickets	5922	POJ Monthly--2006.05.28, Zhu, Zeyuan
2831	Can We Build This One?	444	POJ Monthly--2006.05.28, zhucheng
2832	How Many Pairs?	446	POJ Monthly--2006.05.28, zhucheng
2843	Cutting Cake	132	POJ Monthly--2006.06.25, Chen Xue
2837	Silver Matrix	571	POJ Monthly--2006.06.25, Lei Tao
2840	Big Clock	5927	POJ Monthly--2006.06.25, Lei Tao
2839	Convex Hull and Triangle	27	POJ Monthly--2006.06.25, Long Fan
2842	N-dimension Matching	82	POJ Monthly--2006.06.25, Long Fan
2841	Navigation Game	66	POJ Monthly--2006.06.25, Yang Yi
2844	Sum and Product	73	POJ Monthly--2006.06.25, Yang Yi
2838	Graph Connectivity	501	POJ Monthly--2006.06.25, Zheng Zhao
2888	Magic Bracelet	1035	POJ Monthly--2006.07.30, cuiaoxiang
2893	M × N Puzzle	854	POJ Monthly--2006.07.30, newton88518
2886	Who Gets the Most Candies?	2527	POJ Monthly--2006.07.30, Sempr
2890	Matrix Multiplication	368	POJ Monthly--2006.07.30, Static
2891	Strange Way to Express Integers	3535	POJ Monthly--2006.07.30, Static
2892	Tunnel Warfare	2309	POJ Monthly--2006.07.30, updog
2889	Unique Solution	166	POJ Monthly--2006.07.30, Wang, Yijie
2887	Big String	1179	POJ Monthly--2006.07.30, zhucheng
2982	Time Travel	368	POJ Monthly--2006.08.27, Dagger
2983	Is the Information Reliable?	2348	POJ Monthly--2006.08.27, Dagger
2981	Deal of Fortune	18	POJ Monthly--2006.08.27, frkstyc
2987	Firing	1704	POJ Monthly--2006.08.27, frkstyc
2988	Function Approximation	37	POJ Monthly--2006.08.27, frkstyc
2986	A Triangle and a Circle	436	POJ Monthly--2006.08.27, Rainer
2984	A New Joseph Problem	474	POJ Monthly--2006.08.27, zcgzcgzcg
2985	The k-th Largest Group	1734	POJ Monthly--2006.08.27, zcgzcgzcg
3015	Expected Difference	257	POJ Monthly--2006.09.29, ACRush
3016	K-Monotonic	257	POJ Monthly--2006.09.29, ACRush, modified from TopCoder SRM 309 KMonotonic
3012	A Number from Yanghui Triangle	620	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	1182	POJ Monthly--2006.09.29, Kim, Chan Min (kcm1700@POJ)
3018	Giftbox	740	POJ Monthly--2006.09.29, sza
3019	Image Rotation	17	POJ Monthly--2006.09.29, zby03
3017	Cut the Sequence	1934	POJ Monthly--2006.09.29, zhucheng
3162	Walking Race	581	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	2327	POJ Monthly--2006.12.31, galaxy
3159	Candies	4461	POJ Monthly--2006.12.31, Sempr
3160	Father Christmas flymouse	714	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	3	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	1334	POJ Monthly--2007.03.04, Ikki
3205	Ikki's Story II - War with TN	172	POJ Monthly--2007.03.04, Ikki
3206	Ikki's Story III - Rescue frkstyc!	94	POJ Monthly--2007.03.04, Ikki
3207	Ikki's Story IV - Panda's Trick	2612	POJ Monthly--2007.03.04, Ikki
3209	From Pythagoras to …	203	POJ Monthly--2007.03.04, Ikki
3208	Apocalypse Someday	941	POJ Monthly--2007.03.04, Ikki, adapted from TCHS SRM 2 ApocalypseSomeday
3216	Repairing Company	1337	POJ Monthly--2007.04.01, crazyb0y
3214	Heap	438	POJ Monthly--2007.04.01, czh
3211	Washing Clothes	2205	POJ Monthly--2007.04.01, dearboy
3215	Median of Lines	132	POJ Monthly--2007.04.01, dearboy
3217	Eugenics	259	POJ Monthly--2007.04.01, Huang, Jinsong
3212	Rescue Alice	271	POJ Monthly--2007.04.01, Liu, Cheng
3210	Coins	4403	POJ Monthly--2007.04.01, Snoopy
3213	PM3	980	POJ Monthly--2007.04.01, zhucheng
3233	Matrix Power Series	6933	POJ Monthly--2007.06.03, Huang, Jinsong
3240	Solution to the n2 − 1 Puzzle	43	POJ Monthly--2007.06.03, Huang, Jinsong
3234	The Kylin Den	14	POJ Monthly--2007.06.03, Jia, You
3236	Michelle's Evaluation	62	POJ Monthly--2007.06.03, Jia, You
3235	Super Knight	39	POJ Monthly--2007.06.03, Lei, Tao
3237	Tree	1302	POJ Monthly--2007.06.03, Lei, Tao
3238	A Coin Game	70	POJ Monthly--2007.06.03, Yao, Jinyu
3239	Solution to the n Queens Puzzle	1267	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	62	POJ Monthly--2007.07.08, Chen, Qifeng
3243	Clever Y	1025	POJ Monthly--2007.07.08, Guo, Huayang
3247	Robots	7	POJ Monthly--2007.07.08, Guo, Huayang
3246	Game	244	POJ Monthly--2007.07.08, Wang, Dong
3244	Difference between Triplets	622	POJ Monthly--2007.07.08, Yuan, Xinhao
3249	Test for Job	1620	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	80	POJ Monthly--2007.08.05, Hooyeon Lee (ltdtl@POJ), "I like dragons"
3321	Apple Tree	6262	POJ Monthly--2007.08.05, Huang, Jinsong
3320	Jessica's Reading Problem	4176	POJ Monthly--2007.08.05, Jerry
3241	Object Clustering	433	POJ Monthly--2007.08.05, Li, Haoyuan
3318	Matrix Multiplication	3101	POJ Monthly--2007.08.05, qzc
3322	Bloxorz I	1476	POJ Monthly--2007.08.05, Rainer
3323	Bloxorz II	137	POJ Monthly--2007.08.05, Rainer
3372	Candy Distribution	2768	POJ Monthly--2007.09.09, ailyanlu@zsu
3377	Ferry Lanes	634	POJ Monthly--2007.09.09, Dagger
3371	Flesch Reading Ease	496	POJ Monthly--2007.09.09, frkstyc
3373	Changing Digits	790	POJ Monthly--2007.09.09, Rainer
3378	Crazy Thairs	1107	POJ Monthly--2007.09.09, tdzl2003
3374	Cake Share	600	POJ Monthly--2007.09.09, Updog
3375	Network Connection	463	POJ Monthly--2007.09.09, Updog
3376	Finding Palindromes	389	POJ Monthly--2007.09.09, Zhou Gelin, modified from POI06
3421	X-factor Chains	1994	POJ Monthly--2007.10.06, ailyanlu@zsu
3418	Quadratic Functions	100	POJ Monthly--2007.10.06, Amber(hupo001)@POJ
3420	Quad Tiling	1582	POJ Monthly--2007.10.06, Dagger
3422	Kaka's Matrix Travels	2217	POJ Monthly--2007.10.06, Huang, Jinsong
3419	Difference Is Beautiful	460	POJ Monthly--2007.10.06, SHOIT@ZSU
3416	Crossing	538	POJ Monthly--2007.10.06, Wang Dong
3415	Common Substrings	2162	POJ Monthly--2007.10.06, wintokk
3417	Network	1442	POJ Monthly--2007.10.06, Yang Mu
3464	Approximations	19	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	289	POJ Monthly--2007.11.25, Yang Yi
3468	A Simple Problem with Integers	15696	POJ Monthly--2007.11.25, Yang Yi
3469	Dual Core CPU	3698	POJ Monthly--2007.11.25, Zhou Dong
3470	Walls	208	POJ Monthly--2007.11.25, Zhou Dong
3471	Integral Roots	172	POJ Monthly--2007.11.25, Zhou Dong
1831	不定方程组	188	qinlu@POJ
1832	连环锁	378	qinlu@POJ
1833	排列	5614	qinlu@POJ
1834	线段处理	56	qinlu@POJ
1835	宇航员	1797	qinlu@POJ
2316	SPIN	2936	Rocky Mountain 2003
2317	SHAKE	278	Rocky Mountain 2003
2318	TOYS	4874	Rocky Mountain 2003
2319	COMPRESS	95	Rocky Mountain 2003
2320	SHEET	113	Rocky Mountain 2003
2321	GYM	234	Rocky Mountain 2003
2322	PLANKS	93	Rocky Mountain 2003
2323	PERMS	520	Rocky Mountain 2003
2000	Gold Coins	12714	Rocky Mountain 2004
2001	Shortest Prefixes	5677	Rocky Mountain 2004
2002	Squares	4280	Rocky Mountain 2004
2003	Hire and Fire	550	Rocky Mountain 2004
2004	Mix and Build	656	Rocky Mountain 2004
2005	Blackjack	529	Rocky Mountain 2004
2006	Litmus Test	928	Rocky Mountain 2004
2007	Scrambled Polygon	3182	Rocky Mountain 2004
2713	Tire Dimensions	287	Rocky Mountain 2005
2714	Random Walk	287	Rocky Mountain 2005
2715	Paint Mix	334	Rocky Mountain 2005
2716	Open and Close	56	Rocky Mountain 2005
2717	Hour Glass	44	Rocky Mountain 2005
2718	Smallest Difference	2656	Rocky Mountain 2005
2719	Faulty Odometer	4643	Rocky Mountain 2005
2720	Last Digits	279	Rocky Mountain 2005
2721	Suit Distribution	385	Rocky Mountain 2005
3437	Tree Grafting	808	Rocky Mountain 2007
3438	Look and Say	4697	Rocky Mountain 2007
3439	Server Relocation	545	Rocky Mountain 2007
3440	Coin Toss	771	Rocky Mountain 2007
3441	Vacation Rentals	184	Rocky Mountain 2007
3442	Baseball	85	Rocky Mountain 2007
3443	Team Work	170	Rocky Mountain 2007
3444	Wavelet Compression	1271	Rocky Mountain 2007
3445	Elementary Additions	1182	Rocky Mountain 2007
1818	ATP	279	Romania OI 2002
1819	Disks	335	Romania OI 2002
1820	Expression	13	Romania OI 2002
1821	Fence	1495	Romania OI 2002
1822	Fence2	110	Romania OI 2002
1823	Hotel	819	Romania OI 2002
1824	TwoFour	32	Romania OI 2002
1825	Young	130	Romania OI 2002
1836	Alignment	4114	Romania OI 2002
1837	Balance	6520	Romania OI 2002
1838	Banana	554	Romania OI 2002
1840	Eqs	4350	Romania OI 2002
1843	Shire	21	Romania OI 2002
1844	Sum	5978	Romania OI 2002
1845	Sumdiv	4228	Romania OI 2002
1846	System	78	Romania OI 2002
1848	Tree	979	Romania OI 2002
1850	Code	3845	Romania OI 2002
3970	Party	2076	Seventh ACM Egyptian National Programming Contest
3971	Scales	135	Seventh ACM Egyptian National Programming Contest
3972	BF	51	Seventh ACM Egyptian National Programming Contest
3973	Highlights	53	Seventh ACM Egyptian National Programming Contest
3974	Palindrome	2871	Seventh ACM Egyptian National Programming Contest
3975	Shortcut	63	Seventh ACM Egyptian National Programming Contest
3976	Kings	35	Seventh ACM Egyptian National Programming Contest
3977	Subset	820	Seventh ACM Egyptian National Programming Contest
3978	Primes	1362	Seventh ACM Egyptian National Programming Contest
2280	Amphiphilic Carbon Molecules	340	Shanghai 2004
2281	Link and Pop -- the Block Game	126	Shanghai 2004
2282	The Counting Problem	1917	Shanghai 2004
2283	Different Digits	444	Shanghai 2004
2284	That Nice Euler Circuit	446	Shanghai 2004
2285	The Floor Bricks	123	Shanghai 2004
2286	The Rotation Game	1403	Shanghai 2004
2287	Tian Ji -- The Horse Racing	3493	Shanghai 2004
2288	Islands and Bridges	1908	Shanghai 2004
2289	Jamie's Contact Groups	1412	Shanghai 2004
2078	Matrix	1452	Shanghai 2004 Preliminary
2079	Triangle	1469	Shanghai 2004 Preliminary
2080	Calendar	3928	Shanghai 2004 Preliminary
2081	Recaman's Sequence	7092	Shanghai 2004 Preliminary
2082	Terrible Sets	1760	Shanghai 2004 Preliminary
2083	Fractal	6866	Shanghai 2004 Preliminary
2084	Game of Connections	3184	Shanghai 2004 Preliminary
2085	Inversion	1461	Shanghai 2004 Preliminary
3138	ACM Team Selection	817	Shanghai 2006
3139	Balancing the Scale	385	Shanghai 2006
3140	Contestants Division	1889	Shanghai 2006
3141	Distant Galaxy	432	Shanghai 2006
3142	Escape Plan	47	Shanghai 2006
3143	False Perceptions	14	Shanghai 2006
3144	Guarding Zion	17	Shanghai 2006
3145	Harmony Forever	501	Shanghai 2006
3146	Interesting Yang Hui Triangle	712	Shanghai 2006
3147	John's Canonical Difference Bound Matrices	58	Shanghai 2006
3112	Digital Biochemist Circuit	340	South America 2006, Brazil Subregion
3113	The Halting Problem	27	South America 2006, Brazil Subregion
3114	Countries in War	786	South America 2006, Brazil Subregion
3115	Energy × Delay	116	South America 2006, Brazil Subregion
3116	MegaCheckers	35	South America 2006, Brazil Subregion
3117	World Cup	4087	South America 2006, Brazil Subregion
3118	Critical Route	66	South America 2006, Brazil Subregion
3119	Friends or Enemies?	165	South America 2006, Brazil Subregion
3226	String's Puzzle	815	South Central China 2007 hosted by NUDT
3227	Mountains	368	South Central China 2007 hosted by NUDT
3228	Gold Transportation	804	South Central China 2007 hosted by NUDT
3229	The Best Travel Design	251	South Central China 2007 hosted by NUDT
3230	Travel	1463	South Central China 2007 hosted by NUDT
3231	FlashGet	337	South Central China 2007 hosted by NUDT
3232	Accelerator	660	South Central China 2007 hosted by NUDT
3585	Accumulation Degree	1162	South Central China 2008 hosted by NUDT
3586	The missionaries and cannibals	59	South Central China 2008 hosted by NUDT
3587	The Biggest Cake	309	South Central China 2008 hosted by NUDT
3588	The Downloading Task	221	South Central China 2008 hosted by NUDT
3589	Number-guessing Game	4449	South Central China 2008 hosted by NUDT
3590	The shuffle Problem	502	South Central China 2008 hosted by NUDT
3591	Ants and Aphides	13	South Central China 2008 hosted by NUDT
3592	Instantaneous Transference	834	South Central China 2008 hosted by NUDT
3593	Sea Base Exploration	182	South Central China 2008 hosted by NUDT
1589	Unix ls	745	South Central USA 1995
1590	Palindromes	1280	South Central USA 1995
1591	M*A*S*H	606	South Central USA 1995
1592	Postscript	69	South Central USA 1995
1593	Radar Scopes	41	South Central USA 1995
1594	Message Routing	49	South Central USA 1995
1595	Prime Cuts	3657	South Central USA 1996
1596	Gears on a Board	34	South Central USA 1996
1597	Uniform Generator	2327	South Central USA 1996
1598	Excuses, Excuses!	1281	South Central USA 1996
1599	Station Balance	181	South Central USA 1996
1600	Centipede Collisions	80	South Central USA 1996
1601	Pizza Anyone?	226	South Central USA 1997
1603	Risk	1244	South Central USA 1997
1604	Just the Facts	4082	South Central USA 1997
1605	Horse Shoe Scoring	25	South Central USA 1997
1606	Jugs	2203	South Central USA 1997
1910	Adam's Genes	24	South Central USA 1997
1076	Bowl	198	South Central USA 1998
1077	Eight	5993	South Central USA 1998
1078	Gizilch	572	South Central USA 1998
1079	Ratio	1240	South Central USA 1998
1081	You Who?	306	South Central USA 1998
1607	Deck	3259	South Central USA 1998
2218	Does This Make Me Look Fat?	993	South Central USA 2001
2219	Manifest Destiny	48	South Central USA 2001
2220	Treasure Hunters	162	South Central USA 2001
2221	Frogger's For Dinner	87	South Central USA 2001
2222	Deeper Blue	153	South Central USA 2001
2223	Get Out 'Da Way!	41	South Central USA 2001
2224	Missing Piece 2001	53	South Central USA 2001
2225	Asteroids!	1023	South Central USA 2001
1298	The Hardest Problem Ever	11896	South Central USA 2002
1299	Polar Explorer	1332	South Central USA 2002
1300	Door Man	1150	South Central USA 2002
1301	The Umbrella Problem: 2054	137	South Central USA 2002
1302	Blue Gene, Jr.	386	South Central USA 2002
1303	Byte Me!	119	South Central USA 2002
1304	World's Worst Bus Schedule	279	South Central USA 2002
2578	Keep on Truckin'	5819	South Central USA 2003
2579	Blurred Vision	1423	South Central USA 2003
2580	The Door/Key Problem	156	South Central USA 2003
2581	Exact Change Only	731	South Central USA 2003
2582	Finding Nemo	215	South Central USA 2003
2583	Series Determination	3961	South Central USA 2003
2584	T-Shirt Gumbo	1217	South Central USA 2003
2585	Window Pains	992	South Central USA 2003
2020	MisLED	162	South Central USA 2004
2021	Relative Relatives	1446	South Central USA 2004
2022	Syntax Included	187	South Central USA 2004
2023	Choose Your Own Adventure	640	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	150	South Central USA 2004
2027	No Brainer	15181	South Central USA 2004
2802	Plinko	222	South Central USA 2005
2803	Defining Moment	675	South Central USA 2005
2804	Jetpack Sniper 3000 Fragfest Extreme	89	South Central USA 2005
2805	Pegs	205	South Central USA 2005
2806	Janken Tactics	36	South Central USA 2005
2807	Bingo!	76	South Central USA 2005
2808	Artificial Strife	132	South Central USA 2005
2809	It's My Derivative	301	South Central USA 2005
3077	Rounders	4427	South Central USA 2006
3078	Q	1115	South Central USA 2006
3079	Enigmatologically Cruciverbalistic	97	South Central USA 2006
3080	Blue Jeans	5411	South Central USA 2006
3081	Core Wars	53	South Central USA 2006
3082	'Roid Rage	236	South Central USA 2006
3083	Children of the Candy Corn	4336	South Central USA 2006
3084	Panic Room	808	South Central USA 2006
1463	Strategic game	2844	Southeastern Europe 2000
1464	Company	33	Southeastern Europe 2000
1465	Multiple	1170	Southeastern Europe 2000
1466	Girls and Boys	3758	Southeastern Europe 2000
1467	Symbolic Derivation	57	Southeastern Europe 2000
1468	Rectangles	1129	Southeastern Europe 2000
1469	COURSES	6587	Southeastern Europe 2000
1470	Closest Common Ancestors	3310	Southeastern Europe 2000
1276	Cash Machine	8795	Southeastern Europe 2002
1277	Beer Land	269	Southeastern Europe 2002
1278	BOAT	123	Southeastern Europe 2002
1279	Art Gallery	1746	Southeastern Europe 2002
1280	Game	150	Southeastern Europe 2002
1281	MANAGER	939	Southeastern Europe 2002
1287	Networking	4104	Southeastern Europe 2002
1288	Sly Number	118	Southeastern Europe 2002
1453	Delta Encoding and Decoding	193	Southeastern Europe 2003
1455	Crazy tea party	4585	Southeastern Europe 2003
1456	Supermarket	4579	Southeastern Europe 2003
1457	Lord of the Ring	141	Southeastern Europe 2003
1458	Common Subsequence	17436	Southeastern Europe 2003
1459	Power Network	6041	Southeastern Europe 2003
1460	Firefighters	237	Southeastern Europe 2003
1461	Binary Polynomials	112	Southeastern Europe 2003
1961	Period	6539	Southeastern Europe 2004
1962	Corporative Network	1019	Southeastern Europe 2004
1963	Cave Exploration	66	Southeastern Europe 2004
1964	City Game	1576	Southeastern Europe 2004
1965	Cube Root	267	Southeastern Europe 2004
1966	Cable TV Network	1623	Southeastern Europe 2004
1967	Alibaba	81	Southeastern Europe 2004
1968	Booklets	246	Southeastern Europe 2004
1969	Count on Canton	4996	Southeastern Europe 2004
2674	Linear world	758	Southeastern Europe 2005
2675	Songs	644	Southeastern Europe 2005
2676	Sudoku	7447	Southeastern Europe 2005
2677	Tour	1468	Southeastern Europe 2005
2678	Mothy	107	Southeastern Europe 2005
2679	Adventurous Driving	330	Southeastern Europe 2005
2680	Computer Transformation	1356	Southeastern Europe 2005
2681	Anagrammatic Distance	1996	Southeastern Europe 2005
2682	Tomato Automata	41	Southeastern Europe 2005
3061	Subsequence	8894	Southeastern Europe 2006
3062	Celebrity jeopardy	7474	Southeastern Europe 2006
3063	Sherlock Holmes	165	Southeastern Europe 2006
3064	Payment System	49	Southeastern Europe 2006
3065	Stargates	247	Southeastern Europe 2006
3066	Maximum	392	Southeastern Europe 2006
3067	Japan	4760	Southeastern Europe 2006
3068	"Shortest" pair of paths	725	Southeastern Europe 2006
3076	Sudoku	1203	Southeastern Europe 2006
3480	John	1343	Southeastern Europe 2007
3481	Double Queue	3614	Southeastern Europe 2007
3482	‘JBC’	191	Southeastern Europe 2007
3483	Loan Scheduling	382	Southeastern Europe 2007
3484	Showstopper	565	Southeastern Europe 2007
3485	Highway	410	Southeastern Europe 2007
3486	Computers	719	Southeastern Europe 2007
3487	The Stable Marriage Problem	3050	Southeastern Europe 2007
3488	Arne Saknussemm	639	Southeastern Europe 2007
3903	Stock Exchange	2084	Southeastern European Regional Programming Contest 2008
3904	Sky Code	869	Southeastern European Regional Programming Contest 2008
3905	Perfect Election	387	Southeastern European Regional Programming Contest 2008
3906	Lucky cities	63	Southeastern European Regional Programming Contest 2008
3907	Build Your Home	494	Southeastern European Regional Programming Contest 2008
3908	Quick answer	205	Southeastern European Regional Programming Contest 2008
3909	Lucky numbers	186	Southeastern European Regional Programming Contest 2008
3910	GCD Determinant	231	Southeastern European Regional Programming Contest 2008
3911	Internet Service Providers	274	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	158	Southeastern European Regional Programming Contest 2009
3895	Cycles of Lanes	427	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	85	Southeastern European Regional Programming Contest 2009
3899	The Lucky Numbers	80	Southeastern European Regional Programming Contest 2009
3900	The Robbery	199	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	14981	Southern African 2001
1128	Frame Stacking	1512	Southern African 2001
1129	Channel Allocation	6467	Southern African 2001
1130	Alien Security	854	Southern African 2001
1131	Octal Fractions	3293	Southern African 2001
1329	Circle Through Three Points	1291	Southern California 1989,UVA 190
1198	Solitaire	827	Southwestern Europe 2002
1199	Left labyrinths	109	Southwestern Europe 2002
1200	Crazy Search	4701	Southwestern Europe 2002
1201	Intervals	7229	Southwestern Europe 2002
1202	Family	110	Southwestern Europe 2002
1203	Timetable	97	Southwestern Europe 2002
1204	Word Puzzles	2397	Southwestern Europe 2002
1205	Water Treatment Plants	492	Southwestern Europe 2002
1206	Servers	106	Southwestern Europe 2002
2781	The mysterious X network	624	Southwestern Europe 2005
2782	Bin Packing	1867	Southwestern Europe 2005
2783	On Storing Clothes	116	Southwestern Europe 2005
2784	Buy or Build	451	Southwestern Europe 2005
2785	4 Values whose Sum is 0	6013	Southwestern Europe 2005
2786	Keep the Customer Satisfied	337	Southwestern Europe 2005
2787	UFO Cubes in Roswell	19	Southwestern Europe 2005
2788	Black Box	91	Southwestern Europe 2005
2789	Pixel Shuffle	129	Southwestern Europe 2005
2790	Consecutive ones	294	Southwestern Europe 2005
1256	Anagram	7298	Southwestern European Regional Contest 1995
1272	Synchronous Design	63	Southwestern European Regional Contest 1995
1347	Triangle	57	Southwestern European Regional Contest 1995
1410	Intersection	2729	Southwestern European Regional Contest 1995
1419	Graph Coloring	1697	Southwestern European Regional Contest 1995
1420	Spreadsheet	294	Southwestern European Regional Contest 1995
1421	Peter's Calculator	69	Southwestern European Regional Contest 1995
1015	Jury Compromise	5791	Southwestern European Regional Contest 1996
1132	Border	1647	Southwestern European Regional Contest 1996
1133	Stars	143	Southwestern European Regional Contest 1996
1134	Hexagon	199	Southwestern European Regional Contest 1996
1135	Domino Effect	1793	Southwestern European Regional Contest 1996
1136	Pendulum	75	Southwestern European Regional Contest 1996
1137	The New Villa	370	Southwestern European Regional Contest 1996
1138	Ships	88	Southwestern European Regional Contest 1996
1471	Triangles	637	Southwestern European Regional Contest 1997
1472	Instant Complexity	685	Southwestern European Regional Contest 1997
1473	There's Treasure Everywhere!	768	Southwestern European Regional Contest 1997
1474	Video Surveillance	1305	Southwestern European Regional Contest 1997
1475	Pushing Boxes	1756	Southwestern European Regional Contest 1997
1476	Always On the Run	350	Southwestern European Regional Contest 1997
1477	Box of Bricks	7715	Southwestern European Regional Contest 1997
1478	Island of Logic	189	Southwestern European Regional Contest 1997
1479	MBone	38	Southwestern European Regional Contest 1997
1263	Reflections	412	Southwestern European Regional Contest 1998
1480	Optimal Programs	306	Southwestern European Regional Contest 1998
1481	The Die Is Cast	399	Southwestern European Regional Contest 1998
1482	It's not a Bug, It's a Feature!	370	Southwestern European Regional Contest 1998
1483	Going in Circles on Alpha Centauri	38	Southwestern European Regional Contest 1998
1484	Blowing Fuses	1417	Southwestern European Regional Contest 1998
1485	Fast Food	1252	Southwestern European Regional Contest 1998
1486	Sorting Slides	1387	Southwestern European Regional Contest 1998
1487	Single-Player Games	257	Southwestern European Regional Contest 1998
2951	Cake Cutting	567	Stanford Local 2004
2952	Election	411	Stanford Local 2004
2953	Nash Equilibrium	262	Stanford Local 2004
2954	Triangle	2021	Stanford Local 2004
2955	Brackets	3622	Stanford Local 2004
2956	Repeatless Numbers	663	Stanford Local 2004
2957	Planet Hunting	199	Stanford Local 2004
2973	Scrabble	971	Stanford Local 2005
2974	Convex area	178	Stanford Local 2005
2975	Nim	2316	Stanford Local 2005
2976	Dropping tests	4143	Stanford Local 2005
2977	Box walking	501	Stanford Local 2005
2978	Colored stones	636	Stanford Local 2005
2979	RSI	140	Stanford Local 2005
2980	Do it!	325	Stanford Local 2005
3069	Saruman's Army	6650	Stanford Local 2006
3070	Fibonacci	9810	Stanford Local 2006
3071	Football	2266	Stanford Local 2006
3072	Robot	424	Stanford Local 2006
3073	Spam	518	Stanford Local 2006
3074	Sudoku	1898	Stanford Local 2006
3075	Tic-Tac-Toe	741	Stanford Local 2006
3020	Antenna Placement	3709	Svenskt Mästerskap i Programmering/Norgesmesterskapet 2001
3021	e-Coins	299	Svenskt Mästerskap i Programmering/Norgesmesterskapet 2001
3022	The Uxuhul Voting System	148	Svenskt Mästerskap i Programmering/Norgesmesterskapet 2001
3023	Submarines	143	Svenskt Mästerskap i Programmering/Norgesmesterskapet 2001
3024	The Gossiping System	110	Svenskt Mästerskap i Programmering/Norgesmesterskapet 2001
3025	Rings	350	Svenskt Mästerskap i Programmering/Norgesmesterskapet 2001
3026	Borg Maze	3209	Svenskt Mästerskap i Programmering/Norgesmesterskapet 2001
3027	Base equality	494	Svenskt Mästerskap i Programmering/Norgesmesterskapet 2001
2904	The Mailboxes Manufacturers Problem	662	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	1183	Svenskt Mästerskap i Programmering/Norgesmesterskapet 2002
2908	Quantum	541	Svenskt Mästerskap i Programmering/Norgesmesterskapet 2002
2909	Goldbach's Conjecture	5414	Svenskt Mästerskap i Programmering/Norgesmesterskapet 2002
2910	Downpayment	29	Svenskt Mästerskap i Programmering/Norgesmesterskapet 2002
2911	Simplified λ-evaluations	43	Svenskt Mästerskap i Programmering/Norgesmesterskapet 2002
2998	Hardware	337	Svenskt Mästerskap i Programmering/Norgesmesterskapet 2003
3000	Frogger	193	Svenskt Mästerskap i Programmering/Norgesmesterskapet 2003
3001	Gallup	212	Svenskt Mästerskap i Programmering/Norgesmesterskapet 2003
3002	Jackpot	1287	Svenskt Mästerskap i Programmering/Norgesmesterskapet 2003
3003	Spiderman’s workout	576	Svenskt Mästerskap i Programmering/Norgesmesterskapet 2003
3004	Subway planning	260	Svenskt Mästerskap i Programmering/Norgesmesterskapet 2003
3005	Exploding CPU	155	Svenskt Mästerskap i Programmering/Norgesmesterskapet 2003
2958	Pizza delivery	498	Svenskt Mästerskap i Programmering/Norgesmesterskapet 2004
2959	Ball bearings	1580	Svenskt Mästerskap i Programmering/Norgesmesterskapet 2004
2960	S-Nim	1674	Svenskt Mästerskap i Programmering/Norgesmesterskapet 2004
2961	Sylvester construction	495	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	424	Svenskt Mästerskap i Programmering/Norgesmesterskapet 2004
2999	Matrix	18	Svenskt Mästerskap i Programmering/Norgesmesterskapet 99
1060	Modular multiplication of polynomials	1837	Taejon 2001
1063	Flip and Shift	3060	Taejon 2001
1065	Wooden Sticks	8287	Taejon 2001
1080	Human Gene Functions	9392	Taejon 2001
1082	Calendar Game	2595	Taejon 2001
1083	Moving Tables	9356	Taejon 2001
1084	Square Destroyer	1770	Taejon 2001
1092	Farmland	347	Taejon 2001
1330	Nearest Common Ancestors	9522	Taejon 2002
1331	Multiply	2784	Taejon 2002
1332	Finding Liars	353	Taejon 2002
1333	Christmas Gifts	49	Taejon 2002
1334	Two Mountaineers	143	Taejon 2002
1335	Digital Onion	103	Taejon 2002
1336	The K-League	191	Taejon 2002
1337	A Lazy Worker	314	Taejon 2002
1377	Good Approximation Problem	166	Taiwan 2001
1378	Power Cable Problem	150	Taiwan 2001
1387	The Constraint Densest Submatrix	214	Taiwan 2001
1388	Hinge Node Problem	236	Taiwan 2001
1389	Area of Simple Polygons	1326	Taiwan 2001
1339	poker card game	258	Taiwan 2002
1340	The Longest Detour Problem	156	Taiwan 2002
1341	The Strongest Subchains	124	Taiwan 2002
1342	Tag Trees	73	Taiwan 2002
1343	Rooted Trees Isomorphism	116	Taiwan 2002
1344	Tree Size Problem	198	Taiwan 2002
2694	A Simple Poker Game	603	Taiwan 2004
2695	Rick the Persistent Gnu	246	Taiwan 2004
2696	A Mysterious Function	2467	Taiwan 2004
2697	A Board Game	264	Taiwan 2004
2698	Servicing DVD Requests	390	Taiwan 2004
2699	The Maximum Number of Strong Kings	718	Taiwan 2004
2700	Space Travel	72	Taiwan 2004
2701	Lapux the Floating Island	113	Taiwan 2004
2702	Can a Complicated Program Go Wrong?	124	Taiwan 2004
2703	Maximum Area Covered by Rectangles	317	Taiwan 2004
1690	(Your)((Term)((Project)))	1105	Tehran 1999
1691	Painting A Board	1466	Tehran 1999
1692	Crossed Matchings	1589	Tehran 1999
1693	Counting Rectangles	538	Tehran 1999
1694	An Old Stone Game	1356	Tehran 1999
1695	Magazine Delivery	969	Tehran 1999
1696	Space Ant	2216	Tehran 1999
1697	The Erythea Campaign	213	Tehran 1999
1275	Cashier Employment	2179	Tehran 2000
1663	Number Steps	6968	Tehran 2000
1683	Puzzlestan	356	Tehran 2000
1684	Dynamic Declaration Language (DDL)	276	Tehran 2000
1685	Color Tunnels	239	Tehran 2000
1686	Lazy Math Instructor	1068	Tehran 2000
1687	Buggy Sat	539	Tehran 2000
1688	Dolphin Pool	157	Tehran 2000
1689	3002 Rubbery	87	Tehran 2000
1068	Parencodings	13176	Tehran 2001
1069	The Bermuda Triangle	490	Tehran 2001
1070	Deformed Wheel	160	Tehran 2001
1071	Illusive Chase	574	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	242	Tehran 2001
1356	Grandpa's Other Estate	248	Tehran 2002
1357	Afshung Pizza Delivery	53	Tehran 2002
1358	Housing Complexes	120	Tehran 2002
1359	Spacecraft Malfunction	169	Tehran 2002
1360	Blue x Red = Bang	24	Tehran 2002
1361	JaWs	30	Tehran 2002
1362	Skew Binary	374	Tehran 2002
1226	Substrings	3582	Tehran 2002 Preliminary
1227	RoboContest	180	Tehran 2002 Preliminary
1228	Grandpa's Estate	2571	Tehran 2002 Preliminary
1229	Wild Domains	274	Tehran 2002 Preliminary
1230	Pass-Muraille	2302	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	8121	Tehran 2002, First Iran Nationwide Internet Programming Contest
1019	Number Sequence	9485	Tehran 2002, First Iran Nationwide Internet Programming Contest
1020	Anniversary Cake	3830	Tehran 2002, First Iran Nationwide Internet Programming Contest
1021	2D-Nim	1759	Tehran 2002, First Iran Nationwide Internet Programming Contest
1022	Packing Unit 4D Cubes	831	Tehran 2002, First Iran Nationwide Internet Programming Contest
1023	The Fun Number System	3181	Tehran 2002, First Iran Nationwide Internet Programming Contest
1024	Tester Program	927	Tehran 2002, First Iran Nationwide Internet Programming Contest
2290	House Numbers	211	Tehran 2003
2291	Rotten Ropes	3130	Tehran 2003
2292	Optimal Keypad	330	Tehran 2003
2293	Hey, Pay Day!	36	Tehran 2003
2294	Unfoldung	41	Tehran 2003
2295	A DP Problem	981	Tehran 2003
2296	Map Labeler	484	Tehran 2003
2297	Balanced Chemical Equations	75	Tehran 2003
2396	Budget	1729	Tehran 2003 Preliminary
2397	Spiderman	580	Tehran 2003 Preliminary
2398	Toy Storage	2602	Tehran 2003 Preliminary
2399	A Mayor Problem	29	Tehran 2003 Preliminary
2400	Supervisor, Supervisee	569	Tehran 2003 Preliminary
2401	Street Polygon	15	Tehran 2003 Preliminary
2402	Palindrome Numbers	1271	Tehran 2003 Preliminary
2878	IOI Photos	33	Tehran 2004
2879	Vice City	40	Tehran 2004
2880	Fixing Codes	135	Tehran 2004
2881	Wiping Words	134	Tehran 2004
2882	Food Cubes	423	Tehran 2004
2883	Points	217	Tehran 2004
2884	ACM-Telecom	21	Tehran 2004
2885	Prince of Persia	25	Tehran 2004
2894	Ancient Keyboard	1474	Tehran 2005
2895	Best SMS to Type	1477	Tehran 2005
2896	Changing Phone Numbers	134	Tehran 2005
2897	Dramatic Multiplications	888	Tehran 2005
2898	Entertainment	328	Tehran 2005
2899	Fortune at El Dorado	197	Tehran 2005
2900	Griddy Hobby	169	Tehran 2005
2901	Hotel	216	Tehran 2005
2902	Intercepting Missiles	65	Tehran 2005
2903	Joy of Mobile Routing	50	Tehran 2005
3339	Team Arrangement	546	Tehran 2006
3340	Barbara Bennett's Wild Numbers	974	Tehran 2006
3341	Calculating Taxi Fare	124	Tehran 2006
3342	Party at Hali-Bula	1694	Tehran 2006
3343	Against Mammoths	373	Tehran 2006
3344	Chessboard Dance	466	Tehran 2006
3345	Bribing FIPA	1048	Tehran 2006
3346	Treasure of the Chimp Island	250	Tehran 2006
3347	Kadj Squares	964	Tehran 2006
3331	The Idiot of the Year Contest!	1762	Tehran 2006 Preliminary
3332	Parsing Real Numbers	817	Tehran 2006 Preliminary
3333	Co-workers from Hell	240	Tehran 2006 Preliminary
3334	Connected Gheeves	262	Tehran 2006 Preliminary
3335	Rotating Scoreboard	1796	Tehran 2006 Preliminary
3336	ACM Underground	80	Tehran 2006 Preliminary
3337	Expression Evaluator	512	Tehran 2006 Preliminary
3338	Rectangle Cutting	749	Tehran 2006 Preliminary
3852	String LD	570	Tehran 2009
3853	Painting	70	Tehran 2009
3854	Another Brick in the Wall	81	Tehran 2009
3855	Blast the Enemy!	115	Tehran 2009
3856	deltree	54	Tehran 2009
3857	Solar Eclipse	29	Tehran 2009
3858	Hurry Plotter	51	Tehran 2009
3859	ACM Coalition	55	Tehran 2009
3860	Fruit Weights	69	Tehran 2009
3861	Royal Gems	26	Tehran 2009
1970	The Game	1352	Tehran Sharif 2004 Preliminary
1971	Parallelogram Counting	1237	Tehran Sharif 2004 Preliminary
1972	Dice Stacking	762	Tehran Sharif 2004 Preliminary
1973	Software Company	313	Tehran Sharif 2004 Preliminary
1974	The Happy Worm	776	Tehran Sharif 2004 Preliminary
1975	Median Weight Bead	1304	Tehran Sharif 2004 Preliminary
1976	A Mini Locomotive	1580	Tehran Sharif 2004 Preliminary
1977	Odd Loving Bakers	404	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	40	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	38	The 2006 Benelux Algorithm Programming Contest
3053	Bowling	182	The 2006 Benelux Algorithm Programming Contest
3054	High Spies	33	The 2006 Benelux Algorithm Programming Contest
3055	Digital Friends	485	The 2006 Benelux Algorithm Programming Contest
3056	The Bavarian Beer Party	281	The 2006 Benelux Algorithm Programming Contest
3057	Evacuation	697	The 2006 Benelux Algorithm Programming Contest
3058	Decompression	196	The 2006 Benelux Algorithm Programming Contest
3059	Rummikub	60	The 2006 Benelux Algorithm Programming Contest
3060	Make it Manhattan	395	The 2006 Benelux Algorithm Programming Contest
1913	Cocktails	77	TUD Programming Contest 2001, Darmstadt, Germany
1914	Cramer's Rule	624	TUD Programming Contest 2001, Darmstadt, Germany
1915	Knight Moves	7896	TUD Programming Contest 2001, Darmstadt, Germany
1916	Rat Attack	292	TUD Programming Contest 2001, Darmstadt, Germany
1917	Automatic Poetry	1062	TUD Programming Contest 2001, Darmstadt, Germany
1918	Ranking List	414	TUD Programming Contest 2001, Darmstadt, Germany
1919	Ship Journey	38	TUD Programming Contest 2001, Darmstadt, Germany
1953	World Cup Noise	8680	TUD Programming Contest 2002, Darmstadt, Germany
1954	Warez Test	17	TUD Programming Contest 2002, Darmstadt, Germany
1955	Rubik's Cube	298	TUD Programming Contest 2002, Darmstadt, Germany
1956	Pumps and Pipes	46	TUD Programming Contest 2002, Darmstadt, Germany
1958	Strange Towers of Hanoi	2337	TUD Programming Contest 2002, Darmstadt, Germany
1959	Darts	712	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	87	TUD Programming Contest 2003, Darmstadt, Germany
1804	Brainman	4982	TUD Programming Contest 2003, Darmstadt, Germany
1805	Friends	132	TUD Programming Contest 2003, Darmstadt, Germany
1806	Manhattan 2025	994	TUD Programming Contest 2003, Darmstadt, Germany
1807	Mayan Dates	41	TUD Programming Contest 2003, Darmstadt, Germany
1808	Quadratic Residues	435	TUD Programming Contest 2003, Darmstadt, Germany
1809	Regetni	518	TUD Programming Contest 2003, Darmstadt, Germany
1794	Castle Walls	526	TUD Programming Contest 2004, Darmstadt, Germany
1795	DNA Laboratory	365	TUD Programming Contest 2004, Darmstadt, Germany
1796	Extra Terrestrial PISA Test	104	TUD Programming Contest 2004, Darmstadt, Germany
1797	Heavy Transportation	6184	TUD Programming Contest 2004, Darmstadt, Germany
1798	Dory's Phonebook	44	TUD Programming Contest 2004, Darmstadt, Germany
1799	Yeehaa!	5465	TUD Programming Contest 2004, Darmstadt, Germany
1800	Magic Trick	149	TUD Programming Contest 2004, Darmstadt, Germany
1801	Formula Racing	74	TUD Programming Contest 2004, Darmstadt, Germany
2496	Military Recruit	468	TUD Programming Contest 2005 (Training Session), Darmstadt, Germany
2497	Strategies	1139	TUD Programming Contest 2005 (Training Session), Darmstadt, Germany
2498	StuPId	3199	TUD Programming Contest 2005 (Training Session), Darmstadt, Germany
2499	Binary Tree	2980	TUD Programming Contest 2005 (Training Session), Darmstadt, Germany
2500	Pia's Party	238	TUD Programming Contest 2005 (Training Session), Darmstadt, Germany
2487	Stamps	3269	TUD Programming Contest 2005, Darmstadt, Germany
2488	A Knight's Journey	12604	TUD Programming Contest 2005, Darmstadt, Germany
2489	Line Segments	181	TUD Programming Contest 2005, Darmstadt, Germany
2490	Pimp My Ride	375	TUD Programming Contest 2005, Darmstadt, Germany
2491	Scavenger Hunt	1275	TUD Programming Contest 2005, Darmstadt, Germany
2492	A Bug's Life	7574	TUD Programming Contest 2005, Darmstadt, Germany
2493	Rdeaalbe	351	TUD Programming Contest 2005, Darmstadt, Germany
2494	Acid Text	140	TUD Programming Contest 2005, Darmstadt, Germany
2495	Incomplete chess boards	1300	TUD Programming Contest 2005, Darmstadt, Germany
2917	Diophantus of Alexandria	1059	TUD Programming Contest 2006, Darmstadt, Germany
2918	Tudoku	1269	TUD Programming Contest 2006, Darmstadt, Germany
2919	Traveling Queen Problem	77	TUD Programming Contest 2006, Darmstadt, Germany
2920	Mine Map	405	TUD Programming Contest 2006, Darmstadt, Germany
2921	Knights of the Round Table	262	TUD Programming Contest 2006, Darmstadt, Germany
2922	Honeymoon Hike	653	TUD Programming Contest 2006, Darmstadt, Germany
2923	Relocation	787	TUD Programming Contest 2006, Darmstadt, Germany
2924	Gauß in Elementary School	3804	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	707	Ural Collegiate Programming Contest 1998
2620	Minimal coverage	589	Ural Collegiate Programming Contest 1998
2621	Parallelepiped	44	Ural Collegiate Programming Contest 1998
2622	Convex hull	67	Ural Collegiate Programming Contest 1998
2623	Sequence Median	3211	Ural Collegiate Programming Contest 1998
1257	Cross-stitch.	113	Ural Collegiate Programming Contest 1999
2352	Stars	11752	Ural Collegiate Programming Contest 1999
2353	Ministry	1126	Ural Collegiate Programming Contest 1999
2354	Titanic	448	Ural Collegiate Programming Contest 1999
2355	Railway tickets	764	Ural Collegiate Programming Contest 1999
2356	Find a multiple	2735	Ural Collegiate Programming Contest 1999
2357	Labyrinth	290	Ural Collegiate Programming Contest 1999
2358	Queens in peaceful positions	312	Ural Collegiate Programming Contest 1999
2359	Questions	507	Ural Collegiate Programming Contest 1999,trial tour
2599	A funny game	576	Ural State University collegiate programming contest 2000
2600	Geometrical dreams	247	Ural State University collegiate programming contest 2000
2601	Simple calculations	2933	Ural State University collegiate programming contest 2000
2602	Superlong sums	4403	Ural State University collegiate programming contest 2000
2603	Brave balloonists	1793	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	3319	Ural State University collegiate programming contest 2000
2365	Rope	2096	Ural State University Internal Contest October'2000 Junior Session
2366	Sacrament of the sum	2388	Ural State University Internal Contest October'2000 Junior Session
2367	Genealogical tree	3876	Ural State University Internal Contest October'2000 Junior Session
2368	Buttons	811	Ural State University Internal Contest October'2000 Junior Session
2369	Permutations	1379	Ural State University Internal Contest October'2000 Junior Session
2370	Democracy in danger	2256	Ural State University Internal Contest October'2000 Junior Session
2371	Questions and answers	4614	Ural State University Internal Contest October'2000 Junior Session
2372	D++ Again	147	Ural State University Internal Contest October'2000 Junior Session
2340	Memory management	169	Ural State University Internal Contest October'2000 Students Session
2341	Spell checker	226	Ural State University Internal Contest October'2000 Students Session
2342	Anniversary party	4167	Ural State University Internal Contest October'2000 Students Session
2343	Airline company	104	Ural State University Internal Contest October'2000 Students Session
2344	Nikifor	78	Ural State University Internal Contest October'2000 Students Session
2345	Central heating	307	Ural State University Internal Contest October'2000 Students Session
2346	Lucky tickets	1812	Ural State University Internal Contest October'2000 Students Session
1266	Cover an Arc.	248	Ural State University Internal Contest October'2000 Students Session (URAL 1043)
2188	Cow Laundry	780	USACO 2003 Fall Orange
2189	Romeo Meets Juliet	603	USACO 2003 Fall Orange
2190	ISBN	4953	USACO 2003 Fall Orange
2132	Cow Math	516	USACO 2003 February Green
2133	Cow Imposters	407	USACO 2003 February Green
2134	Traffic Lights	131	USACO 2003 February Green
2135	Farm Tour	3970	USACO 2003 February Green
2136	Vertical Histogram	8201	USACO 2003 February Orange
2137	Cowties	888	USACO 2003 February Orange
2138	Travel Games	1163	USACO 2003 February Orange
2018	Best Cow Fences	2997	USACO 2003 March Green
2019	Cornfields	2536	USACO 2003 March Green
2139	Six Degrees of Cowvin Bacon	3150	USACO 2003 March Orange
2140	Herd Sums	8591	USACO 2003 March Orange
2141	Message Decowding	6346	USACO 2003 March Orange
2110	Mountain Walking	1156	USACO 2003 U S Open
2111	Millenium Leapcow	599	USACO 2003 U S Open
2112	Optimal Milking	3346	USACO 2003 U S Open
2180	Bale Figures	344	USACO 2003 U S Open Orange
2181	Jumping Cows	3352	USACO 2003 U S Open Orange
2182	Lost Cows	5913	USACO 2003 U S Open Orange
2183	Bovine Math Geniuses	1478	USACO 2003 U S Open Orange
2008	Moo University - Team Tryouts	680	USACO 2004 March Green
2009	Moo University - Emergency Pizza Order	206	USACO 2004 March Green
2010	Moo University - Financial Aid	2223	USACO 2004 March Green
2385	Apple Catching	4996	USACO 2004 November
2386	Lake Counting	15842	USACO 2004 November
2387	Til the Cows Come Home	10437	USACO 2004 November
2388	Who's in the Middle	17588	USACO 2004 November
2389	Bull Math	7883	USACO 2004 November
2390	Bank Interest	8249	USACO 2004 November
1988	Cube Stacking	6141	USACO 2004 U S Open
1989	The Cow Lineup	2489	USACO 2004 U S Open
1990	MooFest	3099	USACO 2004 U S Open
1991	Turning in Homework	403	USACO 2004 U S Open
3174	Alignment of the Planets	752	USACO 2005 December Bronze
3175	Finding Bovine Roots	693	USACO 2005 December Bronze
3176	Cow Bowling	10770	USACO 2005 December Bronze
2226	Muddy Fields	3029	USACO 2005 January Gold
2227	The Wedding Juicer	1155	USACO 2005 January Gold
2228	Naptime	2078	USACO 2005 January Gold
2229	Sumsets	6009	USACO 2005 January Silver
2230	Watchcow	2469	USACO 2005 January Silver
2231	Moo Volume	4726	USACO 2005 January Silver
3049	Securing the Barn	1203	USACO 2005 November Bronze
3050	Hopscotch	2770	USACO 2005 November Bronze
3051	Satellite Photographs	2195	USACO 2005 November Bronze
3041	Asteroids	9647	USACO 2005 November Gold
3042	Grazing on the Run	769	USACO 2005 November Gold
3043	Walk the Talk	202	USACO 2005 November Gold
3044	City Skyline	1338	USACO 2005 November Silver
3045	Cow Acrobats	1977	USACO 2005 November Silver
3046	Ant Counting	1882	USACO 2005 November Silver
3047	Bovine Birthday	878	USACO 2005 October Bronze
3048	Max Factor	2199	USACO 2005 October Bronze
2430	Lazy Cows	772	USACO 2005 U S Open Gold
2431	Expedition	4872	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	477	USACO 2005 U S Open Silver
2436	Disease Management	1464	USACO 2005 U S Open Silver
2437	Muddy roads	1136	USACO 2005 U S Open Silver
3173	Parkside's Triangle	4365	USACO 2006 December Bronze
3191	The Moronic Cowmpouter	1480	USACO 2006 February Bronze
3192	DNA Assembly	762	USACO 2006 February Bronze
3193	Cow Phrasebook	842	USACO 2006 February Bronze
3183	Stump Removal	1464	USACO 2006 January Bronze
3184	Finicky Grazers	369	USACO 2006 January Bronze
3185	The Water Bowls	2026	USACO 2006 January Bronze
3177	Redundant Paths	3884	USACO 2006 January Gold
3178	Roping the Field	228	USACO 2006 January Gold
3179	Corral the Cows	609	USACO 2006 January Gold
3180	The Cow Prom	1142	USACO 2006 January Silver
3181	Dollar Dayz	2206	USACO 2006 January Silver
3182	The Grove	391	USACO 2006 January Silver
3253	Fence Repair	13486	USACO 2006 November Gold
3254	Corn Fields	5865	USACO 2006 November Gold
3255	Roadblocks	4608	USACO 2006 November Gold
3250	Bad Hair Day	5220	USACO 2006 November Silver
3251	Big Square	691	USACO 2006 November Silver
3252	Round Numbers	4092	USACO 2006 November Silver
3627	Bookshelf	4135	USACO 2007 December Bronze
3628	Bookshelf 2	3063	USACO 2007 December Bronze
3629	Card Stacking	1794	USACO 2007 December Bronze
3265	Problem Solving	600	USACO 2007 January Gold
3266	Cow School	206	USACO 2007 January Gold
3262	Protecting the Flowers	4469	USACO 2007 January Silver
3263	Tallest Cow	1926	USACO 2007 January Silver
3264	Balanced Lineup	13369	USACO 2007 January Silver
3618	Exploration	1824	USACO 2007 November Bronze
3619	Speed Reading	3597	USACO 2007 November Bronze
3620	Avoid The Lakes	3468	USACO 2007 November Bronze
3612	Telephone Wire	828	USACO 2007 November Gold
3613	Cow Relays	2140	USACO 2007 November Gold
3614	Sunscreen	3039	USACO 2007 November Gold
3615	Cow Hurdles	2510	USACO 2007 November Silver
3616	Milking Time	4887	USACO 2007 November Silver
3617	Best Cow Line	7085	USACO 2007 November Silver
3280	Cheapest Palindrome	4270	USACO 2007 Open Gold
3281	Dining	4867	USACO 2007 Open Gold
3277	City Horizon	3069	USACO 2007 Open Silver
3278	Catch That Cow	19910	USACO 2007 Open Silver
3279	Fliptile	3211	USACO 2007 Open Silver
3671	Dining Cows	2594	USACO 2008 February Bronze
3672	Long Distance Racing	3682	USACO 2008 February Bronze
3673	Cow Multiplication	7494	USACO 2008 February Bronze
3663	Costume Party	4630	USACO 2008 January Bronze
3664	Election Time	3865	USACO 2008 January Bronze
3665	iCow	1960	USACO 2008 January Bronze
3658	Artificial Lake	469	USACO 2008 January Gold
3657	Haybale Guessing	443	USACO 2008 January Gold
3659	Cell Phone Network	1829	USACO 2008 January Gold
3660	Cow Contest	5515	USACO 2008 January Silver
3661	Running	2005	USACO 2008 January Silver
3662	Telephone Lines	2279	USACO 2008 January Silver
3282	Ferry Loading IV	749	Waterloo Local Contest, 2006.5.27
3283	Card Hands	555	Waterloo Local Contest, 2006.5.27
3284	Eventually periodic sequence	130	Waterloo Local Contest, 2006.5.27
3285	Point of view in Flatland	126	Waterloo Local Contest, 2006.5.27
3286	How many 0's?	1377	Waterloo Local Contest, 2006.5.27
3287	The Trip, 2007	389	Waterloo Local Contest, 2006.9.24
3288	Mall Mania	255	Waterloo Local Contest, 2006.9.24
3289	Moonshine	72	Waterloo Local Contest, 2006.9.24
3290	WFF 'N PROOF	349	Waterloo Local Contest, 2006.9.24
3291	Cousins	208	Waterloo Local Contest, 2006.9.24
3292	Semi-prime H-numbers	3395	Waterloo Local Contest, 2006.9.30
3293	Rectilinear polygon	192	Waterloo Local Contest, 2006.9.30
3294	Life Forms	2327	Waterloo Local Contest, 2006.9.30
3295	Tautology	5362	Waterloo Local Contest, 2006.9.30
3296	Rinse	179	Waterloo Local Contest, 2006.9.30
3297	Open Source	607	Waterloo Local Contest, 2007.7.14
3298	Antimonotonicity	1000	Waterloo Local Contest, 2007.7.14
3299	Humidex	7031	Waterloo Local Contest, 2007.7.14
3300	Tour de France	1848	Waterloo Local Contest, 2007.7.14
3301	Texas Trip	1059	Waterloo Local Contest, 2007.7.14
3639	Exchange Rates	763	Waterloo Local Contest, 2007.9.23
3640	Conformity	764	Waterloo Local Contest, 2007.9.23
3641	Pseudoprime numbers	3206	Waterloo Local Contest, 2007.9.23
3642	Carpool	121	Waterloo Local Contest, 2007.9.23
3643	Friend or Foe?	187	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	1494	Waterloo Local Contest, 2007.9.29
3647	Tournament	102	Waterloo Local Contest, 2007.9.29
3648	Wedding	1690	Waterloo Local Contest, 2007.9.29
1886	Borrowers	283	World Finals 1994
1887	Testing the CATCHER	4446	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	22	World Finals 1994
1892	VTAS - Vessel Traffic Advisory Service	4	World Finals 1994
1893	Monitoring Wheelchair Patients	51	World Finals 1994
1878	Jill's Bike	281	World Finals 1995
1879	Tempus et mobilius Time and motion	419	World Finals 1995
1880	Variable Radix Huffman Encoding	168	World Finals 1995
1881	Sail Race	20	World Finals 1995
1882	Stamps	427	World Finals 1995
1883	Theseus and the Minotaur	27	World Finals 1995
1884	Train Time	32	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	228	World Finals 1999
1873	The Fortified Forest	1256	World Finals 1999
1874	Trade on Verweggistan	416	World Finals 1999
1875	Robot	33	World Finals 1999
1876	The Letter Carrier's Rounds	84	World Finals 1999
1877	Flooded!	1316	World Finals 1999
1286	Necklace of Beads	3013	Xi'an 2002
1348	Computing	225	Xi'an 2002
1349	Coding of Permutations	360	Xi'an 2002
1350	Cabric Number Problem	2829	Xi'an 2002
1351	Number of Locks	613	Xi'an 2002
1352	Quantity of White Mice	132	Xi'an 2002
1353	Color Change of Go Game Pieces	291	Xi'an 2002
1354	Placement of Keys	746	Xi'an 2002
1355	Selecting the Optimal Teaching Fiends	110	Xi'an 2002

Total 2449 Problems match!

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