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| Online Judge | Problem Set | Authors | Online Contests | User | ||||||
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| Web Board Home Page F.A.Qs Statistical Charts | Current Contest Past Contests Scheduled Contests Award Contest | |||||||||
| ID | Title | Ratio(AC/submit) | Date |
| 2000 | Gold Coins | 60%(16891/27875) | Oct 10, 2026 |
| 2001 | Shortest Prefixes | 40%(13149/32572) | Oct 13, 2026 |
| 2002 | Squares | 37%(9463/24938) | Oct 20, 2026 |
| 2003 | Hire and Fire | 28%(915/3204) | Oct 10, 2026 |
| 2004 | Mix and Build | 30%(1315/4312) | Oct 10, 2026 |
| 2005 | Blackjack | 27%(657/2367) | Oct 10, 2026 |
| 2006 | Litmus Test | 49%(1106/2218) | Oct 10, 2026 |
| 2007 | Scrambled Polygon | 45%(5966/13151) | Oct 10, 2026 |
| 2008 | Moo University - Team Tryouts | 29%(1360/4629) | Oct 10, 2026 |
| 2009 | Moo University - Emergency Pizza Order | 22%(410/1830) | Oct 10, 2026 |
| 2010 | Moo University - Financial Aid | 29%(4949/16688) | Oct 18, 2026 |
| 2011 | Primary X-Subfactor Series | 43%(192/437) | Oct 10, 2026 |
| 2012 | Triangle Cuts | 14%(42/293) | Oct 16, 2026 |
| 2013 | Symmetric Order | 55%(10124/18111) | Oct 15, 2026 |
| 2014 | Flow Layout | 68%(2433/3527) | Oct 10, 2026 |
| 2015 | Permutation Code | 45%(567/1253) | Oct 10, 2026 |
| 2016 | Ink Blots | 16%(69/407) | Oct 16, 2026 |
| 2017 | Speed Limit | 67%(16112/23869) | Oct 10, 2026 |
| 2018 | Best Cow Fences | 30%(7655/24753) | Oct 12, 2026 |
| 2019 | Cornfields | 45%(5481/12007) | Oct 10, 2026 |
| 2020 | MisLED | 28%(201/703) | Oct 21, 2026 |
| 2021 | Relative Relatives | 43%(1795/4094) | Oct 10, 2026 |
| 2022 | Syntax Included | 26%(258/975) | Oct 10, 2026 |
| 2023 | Choose Your Own Adventure | 40%(792/1941) | Oct 10, 2026 |
| 2024 | Know When to Hold 'em | 30%(54/177) | Oct 16, 2026 |
| 2025 | Cubic Rube | 22%(68/300) | Oct 16, 2026 |
| 2026 | As the Crow Flies | 47%(169/359) | Oct 10, 2026 |
| 2027 | No Brainer | 65%(19443/29682) | Oct 10, 2026 |
| 2028 | When Can We Meet? | 54%(3384/6216) | Oct 13, 2026 |
| 2029 | Get Many Persimmon Trees | 64%(3694/5732) | Oct 10, 2026 |
| 2030 | The Secret Number | 34%(800/2347) | Oct 13, 2026 |
| 2031 | Building a Space Station | 44%(10217/23186) | Oct 13, 2026 |
| 2032 | Square Carpets | 34%(343/989) | Oct 10, 2026 |
| 2033 | Alphacode | 29%(4883/16372) | Oct 10, 2026 |
| 2034 | Anti-prime Sequences | 45%(2227/4851) | Oct 15, 2026 |
| 2035 | Hit or Miss | 35%(213/598) | Oct 13, 2026 |
| 2036 | I Conduit! | 19%(402/2095) | Oct 10, 2026 |
| 2037 | Roll Playing Games | 14%(112/784) | Oct 19, 2026 |
| 2038 | Team Rankings | 49%(1188/2400) | Oct 10, 2026 |
| 2039 | To and Fro | 66%(6662/9960) | Oct 10, 2026 |
| 2040 | Translations | 34%(234/675) | Oct 10, 2026 |
| 2041 | Unreliable Message | 60%(1444/2405) | Oct 10, 2026 |
| 2042 | Lagrange's Four-Square Theorem | 45%(1438/3159) | Oct 10, 2026 |
| 2043 | Area of Polygons | 39%(444/1136) | Oct 10, 2026 |
| 2044 | Weather Forecast | 33%(1201/3585) | Oct 10, 2026 |
| 2045 | Molecular Formula | 49%(471/954) | Oct 10, 2026 |
| 2046 | Gap | 46%(1065/2280) | Oct 10, 2026 |
| 2047 | Concert Hall Scheduling | 44%(687/1554) | Oct 10, 2026 |
| 2048 | Monster Trap | 24%(278/1115) | Oct 10, 2026 |
| 2049 | Finding Nemo | 29%(4002/13630) | Oct 10, 2026 |
| 2050 | Searching the Web | 20%(507/2458) | Oct 10, 2026 |
| 2051 | Argus | 49%(6427/12929) | Oct 10, 2026 |
| 2052 | Fun Game | 24%(304/1236) | Oct 11, 2026 |
| 2053 | Square | 21%(258/1184) | Oct 11, 2026 |
| 2054 | Color a Tree | 33%(3697/10996) | Oct 11, 2026 |
| 2055 | Kid's Problem | 23%(215/933) | Oct 21, 2026 |
| 2056 | The Separator in Grid | 31%(907/2914) | Oct 11, 2026 |
| 2057 | The Lost House | 41%(1402/3358) | Oct 21, 2026 |
| 2058 | Word Encoding | 37%(133/352) | Oct 21, 2026 |
| 2059 | Watchdog | 61%(918/1502) | Oct 11, 2026 |
| 2060 | Taxi Cab Scheme | 40%(3404/8480) | Oct 11, 2026 |
| 2061 | Pseudo-random Numbers | 24%(135/558) | Oct 21, 2026 |
| 2062 | Card Game Cheater | 50%(1207/2398) | Oct 21, 2026 |
| 2063 | Investment | 34%(5130/14876) | Oct 10, 2026 |
| 2064 | Pipes | 47%(230/489) | Oct 21, 2026 |
| 2065 | SETI | 61%(1780/2904) | Oct 13, 2026 |
| 2066 | Minimax Triangulation | 27%(386/1404) | Oct 11, 2026 |
| 2067 | Young, Poor and Busy | 38%(116/303) | Oct 21, 2026 |
| 2068 | Nim | 55%(1553/2803) | Oct 11, 2026 |
| 2069 | Super Star | 24%(2247/9343) | Oct 21, 2026 |
| 2070 | Filling Out the Team | 55%(5743/10313) | Oct 11, 2026 |
| 2071 | Auctions R Us | 29%(134/461) | Oct 21, 2026 |
| 2072 | GHOST | 16%(43/254) | Oct 21, 2026 |
| 2073 | Doggone Moles | 34%(115/335) | Oct 21, 2026 |
| 2074 | Line of Sight | 28%(1901/6605) | Oct 21, 2026 |
| 2075 | Tangled in Cables | 39%(2810/7203) | Oct 11, 2026 |
| 2076 | All Roads Lead to Albuquerque, er, Rome | 18%(65/357) | Oct 21, 2026 |
| 2077 | Balanced Budget Initiative | 19%(52/264) | Oct 21, 2026 |
| 2078 | Matrix | 53%(2658/5011) | Oct 11, 2026 |
| 2079 | Triangle | 29%(3884/13036) | Oct 11, 2026 |
| 2080 | Calendar | 34%(6498/19067) | Oct 21, 2026 |
| 2081 | Recaman's Sequence | 43%(10664/24445) | Oct 10, 2026 |
| 2082 | Terrible Sets | 50%(3346/6565) | Oct 13, 2026 |
| 2083 | Fractal | 38%(12834/33321) | Oct 15, 2026 |
| 2084 | Game of Connections | 47%(4971/10552) | Oct 12, 2026 |
| 2085 | Inversion | 43%(2102/4811) | Oct 10, 2026 |
| 2086 | Land Division Tax | 42%(369/859) | Oct 10, 2026 |
| 2087 | Petanque | 31%(89/283) | Oct 21, 2026 |
| 2088 | Long Night of Museums | 21%(359/1701) | Oct 10, 2026 |
| 2089 | Magic Trick | 52%(327/618) | Oct 10, 2026 |
| 2090 | Two-Stacks Solitaire | 22%(196/855) | Oct 18, 2026 |
| 2091 | Zing Zhu's Oyster Farm | 22%(82/369) | Oct 16, 2026 |
| 2092 | Grandpa is Famous | 44%(6531/14793) | Oct 10, 2026 |
| 2093 | Cutting Edge | 25%(63/243) | Oct 16, 2026 |
| 2094 | Angry Teacher | 18%(231/1258) | Oct 16, 2026 |
| 2095 | Beth Tableaux | 17%(38/221) | Oct 21, 2026 |
| 2096 | Collecting Bugs | 42%(6754/16051) | Oct 21, 2026 |
| 2097 | Drawing Windows | 22%(27/121) | Oct 21, 2026 |
| 2098 | Ellipse | 15%(131/870) | Oct 21, 2026 |
| 2099 | Fool's Day | 7%(45/593) | Oct 21, 2026 |
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