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| Online Judge | Problem Set | Authors | Online Contests | User | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| 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%(16784/27730) | Jan 8, 2026 |
| 2001 | Shortest Prefixes | 40%(13115/32519) | Jan 8, 2026 |
| 2002 | Squares | 37%(9449/24908) | Jan 8, 2026 |
| 2003 | Hire and Fire | 28%(913/3201) | Dec 17, 2025 |
| 2004 | Mix and Build | 30%(1306/4297) | Jan 8, 2026 |
| 2005 | Blackjack | 27%(646/2356) | Jan 8, 2026 |
| 2006 | Litmus Test | 49%(1102/2214) | Nov 20, 2025 |
| 2007 | Scrambled Polygon | 45%(5953/13128) | Nov 20, 2025 |
| 2008 | Moo University - Team Tryouts | 29%(1349/4613) | Dec 9, 2025 |
| 2009 | Moo University - Emergency Pizza Order | 22%(403/1806) | Jan 8, 2026 |
| 2010 | Moo University - Financial Aid | 29%(4930/16634) | Jan 8, 2026 |
| 2011 | Primary X-Subfactor Series | 43%(183/424) | Jan 8, 2026 |
| 2012 | Triangle Cuts | 12%(37/287) | Dec 9, 2025 |
| 2013 | Symmetric Order | 55%(10094/18076) | Jan 8, 2026 |
| 2014 | Flow Layout | 68%(2431/3525) | Nov 20, 2025 |
| 2015 | Permutation Code | 45%(559/1240) | Jan 8, 2026 |
| 2016 | Ink Blots | 16%(64/397) | Dec 9, 2025 |
| 2017 | Speed Limit | 67%(16080/23835) | Jan 7, 2026 |
| 2018 | Best Cow Fences | 30%(7623/24662) | Dec 15, 2025 |
| 2019 | Cornfields | 45%(5458/11975) | Dec 17, 2025 |
| 2020 | MisLED | 28%(199/697) | Dec 9, 2025 |
| 2021 | Relative Relatives | 43%(1786/4080) | Nov 21, 2025 |
| 2022 | Syntax Included | 26%(256/968) | Dec 9, 2025 |
| 2023 | Choose Your Own Adventure | 40%(786/1930) | Nov 20, 2025 |
| 2024 | Know When to Hold 'em | 30%(52/173) | Dec 9, 2025 |
| 2025 | Cubic Rube | 21%(62/290) | Dec 9, 2025 |
| 2026 | As the Crow Flies | 46%(167/357) | Nov 21, 2025 |
| 2027 | No Brainer | 65%(19424/29662) | Jan 7, 2026 |
| 2028 | When Can We Meet? | 54%(3372/6203) | Nov 20, 2025 |
| 2029 | Get Many Persimmon Trees | 64%(3686/5721) | Dec 23, 2025 |
| 2030 | The Secret Number | 34%(797/2344) | Nov 21, 2025 |
| 2031 | Building a Space Station | 43%(10059/23012) | Jan 7, 2026 |
| 2032 | Square Carpets | 34%(338/981) | Nov 21, 2025 |
| 2033 | Alphacode | 29%(4867/16349) | Jan 7, 2026 |
| 2034 | Anti-prime Sequences | 45%(2215/4835) | Jan 8, 2026 |
| 2035 | Hit or Miss | 35%(211/594) | Jan 8, 2026 |
| 2036 | I Conduit! | 18%(395/2084) | Nov 21, 2025 |
| 2037 | Roll Playing Games | 13%(106/764) | Dec 1, 2025 |
| 2038 | Team Rankings | 49%(1178/2385) | Nov 20, 2025 |
| 2039 | To and Fro | 66%(6647/9942) | Jan 7, 2026 |
| 2040 | Translations | 34%(228/665) | Dec 1, 2025 |
| 2041 | Unreliable Message | 60%(1437/2394) | Jan 8, 2026 |
| 2042 | Lagrange's Four-Square Theorem | 45%(1423/3143) | Jan 9, 2026 |
| 2043 | Area of Polygons | 38%(438/1130) | Dec 9, 2025 |
| 2044 | Weather Forecast | 33%(1196/3580) | Dec 9, 2025 |
| 2045 | Molecular Formula | 49%(469/950) | Nov 20, 2025 |
| 2046 | Gap | 46%(1060/2275) | Dec 9, 2025 |
| 2047 | Concert Hall Scheduling | 44%(679/1541) | Jan 8, 2026 |
| 2048 | Monster Trap | 24%(270/1107) | Dec 9, 2025 |
| 2049 | Finding Nemo | 30%(3923/13015) | Dec 25, 2025 |
| 2050 | Searching the Web | 20%(506/2456) | Dec 9, 2025 |
| 2051 | Argus | 49%(6412/12910) | Nov 21, 2025 |
| 2052 | Fun Game | 24%(299/1230) | Dec 9, 2025 |
| 2053 | Square | 21%(253/1167) | Dec 9, 2025 |
| 2054 | Color a Tree | 33%(3675/10933) | Dec 9, 2025 |
| 2055 | Kid's Problem | 22%(209/922) | Dec 9, 2025 |
| 2056 | The Separator in Grid | 31%(906/2912) | Dec 9, 2025 |
| 2057 | The Lost House | 41%(1395/3351) | Dec 9, 2025 |
| 2058 | Word Encoding | 37%(127/342) | Nov 21, 2025 |
| 2059 | Watchdog | 61%(909/1487) | Nov 20, 2025 |
| 2060 | Taxi Cab Scheme | 39%(3381/8453) | Nov 20, 2025 |
| 2061 | Pseudo-random Numbers | 23%(130/552) | Dec 9, 2025 |
| 2062 | Card Game Cheater | 50%(1197/2382) | Nov 21, 2025 |
| 2063 | Investment | 34%(5118/14853) | Jan 8, 2026 |
| 2064 | Pipes | 46%(225/480) | Dec 9, 2025 |
| 2065 | SETI | 61%(1768/2891) | Jan 8, 2026 |
| 2066 | Minimax Triangulation | 27%(381/1397) | Nov 21, 2025 |
| 2067 | Young, Poor and Busy | 38%(113/294) | Jan 7, 2026 |
| 2068 | Nim | 55%(1537/2782) | Jan 8, 2026 |
| 2069 | Super Star | 23%(2230/9318) | Jan 8, 2026 |
| 2070 | Filling Out the Team | 55%(5741/10311) | Dec 9, 2025 |
| 2071 | Auctions R Us | 28%(130/452) | Jan 8, 2026 |
| 2072 | GHOST | 15%(38/246) | Dec 9, 2025 |
| 2073 | Doggone Moles | 33%(113/333) | Jan 7, 2026 |
| 2074 | Line of Sight | 28%(1882/6558) | Dec 14, 2025 |
| 2075 | Tangled in Cables | 38%(2798/7186) | Jan 7, 2026 |
| 2076 | All Roads Lead to Albuquerque, er, Rome | 18%(63/346) | Dec 9, 2025 |
| 2077 | Balanced Budget Initiative | 19%(49/257) | Dec 1, 2025 |
| 2078 | Matrix | 53%(2653/5005) | Nov 20, 2025 |
| 2079 | Triangle | 29%(3844/12957) | Jan 8, 2026 |
| 2080 | Calendar | 34%(6478/19035) | Jan 8, 2026 |
| 2081 | Recaman's Sequence | 43%(10634/24395) | Dec 10, 2025 |
| 2082 | Terrible Sets | 50%(3328/6540) | Jan 8, 2026 |
| 2083 | Fractal | 37%(12341/32590) | Jan 8, 2026 |
| 2084 | Game of Connections | 47%(4959/10532) | Jan 5, 2026 |
| 2085 | Inversion | 43%(2087/4791) | Nov 20, 2025 |
| 2086 | Land Division Tax | 42%(362/852) | Nov 21, 2025 |
| 2087 | Petanque | 31%(86/276) | Dec 9, 2025 |
| 2088 | Long Night of Museums | 20%(354/1686) | Jan 7, 2026 |
| 2089 | Magic Trick | 52%(314/601) | Jan 8, 2026 |
| 2090 | Two-Stacks Solitaire | 22%(194/853) | Dec 9, 2025 |
| 2091 | Zing Zhu's Oyster Farm | 21%(79/366) | Dec 9, 2025 |
| 2092 | Grandpa is Famous | 43%(6238/14406) | Nov 20, 2025 |
| 2093 | Cutting Edge | 24%(58/233) | Dec 9, 2025 |
| 2094 | Angry Teacher | 17%(225/1251) | Jan 8, 2026 |
| 2095 | Beth Tableaux | 17%(37/213) | Dec 9, 2025 |
| 2096 | Collecting Bugs | 43%(6721/15453) | Jan 10, 2026 |
| 2097 | Drawing Windows | 23%(26/112) | Jan 8, 2026 |
| 2098 | Ellipse | 15%(130/858) | Jan 8, 2026 |
| 2099 | Fool's Day | 7%(42/584) | Jan 8, 2026 |
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