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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%(16789/27735) | Mar 5, 2026 |
| 2001 | Shortest Prefixes | 40%(13116/32526) | Mar 5, 2026 |
| 2002 | Squares | 37%(9450/24915) | Mar 5, 2026 |
| 2003 | Hire and Fire | 28%(913/3201) | Dec 17, 2025 |
| 2004 | Mix and Build | 30%(1306/4302) | Mar 5, 2026 |
| 2005 | Blackjack | 27%(648/2358) | Mar 5, 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%(1349/4618) | Mar 5, 2026 |
| 2009 | Moo University - Emergency Pizza Order | 22%(403/1813) | Mar 5, 2026 |
| 2010 | Moo University - Financial Aid | 29%(4930/16639) | Mar 5, 2026 |
| 2011 | Primary X-Subfactor Series | 42%(183/426) | Mar 5, 2026 |
| 2012 | Triangle Cuts | 12%(37/287) | Dec 9, 2025 |
| 2013 | Symmetric Order | 55%(10099/18082) | Mar 5, 2026 |
| 2014 | Flow Layout | 68%(2431/3525) | Nov 20, 2025 |
| 2015 | Permutation Code | 44%(559/1245) | Mar 5, 2026 |
| 2016 | Ink Blots | 16%(64/397) | Dec 9, 2025 |
| 2017 | Speed Limit | 67%(16088/23843) | Mar 5, 2026 |
| 2018 | Best Cow Fences | 30%(7623/24669) | Mar 5, 2026 |
| 2019 | Cornfields | 45%(5459/11983) | Mar 6, 2026 |
| 2020 | MisLED | 28%(199/697) | Dec 9, 2025 |
| 2021 | Relative Relatives | 43%(1786/4085) | Mar 5, 2026 |
| 2022 | Syntax Included | 26%(256/968) | Dec 9, 2025 |
| 2023 | Choose Your Own Adventure | 40%(786/1932) | Mar 5, 2026 |
| 2024 | Know When to Hold 'em | 29%(52/175) | Mar 5, 2026 |
| 2025 | Cubic Rube | 21%(62/293) | Mar 5, 2026 |
| 2026 | As the Crow Flies | 46%(167/357) | Nov 21, 2025 |
| 2027 | No Brainer | 65%(19430/29668) | Mar 5, 2026 |
| 2028 | When Can We Meet? | 54%(3376/6208) | Mar 5, 2026 |
| 2029 | Get Many Persimmon Trees | 64%(3687/5722) | Jan 28, 2026 |
| 2030 | The Secret Number | 34%(797/2344) | Nov 21, 2025 |
| 2031 | Building a Space Station | 43%(10062/23021) | Mar 5, 2026 |
| 2032 | Square Carpets | 34%(338/981) | Nov 21, 2025 |
| 2033 | Alphacode | 29%(4874/16362) | Mar 6, 2026 |
| 2034 | Anti-prime Sequences | 45%(2217/4840) | Mar 5, 2026 |
| 2035 | Hit or Miss | 35%(211/595) | Mar 4, 2026 |
| 2036 | I Conduit! | 18%(395/2088) | Mar 5, 2026 |
| 2037 | Roll Playing Games | 13%(106/769) | Mar 5, 2026 |
| 2038 | Team Rankings | 49%(1178/2390) | Mar 5, 2026 |
| 2039 | To and Fro | 66%(6649/9947) | Mar 5, 2026 |
| 2040 | Translations | 34%(228/669) | Mar 5, 2026 |
| 2041 | Unreliable Message | 59%(1437/2398) | Mar 5, 2026 |
| 2042 | Lagrange's Four-Square Theorem | 45%(1427/3147) | Mar 5, 2026 |
| 2043 | Area of Polygons | 38%(438/1130) | Dec 9, 2025 |
| 2044 | Weather Forecast | 33%(1196/3580) | Dec 9, 2025 |
| 2045 | Molecular Formula | 49%(469/952) | Mar 5, 2026 |
| 2046 | Gap | 46%(1060/2275) | Dec 9, 2025 |
| 2047 | Concert Hall Scheduling | 43%(679/1546) | Mar 5, 2026 |
| 2048 | Monster Trap | 24%(270/1107) | Dec 9, 2025 |
| 2049 | Finding Nemo | 30%(3924/13018) | Feb 4, 2026 |
| 2050 | Searching the Web | 20%(506/2456) | Dec 9, 2025 |
| 2051 | Argus | 49%(6412/12913) | Mar 5, 2026 |
| 2052 | Fun Game | 24%(299/1230) | Dec 9, 2025 |
| 2053 | Square | 21%(253/1167) | Dec 9, 2025 |
| 2054 | Color a Tree | 33%(3677/10945) | Jan 29, 2026 |
| 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 | 36%(127/346) | Mar 5, 2026 |
| 2059 | Watchdog | 60%(909/1492) | Mar 5, 2026 |
| 2060 | Taxi Cab Scheme | 39%(3381/8457) | Mar 5, 2026 |
| 2061 | Pseudo-random Numbers | 23%(130/553) | Mar 4, 2026 |
| 2062 | Card Game Cheater | 50%(1200/2388) | Mar 5, 2026 |
| 2063 | Investment | 34%(5121/14858) | Mar 5, 2026 |
| 2064 | Pipes | 46%(225/483) | Mar 5, 2026 |
| 2065 | SETI | 61%(1768/2891) | Jan 8, 2026 |
| 2066 | Minimax Triangulation | 27%(381/1397) | Nov 21, 2025 |
| 2067 | Young, Poor and Busy | 38%(113/297) | Mar 5, 2026 |
| 2068 | Nim | 55%(1537/2787) | Mar 5, 2026 |
| 2069 | Super Star | 23%(2232/9320) | Feb 27, 2026 |
| 2070 | Filling Out the Team | 55%(5741/10311) | Dec 9, 2025 |
| 2071 | Auctions R Us | 28%(130/457) | Mar 5, 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%(2798/7191) | Mar 5, 2026 |
| 2076 | All Roads Lead to Albuquerque, er, Rome | 18%(63/348) | Mar 5, 2026 |
| 2077 | Balanced Budget Initiative | 18%(49/261) | Mar 5, 2026 |
| 2078 | Matrix | 53%(2653/5005) | Nov 20, 2025 |
| 2079 | Triangle | 29%(3846/12962) | Mar 5, 2026 |
| 2080 | Calendar | 34%(6483/19044) | Mar 5, 2026 |
| 2081 | Recaman's Sequence | 43%(10634/24395) | Dec 10, 2025 |
| 2082 | Terrible Sets | 50%(3330/6546) | Mar 5, 2026 |
| 2083 | Fractal | 37%(12344/32596) | Mar 5, 2026 |
| 2084 | Game of Connections | 47%(4962/10537) | Mar 5, 2026 |
| 2085 | Inversion | 43%(2090/4796) | Mar 5, 2026 |
| 2086 | Land Division Tax | 42%(362/852) | Nov 21, 2025 |
| 2087 | Petanque | 31%(86/276) | Dec 9, 2025 |
| 2088 | Long Night of Museums | 20%(354/1691) | Mar 5, 2026 |
| 2089 | Magic Trick | 52%(315/604) | Mar 5, 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%(6239/14411) | Mar 5, 2026 |
| 2093 | Cutting Edge | 24%(58/233) | Dec 9, 2025 |
| 2094 | Angry Teacher | 17%(225/1252) | Feb 2, 2026 |
| 2095 | Beth Tableaux | 17%(37/213) | Dec 9, 2025 |
| 2096 | Collecting Bugs | 43%(6754/15576) | Mar 5, 2026 |
| 2097 | Drawing Windows | 23%(26/113) | Mar 7, 2026 |
| 2098 | Ellipse | 15%(131/862) | Mar 5, 2026 |
| 2099 | Fool's Day | 7%(42/584) | Jan 8, 2026 |
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