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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 |
| 1800 | Magic Trick | 21%(204/929) | 2023-4-3 |
| 1801 | Formula Racing | 22%(93/408) | 2024-11-28 |
| 1802 | Ancient Plates | 13%(43/329) | 2023-2-8 |
| 1803 | Box Art | 13%(145/1110) | 2024-9-25 |
| 1804 | Brainman | 47%(8947/18868) | 2025-5-14 |
| 1805 | Friends | 21%(169/769) | 2025-5-12 |
| 1806 | Manhattan 2025 | 45%(1250/2764) | 2025-4-29 |
| 1807 | Mayan Dates | 27%(46/169) | 2022-6-20 |
| 1808 | Quadratic Residues | 33%(682/2019) | 2025-4-30 |
| 1809 | Regetni | 38%(758/1978) | 2025-5-10 |
| 1810 | Covering | 16%(169/1049) | 2022-10-17 |
| 1811 | Prime Test | 27%(12136/44937) | 2025-5-15 |
| 1812 | Zuma Game | 19%(122/611) | 2024-7-22 |
| 1813 | Overlapped Shapes | 28%(188/671) | 2024-8-12 |
| 1814 | Polynomial | 6%(29/439) | 2024-7-31 |
| 1815 | Friendship | 27%(3558/12747) | 2025-3-14 |
| 1816 | Wild Words | 27%(2072/7465) | 2024-9-26 |
| 1817 | Traffic Jam | 46%(173/375) | 2024-5-6 |
| 1818 | ATP | 39%(398/1007) | 2025-4-29 |
| 1819 | Disks | 24%(517/2070) | 2025-2-25 |
| 1820 | Expression | 1%(27/2386) | 2021-8-15 |
| 1821 | Fence | 34%(3343/9831) | 2025-4-29 |
| 1822 | Fence2 | 36%(155/429) | 2024-7-17 |
| 1823 | Hotel | 42%(1414/3305) | 2024-10-19 |
| 1824 | TwoFour | 28%(79/273) | 2024-7-24 |
| 1825 | Young | 22%(165/727) | 2024-11-5 |
| 1826 | The Best Farm | 29%(655/2226) | 2024-8-16 |
| 1827 | A Bunch Of Monsters | 39%(434/1100) | 2024-12-22 |
| 1828 | Monkeys' Pride | 33%(3318/9887) | 2025-4-30 |
| 1829 | 火力防御网 | 21%(81/373) | 2025-3-31 |
| 1830 | 开关问题 | 40%(5782/14354) | 2025-4-20 |
| 1831 | 不定方程组 | 29%(270/906) | 2025-5-2 |
| 1832 | 连环锁 | 31%(470/1469) | 2024-11-5 |
| 1833 | 排列 | 35%(9769/27762) | 2025-5-13 |
| 1834 | 线段处理 | 12%(93/756) | 2024-12-4 |
| 1835 | 宇航员 | 40%(3753/9210) | 2024-10-31 |
| 1836 | Alignment | 31%(7630/23847) | 2025-4-19 |
| 1837 | Balance | 62%(13340/21512) | 2025-5-12 |
| 1838 | Banana | 36%(918/2499) | 2024-8-13 |
| 1839 | Cattle | 16%(57/349) | 2024-12-29 |
| 1840 | Eqs | 47%(9809/20693) | 2025-5-3 |
| 1841 | Meadow | 16%(104/637) | 2024-12-27 |
| 1842 | Parking | 21%(46/214) | 2021-8-27 |
| 1843 | Shire | 17%(25/144) | 2021-10-18 |
| 1844 | Sum | 65%(7514/11493) | 2025-3-18 |
| 1845 | Sumdiv | 23%(10509/43923) | 2025-5-11 |
| 1846 | System | 26%(114/428) | 2024-7-21 |
| 1847 | Tram | 37%(10172/27040) | 2025-5-13 |
| 1848 | Tree | 35%(1635/4607) | 2025-5-5 |
| 1849 | Two | 52%(1903/3601) | 2025-2-28 |
| 1850 | Code | 48%(5911/12216) | 2025-3-7 |
| 1851 | Map | 20%(163/778) | 2025-5-5 |
| 1852 | Ants | 35%(17283/48339) | 2025-5-9 |
| 1853 | Cat | 24%(530/2124) | 2025-3-19 |
| 1854 | Evil Straw Warts Live | 29%(968/3276) | 2025-3-15 |
| 1855 | Mint | 34%(603/1728) | 2021-8-27 |
| 1856 | Sea Battle | 34%(1247/3577) | 2024-4-30 |
| 1857 | To Europe! To Europe! | 33%(457/1356) | 2025-5-15 |
| 1858 | Interesting Maze Game | 26%(104/398) | 2024-9-28 |
| 1859 | The Perfect Symmetry | 38%(569/1485) | 2024-7-13 |
| 1860 | Currency Exchange | 39%(23398/59963) | 2025-5-13 |
| 1861 | Network | 40%(7978/19765) | 2024-8-16 |
| 1862 | Stripies | 42%(12578/29760) | 2025-5-12 |
| 1863 | Subnumber | 11%(130/1109) | 2024-12-12 |
| 1864 | Funny Card Game | 11%(21/176) | 2021-7-14 |
| 1865 | Practice | 44%(87/195) | 2021-6-4 |
| 1866 | Help! | 25%(114/450) | 2024-11-6 |
| 1867 | Treequivalence | 23%(112/470) | 2024-5-23 |
| 1868 | Antiarithmetic? | 49%(743/1493) | 2025-1-19 |
| 1869 | Test | 38%(131/336) | 2024-7-25 |
| 1870 | Bee Breeding | 42%(797/1882) | 2025-5-4 |
| 1871 | Bullet Hole | 6%(25/403) | 2021-8-27 |
| 1872 | A Dicey Problem | 32%(357/1102) | 2024-10-25 |
| 1873 | The Fortified Forest | 27%(2645/9581) | 2025-3-14 |
| 1874 | Trade on Verweggistan | 27%(606/2168) | 2023-12-12 |
| 1875 | Robot | 20%(65/316) | 2023-2-12 |
| 1876 | The Letter Carrier's Rounds | 29%(128/438) | 2023-10-24 |
| 1877 | Flooded! | 28%(2500/8792) | 2024-7-28 |
| 1878 | Jill's Bike | 25%(389/1532) | 2024-11-14 |
| 1879 | Tempus et mobilius Time and motion | 58%(551/944) | 2025-4-30 |
| 1880 | Variable Radix Huffman Encoding | 27%(281/1014) | 2024-11-13 |
| 1881 | Sail Race | 18%(20/107) | 2021-8-27 |
| 1882 | Stamps | 34%(589/1728) | 2023-6-9 |
| 1883 | Theseus and the Minotaur | 9%(29/304) | 2024-9-23 |
| 1884 | Train Time | 8%(42/492) | 2024-10-27 |
| 1885 | Uncompress | 34%(358/1038) | 2024-9-24 |
| 1886 | Borrowers | 23%(395/1667) | 2024-11-2 |
| 1887 | Testing the CATCHER | 36%(7293/19826) | 2025-5-14 |
| 1888 | Crossword Answers | 41%(625/1503) | 2024-12-14 |
| 1889 | Package Pricing | 11%(62/548) | 2021-8-27 |
| 1890 | Switching Channels | 51%(254/495) | 2022-12-9 |
| 1891 | Typesetting | 11%(39/354) | 2025-5-8 |
| 1892 | VTAS - Vessel Traffic Advisory Service | 1%(4/336) | 2025-5-8 |
| 1893 | Monitoring Wheelchair Patients | 17%(79/458) | 2025-5-8 |
| 1894 | Alternative Scale of Notation | 37%(839/2250) | 2025-5-8 |
| 1895 | Bring Them There | 27%(300/1090) | 2025-5-8 |
| 1896 | Code Formatting | 34%(553/1609) | 2025-5-12 |
| 1897 | Data Mining | 25%(117/463) | 2025-3-31 |
| 1898 | Entropy | 22%(221/1004) | 2024-7-22 |
| 1899 | Farmer Bill's Problem | 26%(682/2597) | 2025-5-12 |
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