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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 | 22%(210/944) | Oct 10, 2026 |
| 1801 | Formula Racing | 23%(98/425) | Oct 16, 2026 |
| 1802 | Ancient Plates | 14%(48/338) | Oct 16, 2026 |
| 1803 | Box Art | 13%(155/1121) | Oct 16, 2026 |
| 1804 | Brainman | 48%(9243/19235) | Oct 9, 2026 |
| 1805 | Friends | 22%(178/807) | Oct 15, 2026 |
| 1806 | Manhattan 2025 | 45%(1275/2798) | Oct 9, 2026 |
| 1807 | Mayan Dates | 27%(50/181) | Oct 16, 2026 |
| 1808 | Quadratic Residues | 34%(697/2044) | Oct 9, 2026 |
| 1809 | Regetni | 38%(763/2001) | Oct 9, 2026 |
| 1810 | Covering | 16%(172/1058) | Oct 16, 2026 |
| 1811 | Prime Test | 27%(12493/45617) | Oct 9, 2026 |
| 1812 | Zuma Game | 19%(126/634) | Oct 16, 2026 |
| 1813 | Overlapped Shapes | 29%(200/688) | Oct 9, 2026 |
| 1814 | Polynomial | 6%(31/445) | Oct 16, 2026 |
| 1815 | Friendship | 27%(3575/12786) | Oct 9, 2026 |
| 1816 | Wild Words | 27%(2080/7489) | Oct 9, 2026 |
| 1817 | Traffic Jam | 45%(176/386) | Oct 16, 2026 |
| 1818 | ATP | 39%(403/1031) | Oct 9, 2026 |
| 1819 | Disks | 25%(523/2078) | Oct 9, 2026 |
| 1820 | Expression | 1%(32/2402) | Oct 20, 2026 |
| 1821 | Fence | 34%(3488/10187) | Oct 9, 2026 |
| 1822 | Fence2 | 36%(165/449) | Oct 16, 2026 |
| 1823 | Hotel | 43%(1435/3331) | Oct 9, 2026 |
| 1824 | TwoFour | 30%(86/284) | Oct 16, 2026 |
| 1825 | Young | 23%(171/740) | Oct 16, 2026 |
| 1826 | The Best Farm | 29%(665/2237) | Oct 9, 2026 |
| 1827 | A Bunch Of Monsters | 39%(447/1121) | Oct 9, 2026 |
| 1828 | Monkeys' Pride | 33%(3330/9906) | Oct 9, 2026 |
| 1829 | 火力防御网 | 22%(88/390) | Oct 16, 2026 |
| 1830 | 开关问题 | 40%(5841/14469) | Oct 9, 2026 |
| 1831 | 不定方程组 | 29%(274/925) | Oct 16, 2026 |
| 1832 | 连环锁 | 32%(477/1485) | Oct 9, 2026 |
| 1833 | 排列 | 35%(9781/27808) | Oct 9, 2026 |
| 1834 | 线段处理 | 12%(100/773) | Oct 16, 2026 |
| 1835 | 宇航员 | 40%(3764/9229) | Oct 9, 2026 |
| 1836 | Alignment | 31%(7656/23948) | Oct 18, 2026 |
| 1837 | Balance | 62%(13601/21922) | Oct 17, 2026 |
| 1838 | Banana | 37%(934/2524) | Oct 9, 2026 |
| 1839 | Cattle | 17%(65/378) | Oct 16, 2026 |
| 1840 | Eqs | 47%(9830/20727) | Oct 21, 2026 |
| 1841 | Meadow | 17%(113/659) | Oct 16, 2026 |
| 1842 | Parking | 21%(48/226) | Oct 16, 2026 |
| 1843 | Shire | 18%(30/163) | Oct 16, 2026 |
| 1844 | Sum | 65%(7536/11517) | Oct 9, 2026 |
| 1845 | Sumdiv | 23%(10594/44233) | Oct 19, 2026 |
| 1846 | System | 26%(119/441) | Oct 16, 2026 |
| 1847 | Tram | 37%(10224/27135) | Oct 21, 2026 |
| 1848 | Tree | 35%(1641/4620) | Oct 9, 2026 |
| 1849 | Two | 52%(1980/3795) | Oct 9, 2026 |
| 1850 | Code | 48%(5961/12299) | Oct 9, 2026 |
| 1851 | Map | 20%(177/850) | Oct 16, 2026 |
| 1852 | Ants | 36%(18330/50025) | Oct 20, 2026 |
| 1853 | Cat | 24%(533/2175) | Oct 16, 2026 |
| 1854 | Evil Straw Warts Live | 29%(1006/3360) | Oct 19, 2026 |
| 1855 | Mint | 34%(613/1754) | Oct 9, 2026 |
| 1856 | Sea Battle | 34%(1256/3594) | Oct 9, 2026 |
| 1857 | To Europe! To Europe! | 34%(511/1470) | Oct 20, 2026 |
| 1858 | Interesting Maze Game | 26%(107/403) | Oct 16, 2026 |
| 1859 | The Perfect Symmetry | 38%(572/1491) | Oct 9, 2026 |
| 1860 | Currency Exchange | 39%(23916/60953) | Oct 21, 2026 |
| 1861 | Network | 40%(7990/19829) | Oct 9, 2026 |
| 1862 | Stripies | 42%(12841/30224) | Oct 17, 2026 |
| 1863 | Subnumber | 11%(136/1136) | Oct 16, 2026 |
| 1864 | Funny Card Game | 10%(21/192) | Oct 16, 2026 |
| 1865 | Practice | 45%(98/216) | Oct 16, 2026 |
| 1866 | Help! | 25%(117/468) | Oct 16, 2026 |
| 1867 | Treequivalence | 24%(116/478) | Oct 16, 2026 |
| 1868 | Antiarithmetic? | 50%(756/1511) | Oct 9, 2026 |
| 1869 | Test | 39%(138/352) | Oct 16, 2026 |
| 1870 | Bee Breeding | 42%(801/1895) | Oct 9, 2026 |
| 1871 | Bullet Hole | 6%(27/410) | Oct 16, 2026 |
| 1872 | A Dicey Problem | 32%(362/1114) | Oct 9, 2026 |
| 1873 | The Fortified Forest | 27%(2663/9660) | Oct 9, 2026 |
| 1874 | Trade on Verweggistan | 28%(618/2187) | Oct 9, 2026 |
| 1875 | Robot | 19%(67/341) | Oct 16, 2026 |
| 1876 | The Letter Carrier's Rounds | 28%(130/452) | Oct 16, 2026 |
| 1877 | Flooded! | 28%(2504/8807) | Oct 9, 2026 |
| 1878 | Jill's Bike | 25%(391/1551) | Oct 16, 2026 |
| 1879 | Tempus et mobilius Time and motion | 57%(556/965) | Oct 9, 2026 |
| 1880 | Variable Radix Huffman Encoding | 27%(285/1035) | Oct 9, 2026 |
| 1881 | Sail Race | 9%(20/207) | Oct 16, 2026 |
| 1882 | Stamps | 34%(603/1751) | Oct 9, 2026 |
| 1883 | Theseus and the Minotaur | 9%(31/319) | Oct 16, 2026 |
| 1884 | Train Time | 9%(47/516) | Oct 16, 2026 |
| 1885 | Uncompress | 34%(361/1056) | Oct 9, 2026 |
| 1886 | Borrowers | 23%(401/1674) | Oct 9, 2026 |
| 1887 | Testing the CATCHER | 36%(7308/19856) | Oct 9, 2026 |
| 1888 | Crossword Answers | 41%(627/1521) | Oct 9, 2026 |
| 1889 | Package Pricing | 11%(68/597) | Oct 16, 2026 |
| 1890 | Switching Channels | 50%(257/506) | Oct 16, 2026 |
| 1891 | Typesetting | 12%(45/365) | Oct 16, 2026 |
| 1892 | VTAS - Vessel Traffic Advisory Service | 1%(4/353) | Oct 16, 2026 |
| 1893 | Monitoring Wheelchair Patients | 16%(81/492) | Oct 16, 2026 |
| 1894 | Alternative Scale of Notation | 37%(851/2264) | Oct 10, 2026 |
| 1895 | Bring Them There | 26%(302/1130) | Oct 16, 2026 |
| 1896 | Code Formatting | 34%(561/1626) | Oct 9, 2026 |
| 1897 | Data Mining | 27%(130/481) | Oct 17, 2026 |
| 1898 | Entropy | 21%(222/1039) | Oct 16, 2026 |
| 1899 | Farmer Bill's Problem | 26%(690/2610) | Oct 9, 2026 |
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