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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 |
| 1800 | Magic Trick | 21%(206/939) | Mar 29, 2026 |
| 1801 | Formula Racing | 22%(95/416) | Dec 9, 2025 |
| 1802 | Ancient Plates | 12%(43/333) | Mar 5, 2026 |
| 1803 | Box Art | 13%(149/1115) | Nov 21, 2025 |
| 1804 | Brainman | 48%(9231/19222) | Apr 7, 2026 |
| 1805 | Friends | 21%(175/804) | Mar 29, 2026 |
| 1806 | Manhattan 2025 | 45%(1262/2782) | Apr 7, 2026 |
| 1807 | Mayan Dates | 26%(47/175) | Mar 22, 2026 |
| 1808 | Quadratic Residues | 33%(687/2026) | Nov 20, 2025 |
| 1809 | Regetni | 38%(760/1998) | Nov 20, 2025 |
| 1810 | Covering | 16%(169/1054) | Dec 9, 2025 |
| 1811 | Prime Test | 27%(12273/45324) | Mar 29, 2026 |
| 1812 | Zuma Game | 19%(123/630) | Mar 29, 2026 |
| 1813 | Overlapped Shapes | 28%(194/682) | Mar 21, 2026 |
| 1814 | Polynomial | 6%(29/441) | Dec 9, 2025 |
| 1815 | Friendship | 27%(3563/12769) | Mar 22, 2026 |
| 1816 | Wild Words | 27%(2075/7481) | Mar 28, 2026 |
| 1817 | Traffic Jam | 45%(173/383) | Dec 9, 2025 |
| 1818 | ATP | 39%(398/1011) | Dec 1, 2025 |
| 1819 | Disks | 25%(519/2074) | Dec 9, 2025 |
| 1820 | Expression | 1%(27/2389) | Mar 5, 2026 |
| 1821 | Fence | 34%(3419/10031) | Apr 9, 2026 |
| 1822 | Fence2 | 36%(160/444) | Mar 20, 2026 |
| 1823 | Hotel | 42%(1427/3323) | Mar 29, 2026 |
| 1824 | TwoFour | 28%(79/277) | Mar 5, 2026 |
| 1825 | Young | 22%(167/736) | Mar 20, 2026 |
| 1826 | The Best Farm | 29%(658/2230) | Nov 20, 2025 |
| 1827 | A Bunch Of Monsters | 39%(444/1118) | Mar 29, 2026 |
| 1828 | Monkeys' Pride | 33%(3328/9904) | Mar 29, 2026 |
| 1829 | 火力防御网 | 21%(81/379) | Mar 21, 2026 |
| 1830 | 开关问题 | 40%(5809/14428) | Mar 19, 2026 |
| 1831 | 不定方程组 | 29%(272/917) | Feb 2, 2026 |
| 1832 | 连环锁 | 31%(471/1473) | Dec 9, 2025 |
| 1833 | 排列 | 35%(9775/27802) | Mar 21, 2026 |
| 1834 | 线段处理 | 12%(94/758) | Nov 21, 2025 |
| 1835 | 宇航员 | 40%(3760/9225) | Apr 6, 2026 |
| 1836 | Alignment | 31%(7639/23879) | Mar 29, 2026 |
| 1837 | Balance | 62%(13592/21905) | Apr 9, 2026 |
| 1838 | Banana | 36%(928/2518) | Mar 29, 2026 |
| 1839 | Cattle | 16%(60/366) | Mar 29, 2026 |
| 1840 | Eqs | 47%(9822/20719) | Apr 2, 2026 |
| 1841 | Meadow | 16%(107/653) | Mar 29, 2026 |
| 1842 | Parking | 20%(46/224) | Mar 29, 2026 |
| 1843 | Shire | 16%(25/150) | Dec 1, 2025 |
| 1844 | Sum | 65%(7534/11515) | Mar 29, 2026 |
| 1845 | Sumdiv | 23%(10557/44136) | Apr 14, 2026 |
| 1846 | System | 26%(115/437) | Mar 20, 2026 |
| 1847 | Tram | 37%(10201/27100) | Mar 31, 2026 |
| 1848 | Tree | 35%(1636/4613) | Mar 5, 2026 |
| 1849 | Two | 52%(1972/3781) | Mar 30, 2026 |
| 1850 | Code | 48%(5938/12263) | Apr 2, 2026 |
| 1851 | Map | 21%(167/793) | Jan 7, 2026 |
| 1852 | Ants | 36%(17996/49609) | Apr 5, 2026 |
| 1853 | Cat | 24%(532/2163) | Jan 8, 2026 |
| 1854 | Evil Straw Warts Live | 29%(990/3332) | Apr 2, 2026 |
| 1855 | Mint | 34%(610/1751) | Apr 2, 2026 |
| 1856 | Sea Battle | 34%(1254/3591) | Apr 2, 2026 |
| 1857 | To Europe! To Europe! | 34%(501/1458) | Apr 2, 2026 |
| 1858 | Interesting Maze Game | 26%(104/400) | Dec 9, 2025 |
| 1859 | The Perfect Symmetry | 38%(569/1488) | Dec 9, 2025 |
| 1860 | Currency Exchange | 39%(23710/60648) | Apr 2, 2026 |
| 1861 | Network | 40%(7990/19791) | Dec 5, 2025 |
| 1862 | Stripies | 42%(12694/30034) | Apr 11, 2026 |
| 1863 | Subnumber | 11%(130/1120) | Apr 7, 2026 |
| 1864 | Funny Card Game | 11%(21/182) | Dec 1, 2025 |
| 1865 | Practice | 43%(92/210) | Apr 2, 2026 |
| 1866 | Help! | 25%(117/456) | Nov 21, 2025 |
| 1867 | Treequivalence | 23%(113/474) | Dec 9, 2025 |
| 1868 | Antiarithmetic? | 49%(753/1507) | Apr 2, 2026 |
| 1869 | Test | 38%(132/346) | Mar 20, 2026 |
| 1870 | Bee Breeding | 42%(797/1886) | Jan 8, 2026 |
| 1871 | Bullet Hole | 6%(25/405) | Dec 9, 2025 |
| 1872 | A Dicey Problem | 32%(359/1108) | Dec 9, 2025 |
| 1873 | The Fortified Forest | 27%(2653/9650) | Mar 20, 2026 |
| 1874 | Trade on Verweggistan | 28%(612/2179) | Apr 2, 2026 |
| 1875 | Robot | 20%(65/318) | Dec 9, 2025 |
| 1876 | The Letter Carrier's Rounds | 29%(128/441) | Dec 9, 2025 |
| 1877 | Flooded! | 28%(2502/8805) | Jan 8, 2026 |
| 1878 | Jill's Bike | 25%(391/1538) | Dec 9, 2025 |
| 1879 | Tempus et mobilius Time and motion | 58%(553/949) | Dec 9, 2025 |
| 1880 | Variable Radix Huffman Encoding | 27%(284/1025) | Mar 5, 2026 |
| 1881 | Sail Race | 15%(20/126) | Dec 9, 2025 |
| 1882 | Stamps | 34%(600/1748) | Apr 2, 2026 |
| 1883 | Theseus and the Minotaur | 9%(29/307) | Dec 9, 2025 |
| 1884 | Train Time | 8%(45/502) | Dec 9, 2025 |
| 1885 | Uncompress | 34%(358/1052) | Apr 2, 2026 |
| 1886 | Borrowers | 23%(398/1671) | Apr 5, 2026 |
| 1887 | Testing the CATCHER | 36%(7301/19847) | Apr 2, 2026 |
| 1888 | Crossword Answers | 41%(625/1506) | Dec 9, 2025 |
| 1889 | Package Pricing | 11%(62/555) | Jan 6, 2026 |
| 1890 | Switching Channels | 50%(254/503) | Dec 1, 2025 |
| 1891 | Typesetting | 11%(41/360) | Dec 9, 2025 |
| 1892 | VTAS - Vessel Traffic Advisory Service | 1%(4/338) | Dec 9, 2025 |
| 1893 | Monitoring Wheelchair Patients | 17%(81/467) | Dec 9, 2025 |
| 1894 | Alternative Scale of Notation | 37%(842/2255) | Jan 7, 2026 |
| 1895 | Bring Them There | 27%(301/1096) | Dec 9, 2025 |
| 1896 | Code Formatting | 34%(555/1618) | Mar 22, 2026 |
| 1897 | Data Mining | 25%(120/470) | Jan 8, 2026 |
| 1898 | Entropy | 21%(221/1009) | Mar 27, 2026 |
| 1899 | Farmer Bill's Problem | 26%(684/2604) | Dec 9, 2025 |
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