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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%(204/930) | Aug 19, 2025 |
| 1801 | Formula Racing | 23%(95/413) | May 19, 2025 |
| 1802 | Ancient Plates | 13%(43/329) | Feb 8, 2023 |
| 1803 | Box Art | 13%(145/1110) | Sep 25, 2024 |
| 1804 | Brainman | 47%(8972/18919) | Aug 13, 2025 |
| 1805 | Friends | 21%(171/799) | May 22, 2025 |
| 1806 | Manhattan 2025 | 45%(1250/2764) | Apr 29, 2025 |
| 1807 | Mayan Dates | 27%(46/169) | Jun 20, 2022 |
| 1808 | Quadratic Residues | 33%(683/2022) | Aug 14, 2025 |
| 1809 | Regetni | 37%(758/1996) | May 18, 2025 |
| 1810 | Covering | 16%(169/1049) | Oct 17, 2022 |
| 1811 | Prime Test | 27%(12233/45209) | Aug 19, 2025 |
| 1812 | Zuma Game | 19%(122/614) | May 18, 2025 |
| 1813 | Overlapped Shapes | 28%(189/672) | May 18, 2025 |
| 1814 | Polynomial | 6%(29/439) | Jul 31, 2024 |
| 1815 | Friendship | 27%(3559/12751) | May 18, 2025 |
| 1816 | Wild Words | 27%(2072/7465) | Sep 26, 2024 |
| 1817 | Traffic Jam | 46%(173/376) | May 25, 2025 |
| 1818 | ATP | 39%(398/1009) | May 18, 2025 |
| 1819 | Disks | 25%(518/2072) | May 25, 2025 |
| 1820 | Expression | 1%(27/2386) | Aug 15, 2021 |
| 1821 | Fence | 34%(3384/9927) | Aug 21, 2025 |
| 1822 | Fence2 | 35%(155/431) | Jun 20, 2025 |
| 1823 | Hotel | 42%(1416/3307) | Aug 13, 2025 |
| 1824 | TwoFour | 28%(79/273) | Jul 24, 2024 |
| 1825 | Young | 22%(165/727) | Nov 5, 2024 |
| 1826 | The Best Farm | 29%(655/2226) | Aug 16, 2024 |
| 1827 | A Bunch Of Monsters | 39%(436/1102) | Aug 13, 2025 |
| 1828 | Monkeys' Pride | 33%(3318/9887) | Apr 30, 2025 |
| 1829 | 火力防御网 | 21%(81/373) | Mar 31, 2025 |
| 1830 | 开关问题 | 40%(5798/14397) | Aug 21, 2025 |
| 1831 | 不定方程组 | 29%(270/906) | May 2, 2025 |
| 1832 | 连环锁 | 31%(470/1469) | Nov 5, 2024 |
| 1833 | 排列 | 35%(9772/27770) | Aug 13, 2025 |
| 1834 | 线段处理 | 12%(93/756) | Dec 4, 2024 |
| 1835 | 宇航员 | 40%(3754/9213) | Aug 13, 2025 |
| 1836 | Alignment | 31%(7631/23848) | Jun 23, 2025 |
| 1837 | Balance | 61%(13375/21596) | Aug 14, 2025 |
| 1838 | Banana | 36%(919/2500) | Aug 14, 2025 |
| 1839 | Cattle | 16%(57/349) | Dec 29, 2024 |
| 1840 | Eqs | 47%(9814/20707) | Aug 13, 2025 |
| 1841 | Meadow | 16%(104/638) | May 22, 2025 |
| 1842 | Parking | 21%(46/214) | Aug 27, 2021 |
| 1843 | Shire | 17%(25/144) | Oct 18, 2021 |
| 1844 | Sum | 65%(7517/11497) | Aug 14, 2025 |
| 1845 | Sumdiv | 23%(10530/44036) | Aug 21, 2025 |
| 1846 | System | 26%(114/428) | Jul 21, 2024 |
| 1847 | Tram | 37%(10176/27044) | Aug 17, 2025 |
| 1848 | Tree | 35%(1636/4608) | Aug 13, 2025 |
| 1849 | Two | 52%(1923/3630) | Aug 17, 2025 |
| 1850 | Code | 48%(5915/12227) | Aug 21, 2025 |
| 1851 | Map | 20%(163/781) | May 22, 2025 |
| 1852 | Ants | 35%(17297/48392) | Aug 24, 2025 |
| 1853 | Cat | 24%(531/2154) | May 23, 2025 |
| 1854 | Evil Straw Warts Live | 29%(975/3299) | Aug 14, 2025 |
| 1855 | Mint | 34%(604/1731) | May 22, 2025 |
| 1856 | Sea Battle | 34%(1248/3578) | May 22, 2025 |
| 1857 | To Europe! To Europe! | 34%(488/1411) | Jul 28, 2025 |
| 1858 | Interesting Maze Game | 26%(104/398) | Sep 28, 2024 |
| 1859 | The Perfect Symmetry | 38%(569/1485) | Jul 13, 2024 |
| 1860 | Currency Exchange | 39%(23457/60141) | Aug 17, 2025 |
| 1861 | Network | 40%(7983/19777) | Aug 10, 2025 |
| 1862 | Stripies | 42%(12584/29775) | Aug 13, 2025 |
| 1863 | Subnumber | 11%(130/1109) | Dec 12, 2024 |
| 1864 | Funny Card Game | 11%(21/176) | Jul 14, 2021 |
| 1865 | Practice | 44%(87/195) | Jun 4, 2021 |
| 1866 | Help! | 25%(114/450) | Nov 6, 2024 |
| 1867 | Treequivalence | 23%(112/470) | May 23, 2024 |
| 1868 | Antiarithmetic? | 49%(743/1493) | Jan 19, 2025 |
| 1869 | Test | 38%(131/336) | Jul 25, 2024 |
| 1870 | Bee Breeding | 42%(797/1882) | May 4, 2025 |
| 1871 | Bullet Hole | 6%(25/403) | Aug 27, 2021 |
| 1872 | A Dicey Problem | 32%(357/1102) | Oct 25, 2024 |
| 1873 | The Fortified Forest | 27%(2645/9582) | Aug 17, 2025 |
| 1874 | Trade on Verweggistan | 27%(606/2168) | Dec 12, 2023 |
| 1875 | Robot | 20%(65/316) | Feb 12, 2023 |
| 1876 | The Letter Carrier's Rounds | 29%(128/438) | Oct 24, 2023 |
| 1877 | Flooded! | 28%(2501/8795) | Aug 13, 2025 |
| 1878 | Jill's Bike | 25%(390/1533) | Aug 14, 2025 |
| 1879 | Tempus et mobilius Time and motion | 58%(551/944) | Apr 30, 2025 |
| 1880 | Variable Radix Huffman Encoding | 27%(281/1014) | Nov 13, 2024 |
| 1881 | Sail Race | 16%(20/124) | Jun 26, 2025 |
| 1882 | Stamps | 34%(589/1728) | Jun 9, 2023 |
| 1883 | Theseus and the Minotaur | 9%(29/304) | Sep 23, 2024 |
| 1884 | Train Time | 9%(45/500) | Jun 25, 2025 |
| 1885 | Uncompress | 34%(358/1038) | Sep 24, 2024 |
| 1886 | Borrowers | 23%(395/1667) | Nov 2, 2024 |
| 1887 | Testing the CATCHER | 36%(7294/19828) | Jul 22, 2025 |
| 1888 | Crossword Answers | 41%(625/1503) | Dec 14, 2024 |
| 1889 | Package Pricing | 11%(62/548) | Aug 27, 2021 |
| 1890 | Switching Channels | 51%(254/498) | Aug 1, 2025 |
| 1891 | Typesetting | 11%(41/357) | Jun 22, 2025 |
| 1892 | VTAS - Vessel Traffic Advisory Service | 1%(4/336) | May 8, 2025 |
| 1893 | Monitoring Wheelchair Patients | 17%(81/465) | Jun 23, 2025 |
| 1894 | Alternative Scale of Notation | 37%(839/2250) | May 8, 2025 |
| 1895 | Bring Them There | 27%(300/1090) | May 8, 2025 |
| 1896 | Code Formatting | 34%(553/1610) | May 16, 2025 |
| 1897 | Data Mining | 25%(117/463) | Mar 31, 2025 |
| 1898 | Entropy | 21%(221/1005) | May 22, 2025 |
| 1899 | Farmer Bill's Problem | 26%(682/2597) | May 12, 2025 |
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