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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 |
| 1800 | Magic Trick | 21%(190/872) | 2017-12-25 |
| 1801 | Formula Racing | 26%(76/287) | 2018-1-21 |
| 1802 | Ancient Plates | 14%(40/285) | 2017-12-25 |
| 1803 | Box Art | 13%(138/1045) | 2018-1-17 |
| 1804 | Brainman | 50%(6022/11856) | 2018-4-18 |
| 1805 | Friends | 23%(163/698) | 2018-1-14 |
| 1806 | Manhattan 2025 | 46%(1130/2452) | 2018-4-13 |
| 1807 | Mayan Dates | 30%(44/145) | 2017-12-25 |
| 1808 | Quadratic Residues | 33%(570/1695) | 2018-4-5 |
| 1809 | Regetni | 37%(715/1897) | 2018-3-19 |
| 1810 | Covering | 16%(166/1015) | 2017-12-25 |
| 1811 | Prime Test | 26%(9981/37230) | 2018-4-17 |
| 1812 | Zuma Game | 20%(114/555) | 2018-1-7 |
| 1813 | Overlapped Shapes | 28%(176/617) | 2018-3-28 |
| 1814 | Polynomial | 6%(26/387) | 2017-12-25 |
| 1815 | Friendship | 27%(3107/11154) | 2018-4-20 |
| 1816 | Wild Words | 26%(1493/5610) | 2018-3-26 |
| 1817 | Traffic Jam | 47%(142/297) | 2018-3-5 |
| 1818 | ATP | 39%(357/901) | 2018-1-1 |
| 1819 | Disks | 24%(419/1712) | 2018-3-7 |
| 1820 | Expression | 0%(22/2327) | 2017-12-25 |
| 1821 | Fence | 32%(1743/5442) | 2018-4-20 |
| 1822 | Fence2 | 40%(138/337) | 2017-12-25 |
| 1823 | Hotel | 43%(1263/2892) | 2018-4-21 |
| 1824 | TwoFour | 33%(77/231) | 2017-12-25 |
| 1825 | Young | 27%(142/513) | 2018-4-10 |
| 1826 | The Best Farm | 29%(633/2111) | 2018-4-11 |
| 1827 | A Bunch Of Monsters | 38%(392/1016) | 2018-1-1 |
| 1828 | Monkeys' Pride | 33%(3072/9213) | 2018-3-1 |
| 1829 | 火力防御网 | 26%(64/246) | 2018-3-30 |
| 1830 | 开关问题 | 40%(3969/9877) | 2018-4-21 |
| 1831 | 不定方程组 | 30%(247/811) | 2018-2-24 |
| 1832 | 连环锁 | 32%(434/1335) | 2018-3-30 |
| 1833 | 排列 | 37%(8019/21154) | 2018-4-17 |
| 1834 | 线段处理 | 12%(90/724) | 2018-3-27 |
| 1835 | 宇航员 | 42%(2938/6895) | 2018-4-19 |
| 1836 | Alignment | 32%(5956/18161) | 2018-4-20 |
| 1837 | Balance | 63%(10003/15869) | 2018-4-21 |
| 1838 | Banana | 36%(880/2403) | 2018-3-7 |
| 1839 | Cattle | 15%(48/301) | 2017-12-25 |
| 1840 | Eqs | 49%(8554/17421) | 2018-4-21 |
| 1841 | Meadow | 17%(98/564) | 2017-12-25 |
| 1842 | Parking | 22%(40/180) | 2017-12-25 |
| 1843 | Shire | 15%(20/133) | 2017-12-25 |
| 1844 | Sum | 65%(7215/11010) | 2018-4-20 |
| 1845 | Sumdiv | 24%(6252/25241) | 2018-4-21 |
| 1846 | System | 28%(107/374) | 2018-1-1 |
| 1847 | Tram | 37%(6625/17740) | 2018-4-21 |
| 1848 | Tree | 35%(1391/3955) | 2018-4-21 |
| 1849 | Two | 53%(995/1844) | 2018-3-20 |
| 1850 | Code | 48%(4913/10219) | 2018-4-21 |
| 1851 | Map | 21%(155/717) | 2017-12-25 |
| 1852 | Ants | 40%(9162/22573) | 2018-4-21 |
| 1853 | Cat | 25%(496/1948) | 2018-1-4 |
| 1854 | Evil Straw Warts Live | 28%(328/1140) | 2018-4-8 |
| 1855 | Mint | 34%(586/1684) | 2017-12-25 |
| 1856 | Sea Battle | 35%(1158/3261) | 2018-3-7 |
| 1857 | To Europe! To Europe! | 33%(345/1033) | 2018-4-14 |
| 1858 | Interesting Maze Game | 27%(99/356) | 2018-3-11 |
| 1859 | The Perfect Symmetry | 38%(537/1390) | 2017-12-30 |
| 1860 | Currency Exchange | 38%(13241/34524) | 2018-4-21 |
| 1861 | Network | 40%(7159/17763) | 2018-4-15 |
| 1862 | Stripies | 44%(8634/19330) | 2018-4-20 |
| 1863 | Subnumber | 11%(114/1013) | 2018-4-5 |
| 1864 | Funny Card Game | 12%(18/145) | 2017-11-11 |
| 1865 | Practice | 53%(82/153) | 2017-11-11 |
| 1866 | Help! | 27%(101/365) | 2018-3-11 |
| 1867 | Treequivalence | 27%(104/385) | 2017-12-25 |
| 1868 | Antiarithmetic? | 50%(718/1429) | 2018-3-11 |
| 1869 | Test | 45%(126/276) | 2018-2-25 |
| 1870 | Bee Breeding | 41%(752/1791) | 2018-2-3 |
| 1871 | Bullet Hole | 6%(22/361) | 2017-12-25 |
| 1872 | A Dicey Problem | 32%(333/1017) | 2018-4-17 |
| 1873 | The Fortified Forest | 27%(1962/7054) | 2018-4-18 |
| 1874 | Trade on Verweggistan | 28%(544/1905) | 2018-3-27 |
| 1875 | Robot | 25%(61/243) | 2017-12-25 |
| 1876 | The Letter Carrier's Rounds | 31%(113/364) | 2018-2-24 |
| 1877 | Flooded! | 29%(1976/6736) | 2018-4-18 |
| 1878 | Jill's Bike | 25%(362/1417) | 2017-12-25 |
| 1879 | Tempus et mobilius Time and motion | 59%(511/864) | 2017-12-25 |
| 1880 | Variable Radix Huffman Encoding | 28%(257/912) | 2017-12-25 |
| 1881 | Sail Race | 21%(19/89) | 2017-12-25 |
| 1882 | Stamps | 34%(557/1632) | 2018-4-19 |
| 1883 | Theseus and the Minotaur | 11%(28/234) | 2017-12-25 |
| 1884 | Train Time | 9%(40/439) | 2017-12-25 |
| 1885 | Uncompress | 34%(329/958) | 2018-1-31 |
| 1886 | Borrowers | 23%(368/1536) | 2018-4-2 |
| 1887 | Testing the CATCHER | 36%(6874/18743) | 2018-4-20 |
| 1888 | Crossword Answers | 42%(576/1362) | 2018-4-5 |
| 1889 | Package Pricing | 10%(53/489) | 2017-12-25 |
| 1890 | Switching Channels | 53%(241/454) | 2018-2-11 |
| 1891 | Typesetting | 11%(35/311) | 2017-12-25 |
| 1892 | VTAS - Vessel Traffic Advisory Service | 1%(3/175) | 2017-12-25 |
| 1893 | Monitoring Wheelchair Patients | 18%(78/432) | 2018-3-15 |
| 1894 | Alternative Scale of Notation | 37%(811/2186) | 2018-4-21 |
| 1895 | Bring Them There | 26%(216/830) | 2017-12-30 |
| 1896 | Code Formatting | 34%(532/1529) | 2017-12-25 |
| 1897 | Data Mining | 27%(105/381) | 2018-2-25 |
| 1898 | Entropy | 22%(215/939) | 2017-12-25 |
| 1899 | Farmer Bill's Problem | 26%(649/2491) | 2017-12-25 |
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