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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 |
| 1900 | Game | 28%(287/991) | Jan 8, 2026 |
| 1901 | Hypertransmission | 22%(454/2033) | Jan 8, 2026 |
| 1902 | Illumination | 17%(61/341) | Dec 9, 2025 |
| 1903 | Jurassic Remains | 33%(783/2310) | Jan 17, 2026 |
| 1904 | King's Quest | 36%(4302/11777) | Apr 12, 2026 |
| 1905 | Expanding Rods | 26%(6303/23381) | Apr 14, 2026 |
| 1906 | Three powers | 45%(2089/4592) | Mar 5, 2026 |
| 1907 | Work Reduction | 35%(638/1802) | Apr 2, 2026 |
| 1908 | Grid Speed | 11%(43/388) | Dec 9, 2025 |
| 1909 | Marbles on a tree | 46%(905/1944) | Apr 2, 2026 |
| 1910 | Adam's Genes | 11%(34/288) | Mar 20, 2026 |
| 1911 | A Well-Formed Problem | 18%(90/487) | Dec 9, 2025 |
| 1912 | A highway and the seven dwarfs | 19%(738/3693) | Apr 2, 2026 |
| 1913 | Cocktails | 16%(102/606) | Mar 5, 2026 |
| 1914 | Cramer's Rule | 24%(793/3276) | Nov 20, 2025 |
| 1915 | Knight Moves | 45%(18056/39621) | Apr 9, 2026 |
| 1916 | Rat Attack | 32%(370/1126) | Nov 21, 2025 |
| 1917 | Automatic Poetry | 48%(1252/2598) | Apr 10, 2026 |
| 1918 | Ranking List | 29%(528/1798) | Apr 2, 2026 |
| 1919 | Ship Journey | 13%(59/427) | Apr 2, 2026 |
| 1920 | Towers of Hanoi | 44%(1247/2805) | Dec 9, 2025 |
| 1921 | Paper Cut | 19%(78/394) | Jan 13, 2026 |
| 1922 | Ride to School | 39%(10581/26647) | Apr 7, 2026 |
| 1923 | Fourier's Lines | 33%(945/2853) | Dec 9, 2025 |
| 1924 | The Treasure | 20%(492/2455) | Dec 9, 2025 |
| 1925 | Spiderman | 20%(1642/7989) | Feb 4, 2026 |
| 1926 | Pollution | 27%(1148/4246) | Nov 21, 2025 |
| 1927 | Area in Triangle | 44%(991/2225) | Jan 14, 2026 |
| 1928 | The Peanuts | 40%(3486/8503) | Dec 9, 2025 |
| 1929 | Calories from Fat | 51%(652/1263) | Apr 5, 2026 |
| 1930 | Dead Fraction | 35%(2129/5953) | Apr 2, 2026 |
| 1931 | Biometrics | 41%(457/1102) | Apr 2, 2026 |
| 1932 | XYZZY | 28%(1345/4767) | Apr 2, 2026 |
| 1933 | A Brief Gerrymander | 33%(107/322) | Jan 7, 2026 |
| 1934 | Trip | 26%(2319/8897) | Apr 2, 2026 |
| 1935 | Journey | 38%(967/2496) | Apr 2, 2026 |
| 1936 | All in All | 41%(17397/42160) | Mar 25, 2026 |
| 1937 | Balanced Food | 21%(85/399) | Dec 9, 2025 |
| 1938 | California Jones and the Gate to Freedom | 38%(318/823) | Nov 20, 2025 |
| 1939 | Diplomatic License | 39%(2862/7288) | Dec 21, 2025 |
| 1940 | Polygon Programming with Ease | 61%(879/1429) | Nov 20, 2025 |
| 1941 | The Sierpinski Fractal | 40%(2639/6449) | Apr 2, 2026 |
| 1942 | Paths on a Grid | 27%(9702/35287) | Apr 14, 2026 |
| 1943 | Hall of Fountains | 34%(317/907) | Apr 5, 2026 |
| 1944 | Fiber Communications | 30%(1550/5131) | Apr 2, 2026 |
| 1945 | Power Hungry Cows | 24%(1771/7348) | Apr 2, 2026 |
| 1946 | Cow Cycling | 54%(1790/3272) | Apr 2, 2026 |
| 1947 | Rebuilding Roads | 45%(7246/15835) | Apr 8, 2026 |
| 1948 | Triangular Pastures | 33%(3435/10393) | Apr 2, 2026 |
| 1949 | Chores | 46%(3604/7678) | Apr 2, 2026 |
| 1950 | Dessert | 36%(2453/6767) | Apr 2, 2026 |
| 1951 | Extra Krunch | 25%(1976/7803) | Apr 2, 2026 |
| 1952 | BUY LOW, BUY LOWER | 35%(4524/12677) | Apr 2, 2026 |
| 1953 | World Cup Noise | 43%(11998/27681) | Apr 13, 2026 |
| 1954 | Warez Test | 11%(39/348) | Mar 20, 2026 |
| 1955 | Rubik's Cube | 45%(381/845) | Mar 22, 2026 |
| 1956 | Pumps and Pipes | 20%(51/246) | Dec 9, 2025 |
| 1957 | Beehives | 28%(147/510) | Dec 1, 2025 |
| 1958 | Strange Towers of Hanoi | 57%(3549/6216) | Feb 4, 2026 |
| 1959 | Darts | 57%(908/1572) | Nov 21, 2025 |
| 1960 | Time Planner | 19%(342/1717) | Mar 5, 2026 |
| 1961 | Period | 47%(12568/26519) | Apr 2, 2026 |
| 1962 | Corporative Network | 37%(1885/5012) | Apr 2, 2026 |
| 1963 | Cave Exploration | 18%(92/495) | Mar 10, 2026 |
| 1964 | City Game | 40%(2914/7252) | Apr 2, 2026 |
| 1965 | Cube Root | 26%(408/1541) | Mar 5, 2026 |
| 1966 | Cable TV Network | 47%(2985/6233) | Dec 17, 2025 |
| 1967 | Alibaba | 14%(133/946) | Apr 2, 2026 |
| 1968 | Booklets | 33%(300/886) | Apr 2, 2026 |
| 1969 | Count on Canton | 58%(5802/9983) | Apr 2, 2026 |
| 1970 | The Game | 25%(2081/8109) | Mar 8, 2026 |
| 1971 | Parallelogram Counting | 34%(2507/7202) | Apr 2, 2026 |
| 1972 | Dice Stacking | 61%(922/1510) | Dec 9, 2025 |
| 1973 | Software Company | 42%(549/1281) | Apr 2, 2026 |
| 1974 | The Happy Worm | 22%(1233/5465) | Apr 2, 2026 |
| 1975 | Median Weight Bead | 50%(2281/4489) | Apr 2, 2026 |
| 1976 | A Mini Locomotive | 55%(2851/5156) | Apr 2, 2026 |
| 1977 | Odd Loving Bakers | 33%(711/2146) | Apr 2, 2026 |
| 1978 | Hanafuda Shuffle | 57%(2495/4325) | Nov 20, 2025 |
| 1979 | Red and Black | 50%(37574/74777) | Apr 4, 2026 |
| 1980 | Unit Fraction Partition | 39%(1965/4927) | Dec 9, 2025 |
| 1981 | Circle and Points | 35%(3459/9731) | Nov 20, 2025 |
| 1982 | Water Tank | 34%(92/269) | Dec 9, 2025 |
| 1983 | Name the Crossing | 39%(143/359) | Mar 21, 2026 |
| 1984 | Navigation Nightmare | 36%(3961/10932) | Apr 2, 2026 |
| 1985 | Cow Marathon | 40%(5637/13948) | Apr 12, 2026 |
| 1986 | Distance Queries | 34%(7655/22462) | Mar 5, 2026 |
| 1987 | Distance Statistics | 35%(1061/2965) | Mar 5, 2026 |
| 1988 | Cube Stacking | 34%(13372/38498) | Apr 14, 2026 |
| 1989 | The Cow Lineup | 57%(3607/6285) | Apr 2, 2026 |
| 1990 | MooFest | 44%(6194/13808) | Apr 2, 2026 |
| 1991 | Turning in Homework | 42%(602/1416) | Apr 5, 2026 |
| 1992 | Jack | 37%(1267/3349) | Mar 20, 2026 |
| 1993 | Caleidoscope | 44%(353/798) | Apr 2, 2026 |
| 1994 | Logic | 19%(27/141) | Dec 9, 2025 |
| 1995 | Raising Modulo Numbers | 56%(15894/28270) | Apr 14, 2026 |
| 1996 | The Highest Profits | 43%(344/790) | Jan 8, 2026 |
| 1997 | Word Puzzle | 41%(519/1263) | Apr 2, 2026 |
| 1998 | Lloyd Fifteen Puzzle | 34%(269/787) | Apr 2, 2026 |
| 1999 | Quorf | 23%(123/525) | Apr 5, 2026 |
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