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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 |
| 1908 | Grid Speed | 11%(41/369) | May 8, 2025 |
| 1910 | Adam's Genes | 11%(32/282) | May 15, 2025 |
| 1954 | Warez Test | 11%(39/334) | Mar 15, 2023 |
| 1919 | Ship Journey | 12%(54/417) | Apr 23, 2022 |
| 1967 | Alibaba | 14%(133/933) | Feb 27, 2025 |
| 1913 | Cocktails | 17%(102/596) | May 6, 2025 |
| 1902 | Illumination | 17%(60/338) | May 19, 2025 |
| 1911 | A Well-Formed Problem | 18%(89/484) | May 8, 2025 |
| 1963 | Cave Exploration | 18%(92/489) | Aug 29, 2025 |
| 1994 | Logic | 19%(27/139) | Jun 12, 2024 |
| 1912 | A highway and the seven dwarfs | 20%(734/3666) | Sep 1, 2025 |
| 1960 | Time Planner | 20%(342/1708) | Nov 22, 2024 |
| 1924 | The Treasure | 20%(492/2453) | Sep 4, 2025 |
| 1921 | Paper Cut | 20%(78/385) | Jan 29, 2025 |
| 1925 | Spiderman | 20%(1641/7984) | Aug 17, 2025 |
| 1956 | Pumps and Pipes | 20%(51/244) | Jun 22, 2023 |
| 1937 | Balanced Food | 21%(84/396) | Oct 2, 2023 |
| 1901 | Hypertransmission | 22%(454/2030) | Sep 1, 2025 |
| 1974 | The Happy Worm | 22%(1228/5448) | Aug 17, 2025 |
| 1999 | Quorf | 24%(123/510) | Jul 18, 2024 |
| 1914 | Cramer's Rule | 24%(790/3273) | Jun 21, 2025 |
| 1945 | Power Hungry Cows | 24%(1769/7327) | Sep 17, 2025 |
| 1951 | Extra Krunch | 25%(1946/7616) | Jul 25, 2025 |
| 1970 | The Game | 25%(2077/8103) | Jan 18, 2025 |
| 1965 | Cube Root | 26%(408/1533) | Dec 24, 2024 |
| 1905 | Expanding Rods | 26%(6285/23341) | Sep 13, 2025 |
| 1926 | Pollution | 27%(1146/4244) | May 25, 2025 |
| 1934 | Trip | 27%(2124/7821) | Jun 19, 2025 |
| 1942 | Paths on a Grid | 27%(9629/35087) | Sep 22, 2025 |
| 1932 | XYZZY | 28%(1337/4751) | May 25, 2025 |
| 1957 | Beehives | 28%(147/507) | Sep 1, 2025 |
| 1900 | Game | 29%(285/980) | Sep 8, 2025 |
| 1918 | Ranking List | 29%(523/1786) | May 25, 2025 |
| 1944 | Fiber Communications | 30%(1543/5117) | Sep 6, 2025 |
| 1916 | Rat Attack | 32%(368/1124) | Jun 25, 2025 |
| 1948 | Triangular Pastures | 33%(3426/10375) | Sep 16, 2025 |
| 1977 | Odd Loving Bakers | 33%(706/2133) | Jul 22, 2024 |
| 1923 | Fourier's Lines | 33%(944/2850) | May 25, 2025 |
| 1933 | A Brief Gerrymander | 33%(107/316) | Aug 27, 2021 |
| 1968 | Booklets | 33%(296/874) | Sep 2, 2025 |
| 1998 | Lloyd Fifteen Puzzle | 33%(263/775) | Nov 29, 2024 |
| 1903 | Jurassic Remains | 34%(782/2298) | Aug 12, 2025 |
| 1986 | Distance Queries | 34%(7648/22445) | Aug 19, 2025 |
| 1982 | Water Tank | 34%(92/267) | Dec 4, 2024 |
| 1988 | Cube Stacking | 34%(13342/38436) | Sep 27, 2025 |
| 1971 | Parallelogram Counting | 34%(2498/7170) | Aug 16, 2025 |
| 1943 | Hall of Fountains | 35%(314/897) | Dec 3, 2024 |
| 1907 | Work Reduction | 35%(633/1792) | May 22, 2025 |
| 1981 | Circle and Points | 35%(3458/9729) | Sep 20, 2025 |
| 1952 | BUY LOW, BUY LOWER | 35%(4515/12664) | Sep 14, 2025 |
| 1930 | Dead Fraction | 35%(2119/5936) | Aug 17, 2025 |
| 1987 | Distance Statistics | 35%(1059/2957) | Sep 10, 2025 |
| 1984 | Navigation Nightmare | 36%(3954/10912) | Aug 18, 2025 |
| 1950 | Dessert | 36%(2448/6750) | Sep 1, 2025 |
| 1904 | King's Quest | 36%(4293/11753) | Aug 14, 2025 |
| 1962 | Corporative Network | 37%(1874/4995) | Dec 16, 2024 |
| 1992 | Jack | 37%(1265/3338) | Sep 6, 2025 |
| 1938 | California Jones and the Gate to Freedom | 38%(317/821) | Sep 15, 2024 |
| 1935 | Journey | 38%(962/2483) | May 19, 2025 |
| 1939 | Diplomatic License | 39%(2859/7284) | Sep 1, 2025 |
| 1922 | Ride to School | 39%(10566/26626) | Sep 25, 2025 |
| 1980 | Unit Fraction Partition | 39%(1963/4924) | Dec 10, 2024 |
| 1964 | City Game | 40%(2901/7232) | Sep 23, 2025 |
| 1983 | Name the Crossing | 40%(141/349) | Jun 5, 2020 |
| 1985 | Cow Marathon | 40%(5605/13808) | Sep 17, 2025 |
| 1931 | Biometrics | 40%(443/1087) | May 25, 2025 |
| 1941 | The Sierpinski Fractal | 40%(2632/6434) | Sep 27, 2025 |
| 1928 | The Peanuts | 41%(3486/8499) | Sep 4, 2025 |
| 1936 | All in All | 41%(17379/42129) | Aug 14, 2025 |
| 1997 | Word Puzzle | 41%(516/1248) | Sep 1, 2025 |
| 1973 | Software Company | 42%(543/1268) | Jul 19, 2024 |
| 1991 | Turning in Homework | 42%(602/1402) | Aug 11, 2025 |
| 1996 | The Highest Profits | 43%(339/785) | Nov 2, 2024 |
| 1953 | World Cup Noise | 43%(11948/27588) | Sep 4, 2025 |
| 1993 | Caleidoscope | 43%(345/785) | Apr 30, 2024 |
| 1920 | Towers of Hanoi | 44%(1247/2802) | Sep 2, 2025 |
| 1927 | Area in Triangle | 44%(989/2221) | May 25, 2025 |
| 1990 | MooFest | 44%(6177/13771) | Aug 26, 2025 |
| 1955 | Rubik's Cube | 45%(381/841) | Sep 1, 2025 |
| 1906 | Three powers | 45%(2087/4588) | Aug 16, 2025 |
| 1915 | Knight Moves | 45%(18029/39549) | Sep 28, 2025 |
| 1947 | Rebuilding Roads | 45%(7232/15806) | Sep 25, 2025 |
| 1909 | Marbles on a tree | 46%(896/1929) | May 22, 2025 |
| 1949 | Chores | 46%(3593/7652) | Sep 6, 2025 |
| 1961 | Period | 47%(12546/26485) | Sep 19, 2025 |
| 1966 | Cable TV Network | 47%(2982/6228) | Aug 13, 2025 |
| 1917 | Automatic Poetry | 47%(1237/2578) | May 25, 2025 |
| 1979 | Red and Black | 50%(37259/73925) | Sep 18, 2025 |
| 1975 | Median Weight Bead | 50%(2271/4474) | Aug 19, 2025 |
| 1929 | Calories from Fat | 51%(648/1259) | May 25, 2025 |
| 1946 | Cow Cycling | 54%(1788/3258) | Sep 5, 2025 |
| 1976 | A Mini Locomotive | 55%(2835/5136) | Aug 17, 2025 |
| 1995 | Raising Modulo Numbers | 56%(15547/27757) | Sep 27, 2025 |
| 1958 | Strange Towers of Hanoi | 57%(3545/6202) | Sep 27, 2025 |
| 1989 | The Cow Lineup | 57%(3602/6275) | Sep 5, 2025 |
| 1978 | Hanafuda Shuffle | 57%(2493/4323) | Sep 13, 2025 |
| 1959 | Darts | 57%(906/1570) | Aug 16, 2024 |
| 1969 | Count on Canton | 58%(5790/9970) | Aug 14, 2025 |
| 1972 | Dice Stacking | 61%(921/1506) | Feb 1, 2025 |
| 1940 | Polygon Programming with Ease | 61%(878/1427) | Sep 4, 2025 |
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