list of classical problems


ID NAME QUALITY USERS ACC % DIFFICULTY C I
1876 Dragon Curves   1 163 49.87
1
34
1877 Enrich my purse   151 27.19
1878 Farmers Cattle   1 57 37.62
34
34
1879 Game Time   1 97 24.07
34
34
1880 Hanoi Calls   199 55.77
1881 Instruction Decoder   2 655 50.74
17
17
1960 Rectangles   2 150 17.92
34
28
1961 Roman Roads   1 96 30.54
9
17
1962 Circles   51 18.53
1963 Image Projections   99 33.15
1964 Tree cut   142 37.83
1965 Set Cover   1 24 12.32
1
17
1966 Ski Valley   109 18.10
1991 Another Continuous Fractions Problem   1 75 18.78
34
17
2000 Boxes (Hard)   1 15 3.08
17
34
2002 Random Number Generator   82 43.40
2005 Minus Operation   6 288 33.51
29
31
2006 Load Balancing   10 926 50.88
8
16
2007 Another Very Easy Problem! WOW!!!   14 707 40.23
14
28
2008 Dab of Backpack   17 616 23.70
21
17
2009 Cryptography   1 78 2.98
1
34
2019 The Rolling Ball   2 4.76
2021 Moving Pebbles   -1 175 20.50
50
34
2022 Truth Or Lie   100 22.91
2023 One Instruction Computer Simulator   1 38 9.94
34
34
2031 Please help You-Know-Who   31 31.01
2038 Rectangle Tiling   2 101 42.13
1
1
2047 Stone Removing Game   -1 124 37.22
2050 Strange Billboard   7 764 63.23
9
28
2051 Cell Phone   1 144 32.07
34
42
2052 Hexagonal Parcels   71 29.10
2053 Key Task   31 1028 33.31
24
21
2054 Gates of Logic   1 35 24.52
17
17
2055 Weird Numbers   1 335 35.46
17
17
2056 Rectangular Polygon   129 49.03
2058 Reaux! Sham! Beaux!   3 648 32.56
23
6
2059 Robotic Sort   4 266 28.61
24
27
2060 Tough Water Level   31 26.09
2070 Minimum Distance   73 19.39
2123 Candy I   72 21787 44.65
3
4
2124 Last Non-Zero Digit of Factorials   3 444 25.01
26
34
2125 Number Labyrinth   2 51 22.83
17
17
2127 Rain   2 419 39.71
13
13
2128 K-In-A-Row   4 410 34.42
13
9
2129 Cake   65 21.88
2130 Trolls   29 48.33
2131 Get Back!   51 39.85
2132 Puzzle   84 32.87
2136 Candy II   2 576 45.61
17
17
2138 Pibonacci   3 41 15.32
26
39

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