list of classical problems


ID NAME QUALITY USERS ACC % DIFFICULTY C I
1876 Dragon Curves   2 174 50.12
1
17
1877 Enrich my purse   152 27.14
1878 Farmers Cattle   1 57 37.62
34
34
1879 Game Time   1 101 22.59
34
34
1880 Hanoi Calls   203 55.14
1881 Instruction Decoder   2 664 50.71
17
17
1960 Rectangles   3 163 16.43
34
28
1961 Roman Roads   1 97 30.58
9
17
1962 Circles   56 18.68
1963 Image Projections   102 31.50
1964 Tree cut   146 37.95
1965 Set Cover   2 25 12.42
1
17
1966 Ski Valley   114 18.90
1991 Another Continuous Fractions Problem   1 82 19.89
34
17
2000 Boxes (Hard)   2 17 3.07
26
34
2002 Random Number Generator   97 42.09
2005 Minus Operation   8 304 33.22
30
30
2006 Load Balancing   19 1883 47.41
11
19
2007 Another Very Easy Problem! WOW!!!   17 758 39.00
13
28
2008 Dab of Backpack   17 667 23.65
21
17
2009 Cryptography   1 142 4.80
1
34
2019 The Rolling Ball   2 3.57
2022 Truth Or Lie   101 22.44
2023 One Instruction Computer Simulator   41 11.22
42
42
2031 Please help You-Know-Who   35 32.89
2038 Rectangle Tiling   2 112 41.27
1
1
2047 Stone Removing Game   -1 132 38.11
2050 Strange Billboard   9 798 60.64
13
29
2051 Cell Phone   3 159 31.30
30
37
2052 Hexagonal Parcels   75 29.07
2053 Key Task   36 1170 31.66
24
22
2054 Gates of Logic   1 38 24.28
17
17
2055 Weird Numbers   1 339 35.63
17
17
2056 Rectangular Polygon   133 47.65
1
17
2058 Reaux! Sham! Beaux!   4 659 32.87
23
6
2059 Robotic Sort   5 606 31.23
28
26
2060 Tough Water Level   33 25.98
2070 Minimum Distance   77 19.18
17
1
2123 Candy I   95 28406 44.20
3
4
2124 Last Non-Zero Digit of Factorials   4 472 25.01
26
34
2125 Number Labyrinth   2 61 24.84
17
17
2127 Rain   3 432 40.34
17
14
2128 K-In-A-Row   5 436 33.52
13
9
2129 Cake   69 21.65
2130 Trolls   29 46.03
2131 Get Back!   54 42.14
2132 Puzzle   87 33.11
2136 Candy II   2 606 45.82
17
17
2138 Pibonacci   3 43 14.58
26
39
2139 Gossipers   3 589 31.73
21
26

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