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list of classical problems


ID NAME QUALITY USERS ACC % DIFFICULTY C I
1875 Cool Numbers   6 165 30.29
30
34
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   2 665 50.73
17
17
1960 Rectangles   4 168 16.55
34
28
1961 Roman Roads   1 97 30.58
9
17
1962 Circles   57 19.46
1963 Image Projections   104 32.61
1964 Tree cut   145 37.66
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 33.25
30
30
2006 Load Balancing   19 1901 47.57
11
19
2007 Another Very Easy Problem! WOW!!!   17 777 39.07
13
28
2008 Dab of Backpack   17 669 23.64
21
17
2009 Cryptography   1 142 4.80
1
34
2019 The Rolling Ball   3 5.26
2022 Truth Or Lie   102 22.42
2023 One Instruction Computer Simulator   40 9.77
42
42
2031 Please help You-Know-Who   36 33.33
2038 Rectangle Tiling   2 112 40.75
1
1
2047 Stone Removing Game   -1 131 37.87
2050 Strange Billboard   10 802 60.65
13
29
2051 Cell Phone   4 159 31.34
28
36
2052 Hexagonal Parcels   75 29.07
2053 Key Task   37 1184 31.76
24
22
2054 Gates of Logic   1 38 24.28
17
17
2055 Weird Numbers   2 341 35.75
17
17
2056 Rectangular Polygon   1 134 47.66
1
17
2058 Reaux! Sham! Beaux!   4 660 32.89
23
6
2059 Robotic Sort   5 679 32.56
28
26
2060 Tough Water Level   34 26.34
2070 Minimum Distance   81 16.84
17
1
2123 Candy I   97 28707 44.23
4
5
2124 Last Non-Zero Digit of Factorials   4 476 25.08
26
34
2125 Number Labyrinth   2 61 24.84
17
17
2127 Rain   4 434 40.43
20
15
2128 K-In-A-Row   6 438 33.46
17
11
2129 Cake   70 21.63
2130 Trolls   29 46.03
2131 Get Back!   1 53 40.00
17
17
2132 Puzzle   85 32.11
2136 Candy II   2 607 45.90
17
17
2138 Pibonacci   3 43 14.58
26
39

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