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list of classical problems


ID NAME QUALITY USERS ACC % DIFFICULTY C I
55 Jasiek   3 470 27.91
21
13
56 Dyzio   8 1217 31.39
11
14
57 Supernumbers in a permutation   22 1094 32.92
17
19
58 Crime at Piccadily Circus   3 647 13.95
31
21
59 Bytelandian Information Agency   2 418 19.60
17
23
60 The Gordian Dance   3 236 40.49
12
45
61 Brackets   177 5489 24.40
19
20
62 The Imp   1 296 30.34
17
23
63 Square Brackets   92 3872 56.67
14
18
64 Permutations   98 4363 52.07
12
20
65 Ball   2 155 34.95
17
23
66 Cross-country   38 4100 64.49
11
12
67 Cutting out   2 298 41.04
30
27
68 Expression   164 28.83
1
34
69 Moulds   2 133 34.89
12
12
70 Relations   2 251 28.65
9
17
71 Tree   3 454 28.52
12
9
73 Bacterial   1 72 18.71
50
17
75 Editor   51 33.15
76 Editor Inverse   66 15.80
77 New bricks disorder   1 286 37.71
17
17
78 Marbles   68 8101 34.96
15
13
82 Easy Problem   4 502 34.87
17
9
83 Bundling   1 53 38.46
17
17
84 Shortcut   1 236 31.69
17
9
85 Dice Contest   48 21.10
34
34
86 November Rain   4 298 17.56
21
21
87 Football   1 67 21.13
17
1
88 Which is Next   1 130 19.97
34
34
89 Hang or not to hang   1 62 15.78
17
17
90 Minimizing maximizer   3 382 24.75
17
26
91 Two squares or not two squares   79 6077 24.66
11
14
92 Cutting off Squares   -1 259 41.64
1
1
94 Numeral System of the Maya   4 2588 40.52
10
6
95 Street Parade   318 18490 29.06
14
11
96 Shopping   46 3084 44.17
15
11
97 Party Schedule   251 8903 36.21
14
16
98 Dance Floor   3 718 40.07
12
12
99 Bus   188 22.29
34
17
100 Tower of Babylon   45 3081 50.49
19
21
101 Fishmonger   48 2313 38.23
17
21
102 GX Light Pipeline Inc   77 30.21
104 Highways   2 799 20.31
23
28
105 Alice and Bob   3 174 26.87
42
42
106 Binary Stirling Numbers   3 2683 36.95
4
17
107 Calendar of the Maya   5 136 44.85
21
17
108 Decoding Morse Sequences   7 872 24.19
24
17
109 Exchanges   1 127 44.26
34
110 Fill the Cisterns   29 1414 31.37
21
20
112 Horizontally Visible Segments   1 159 27.43
17
34

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