list of classical problems


ID NAME QUALITY USERS ACC % DIFFICULTY C I
55 Jasiek   1 338 24.97
26
9
56 Dyzio   4 983 31.25
17
17
57 Supernumbers in a permutation   11 696 30.64
10
17
58 Crime at Piccadily Circus   3 596 13.88
34
26
59 Bytelandian Information Agency   308 17.74
60 The Gordian Dance   3 126 36.47
9
42
61 Brackets   140 3928 24.52
18
20
62 The Imp   1 246 29.65
17
26
63 Square Brackets   66 2935 56.90
16
20
64 Permutations   70 3345 54.67
12
20
65 Ball   2 138 42.14
26
17
66 Cross-country   33 3399 63.40
11
12
67 Cutting out   1 229 39.21
28
23
68 Expression   149 33.58
69 Moulds   1 83 31.29
17
17
70 Relations   207 25.96
71 Tree   2 394 28.19
12
9
73 Bacterial   1 66 21.10
50
17
75 Editor   51 46.09
76 Editor Inverse   63 18.67
77 New bricks disorder   1 223 34.80
78 Marbles   52 5837 33.24
14
13
82 Easy Problem   2 458 35.47
26
9
83 Bundling   1 20 27.16
84 Shortcut   195 28.64
85 Dice Contest   29 18.85
86 November Rain   2 233 16.37
26
17
87 Football   1 48 28.57
88 Which is Next   117 29.32
89 Hang or not to hang   1 59 19.61
17
17
90 Minimizing maximizer   277 23.74
17
34
91 Two squares or not two squares   63 4864 24.69
11
14
92 Cutting off Squares   216 42.26
94 Numeral System of the Maya   2 2439 40.09
12
4
95 Street Parade   215 11700 31.93
14
11
96 Shopping   33 2407 43.99
13
10
97 Party Schedule   181 6831 35.41
14
17
98 Dance Floor   2 635 39.43
12
12
99 Bus   166 21.17
100 Tower of Babylon   28 2488 50.71
18
20
101 Fishmonger   36 1939 38.86
16
20
102 GX Light Pipeline Inc   71 32.69
104 Highways   2 598 34.60
23
28
105 Alice and Bob   1 152 29.71
106 Binary Stirling Numbers   -1 2051 37.34
4
15
107 Calendar of the Maya   5 122 47.09
26
21
108 Decoding Morse Sequences   3 645 25.78
24
15
109 Exchanges   117 46.44
110 Fill the Cisterns   22 1131 32.11
20
21
112 Horizontally Visible Segments   1 141 28.42
17
34

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