list of classical problems


ID NAME QUALITY USERS ACC % DIFFICULTY C I
55 Jasiek   3 472 28.19
21
13
56 Dyzio   8 1220 31.44
11
14
57 Supernumbers in a permutation   22 1098 32.87
17
19
58 Crime at Piccadily Circus   3 648 14.00
31
21
59 Bytelandian Information Agency   2 420 19.67
17
23
60 The Gordian Dance   3 236 40.26
12
45
61 Brackets   177 5499 24.42
19
20
62 The Imp   1 297 30.44
17
23
63 Square Brackets   92 3874 56.69
14
18
64 Permutations   98 4370 52.10
12
20
65 Ball   2 155 34.70
17
23
66 Cross-country   38 4102 64.50
11
12
67 Cutting out   2 299 40.73
30
27
68 Expression   166 28.83
1
34
69 Moulds   2 133 34.81
12
12
70 Relations   2 253 28.73
9
17
71 Tree   3 454 28.48
12
9
73 Bacterial   1 73 18.63
50
17
75 Editor   51 31.72
76 Editor Inverse   68 16.12
77 New bricks disorder   1 287 37.64
17
17
78 Marbles   68 8132 34.97
15
13
82 Easy Problem   4 505 34.65
17
9
83 Bundling   1 55 34.83
17
17
84 Shortcut   1 235 31.49
17
9
85 Dice Contest   48 21.62
34
34
86 November Rain   4 300 17.59
21
21
87 Football   1 66 20.16
17
1
88 Which is Next   1 131 19.65
34
34
89 Hang or not to hang   1 62 15.61
17
17
90 Minimizing maximizer   3 386 24.82
17
26
91 Two squares or not two squares   79 6084 24.67
11
14
92 Cutting off Squares   -1 260 41.53
1
1
94 Numeral System of the Maya   4 2591 40.53
10
6
95 Street Parade   318 18531 29.07
14
11
96 Shopping   46 3088 44.21
15
11
97 Party Schedule   251 8917 36.20
14
16
98 Dance Floor   3 722 40.25
12
12
99 Bus   188 22.33
34
17
100 Tower of Babylon   45 3084 50.50
19
21
101 Fishmonger   48 2313 38.20
17
21
102 GX Light Pipeline Inc   79 31.22
104 Highways   2 806 20.45
23
28
105 Alice and Bob   3 176 26.83
42
42
106 Binary Stirling Numbers   3 2686 37.05
4
17
107 Calendar of the Maya   5 136 44.74
21
17
108 Decoding Morse Sequences   7 908 24.63
24
17
109 Exchanges   1 127 43.43
34
110 Fill the Cisterns   29 1416 31.42
21
20
112 Horizontally Visible Segments   1 161 27.97
17
34

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