list of classical problems


ID NAME QUALITY USERS ACC % DIFFICULTY C I
55 Jasiek   1 335 25.69
26
9
56 Dyzio   4 966 31.43
17
17
57 Supernumbers in a permutation   8 655 30.10
9
17
58 Crime at Piccadily Circus   4 590 13.87
34
26
59 Bytelandian Information Agency   306 18.11
60 The Gordian Dance   3 118 36.34
9
42
61 Brackets   121 3571 24.15
18
20
62 The Imp   243 30.20
17
17
63 Square Brackets   59 2793 56.40
15
19
64 Permutations   59 3200 54.45
11
20
65 Ball   2 136 42.37
26
17
66 Cross-country   29 3237 63.46
10
12
67 Cutting out   1 227 39.05
28
23
68 Expression   149 33.70
69 Moulds   1 82 31.08
17
17
70 Relations   206 26.01
71 Tree   2 391 28.44
12
9
73 Bacterial   1 65 21.34
50
17
75 Editor   51 46.83
76 Editor Inverse   63 18.67
77 New bricks disorder   1 215 34.84
78 Marbles   46 5582 33.10
14
13
82 Easy Problem   2 453 36.09
26
9
83 Bundling   1 18 24.69
84 Shortcut   192 28.95
85 Dice Contest   29 19.44
86 November Rain   1 224 16.34
34
17
87 Football   1 48 28.57
88 Which is Next   116 29.16
89 Hang or not to hang   58 18.72
90 Minimizing maximizer   273 23.83
17
34
91 Two squares or not two squares   54 4603 24.53
12
15
92 Cutting off Squares   215 42.18
94 Numeral System of the Maya   2 2421 40.03
12
4
95 Street Parade   181 10297 32.78
13
11
96 Shopping   30 2302 43.41
12
9
97 Party Schedule   152 6346 35.15
14
17
98 Dance Floor   2 625 39.28
12
12
99 Bus   165 21.04
100 Tower of Babylon   23 2390 50.20
17
19
101 Fishmonger   30 1861 38.40
15
19
102 GX Light Pipeline Inc   70 32.89
104 Highways   2 571 34.48
23
28
105 Alice and Bob   1 151 29.61
106 Binary Stirling Numbers   -1 2010 37.36
4
15
107 Calendar of the Maya   5 122 47.38
26
21
108 Decoding Morse Sequences   3 617 25.95
24
15
109 Exchanges   115 46.25
110 Fill the Cisterns   18 1050 32.70
20
21
112 Horizontally Visible Segments   138 28.53

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