list of classical problems


ID NAME QUALITY USERS ACC % DIFFICULTY C I
55 Jasiek   1 343 24.84
26
9
56 Dyzio   5 1004 30.68
15
15
57 Supernumbers in a permutation   12 728 30.83
12
17
58 Crime at Piccadily Circus   3 598 13.80
34
26
59 Bytelandian Information Agency   312 18.28
60 The Gordian Dance   3 126 36.47
9
42
61 Brackets   153 4199 24.67
19
20
62 The Imp   1 250 29.44
17
26
63 Square Brackets   80 3147 56.85
14
19
64 Permutations   74 3485 54.13
12
20
65 Ball   2 141 42.06
26
17
66 Cross-country   36 3498 63.71
11
12
67 Cutting out   1 231 39.22
28
23
68 Expression   150 34.05
69 Moulds   1 83 31.19
17
17
70 Relations   210 26.16
71 Tree   2 398 28.34
12
9
73 Bacterial   1 66 21.10
50
17
75 Editor   51 46.09
76 Editor Inverse   63 18.63
77 New bricks disorder   1 228 35.11
78 Marbles   56 6086 33.50
15
13
82 Easy Problem   2 461 35.56
26
9
83 Bundling   1 20 27.16
84 Shortcut   1 201 28.17
17
17
85 Dice Contest   30 18.94
86 November Rain   4 245 16.25
23
23
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   1 289 24.44
17
34
91 Two squares or not two squares   69 5103 25.05
11
14
92 Cutting off Squares   218 42.31
94 Numeral System of the Maya   3 2467 40.25
11
5
95 Street Parade   245 13168 31.01
13
11
96 Shopping   36 2518 44.29
13
10
97 Party Schedule   205 7245 35.71
14
16
98 Dance Floor   2 637 39.47
12
12
99 Bus   169 21.44
100 Tower of Babylon   34 2579 51.09
18
21
101 Fishmonger   40 2002 38.99
16
20
102 GX Light Pipeline Inc   78 32.56
104 Highways   2 606 34.69
23
28
105 Alice and Bob   1 152 29.67
106 Binary Stirling Numbers   2 2096 37.59
4
17
107 Calendar of the Maya   5 123 47.26
26
21
108 Decoding Morse Sequences   4 674 26.01
23
15
109 Exchanges   117 46.44
110 Fill the Cisterns   25 1171 31.87
20
21
112 Horizontally Visible Segments   1 145 28.78
17
34

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