list of classical problems


ID NAME QUALITY USERS ACC % DIFFICULTY C I
55 Jasiek   3 351 24.76
21
13
56 Dyzio   6 1020 30.00
13
13
57 Supernumbers in a permutation   17 769 30.32
18
21
58 Crime at Piccadily Circus   3 606 13.82
31
24
59 Bytelandian Information Agency   1 330 18.43
17
17
60 The Gordian Dance   3 140 38.11
9
42
61 Brackets   167 4498 24.74
18
20
62 The Imp   1 250 29.40
17
26
63 Square Brackets   88 3338 57.02
13
18
64 Permutations   83 3736 53.46
12
20
65 Ball   2 141 42.06
26
17
66 Cross-country   36 3641 64.05
11
12
67 Cutting out   2 233 38.92
34
30
68 Expression   150 34.05
69 Moulds   2 85 32.02
17
17
70 Relations   210 26.16
71 Tree   2 402 28.44
12
9
73 Bacterial   1 66 20.83
50
17
75 Editor   51 46.09
76 Editor Inverse   63 18.63
77 New bricks disorder   1 233 35.32
78 Marbles   63 6537 33.96
15
13
82 Easy Problem   2 463 35.64
26
9
83 Bundling   1 20 27.16
84 Shortcut   1 206 28.11
17
17
85 Dice Contest   30 18.66
86 November Rain   4 251 16.10
23
23
87 Football   1 48 27.84
88 Which is Next   117 28.48
89 Hang or not to hang   1 59 19.61
17
17
90 Minimizing maximizer   2 291 24.69
17
28
91 Two squares or not two squares   70 5346 25.32
11
14
92 Cutting off Squares   218 42.25
94 Numeral System of the Maya   3 2482 40.33
11
5
95 Street Parade   294 14733 30.59
14
11
96 Shopping   40 2647 44.62
14
10
97 Party Schedule   233 7734 35.82
14
16
98 Dance Floor   2 641 39.40
12
12
99 Bus   170 21.50
100 Tower of Babylon   40 2715 50.72
18
20
101 Fishmonger   45 2068 39.25
18
21
102 GX Light Pipeline Inc   78 32.01
104 Highways   2 627 34.70
23
28
105 Alice and Bob   1 155 29.84
106 Binary Stirling Numbers   3 2156 37.67
5
17
107 Calendar of the Maya   5 124 47.42
26
21
108 Decoding Morse Sequences   7 695 26.14
23
17
109 Exchanges   118 46.60
110 Fill the Cisterns   26 1246 31.15
21
21
112 Horizontally Visible Segments   1 147 28.00
17
34

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