list of classical problems


ID NAME QUALITY USERS ACC % DIFFICULTY C I
55 Jasiek   3 359 25.05
21
13
56 Dyzio   6 1041 30.28
13
13
57 Supernumbers in a permutation   17 777 30.27
18
21
58 Crime at Piccadily Circus   3 609 13.85
31
24
59 Bytelandian Information Agency   1 337 18.52
17
17
60 The Gordian Dance   3 143 38.32
9
42
61 Brackets   169 4591 24.85
18
20
62 The Imp   1 249 29.44
17
26
63 Square Brackets   88 3406 57.19
13
18
64 Permutations   85 3795 53.48
12
20
65 Ball   2 141 41.57
26
17
66 Cross-country   37 3691 64.22
11
12
67 Cutting out   2 235 38.71
34
30
68 Expression   150 33.75
69 Moulds   2 85 31.74
17
17
70 Relations   210 26.16
71 Tree   2 405 28.37
12
9
73 Bacterial   1 66 20.58
50
17
75 Editor   51 45.74
76 Editor Inverse   63 18.63
77 New bricks disorder   1 236 35.36
78 Marbles   63 6662 34.13
15
13
82 Easy Problem   2 466 35.54
26
9
83 Bundling   1 20 27.16
84 Shortcut   1 211 28.42
17
17
85 Dice Contest   30 18.38
86 November Rain   4 253 16.18
23
23
87 Football   1 48 27.27
88 Which is Next   117 27.80
89 Hang or not to hang   1 59 19.61
17
17
90 Minimizing maximizer   2 291 24.77
17
28
91 Two squares or not two squares   71 5417 25.35
10
14
92 Cutting off Squares   218 42.25
94 Numeral System of the Maya   3 2490 40.39
11
5
95 Street Parade   298 15041 30.55
14
11
96 Shopping   40 2686 44.72
14
10
97 Party Schedule   236 7883 35.96
14
16
98 Dance Floor   2 645 39.40
12
12
99 Bus   170 21.48
100 Tower of Babylon   41 2756 50.84
19
21
101 Fishmonger   45 2101 39.30
18
21
102 GX Light Pipeline Inc   78 32.01
104 Highways   2 635 34.21
23
28
105 Alice and Bob   1 155 29.80
106 Binary Stirling Numbers   3 2195 37.68
5
17
107 Calendar of the Maya   5 125 47.43
26
21
108 Decoding Morse Sequences   7 709 26.28
23
17
109 Exchanges   118 46.60
110 Fill the Cisterns   26 1268 31.24
21
21
112 Horizontally Visible Segments   1 150 28.15
17
34

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