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list of classical problems


ID NAME QUALITY USERS ACC % DIFFICULTY C I
55 Jasiek   3 469 28.04
21
13
56 Dyzio   8 1219 31.42
11
14
57 Supernumbers in a permutation   22 1097 32.90
17
19
58 Crime at Piccadily Circus   3 647 13.95
31
21
59 Bytelandian Information Agency   2 418 19.60
17
23
60 The Gordian Dance   3 235 40.28
12
45
61 Brackets   177 5491 24.40
19
20
62 The Imp   1 296 30.39
17
23
63 Square Brackets   92 3872 56.68
14
18
64 Permutations   98 4365 52.06
12
20
65 Ball   2 154 34.59
17
23
66 Cross-country   38 4101 64.49
11
12
67 Cutting out   2 297 40.93
30
27
68 Expression   164 28.71
1
34
69 Moulds   2 132 34.74
12
12
70 Relations   2 252 28.71
9
17
71 Tree   3 454 28.52
12
9
73 Bacterial   1 73 18.78
50
17
75 Editor   51 33.15
76 Editor Inverse   66 15.77
77 New bricks disorder   1 286 37.70
17
17
78 Marbles   68 8116 34.96
15
13
82 Easy Problem   4 503 34.89
17
9
83 Bundling   1 53 38.46
17
17
84 Shortcut   1 235 31.57
17
9
85 Dice Contest   47 21.52
34
34
86 November Rain   4 298 17.53
21
21
87 Football   1 65 20.56
17
1
88 Which is Next   1 130 19.72
34
34
89 Hang or not to hang   1 62 15.78
17
17
90 Minimizing maximizer   3 383 24.76
17
26
91 Two squares or not two squares   79 6078 24.66
11
14
92 Cutting off Squares   -1 258 41.30
1
1
94 Numeral System of the Maya   4 2590 40.52
10
6
95 Street Parade   318 18501 29.07
14
11
96 Shopping   46 3087 44.21
15
11
97 Party Schedule   251 8907 36.20
14
16
98 Dance Floor   3 720 40.19
12
12
99 Bus   188 22.33
34
17
100 Tower of Babylon   45 3083 50.49
19
21
101 Fishmonger   48 2313 38.21
17
21
102 GX Light Pipeline Inc   77 30.21
104 Highways   2 802 20.36
23
28
105 Alice and Bob   3 174 26.81
42
42
106 Binary Stirling Numbers   3 2686 37.05
4
17
107 Calendar of the Maya   5 136 44.85
21
17
108 Decoding Morse Sequences   7 881 24.30
24
17
109 Exchanges   1 126 43.99
34
110 Fill the Cisterns   29 1415 31.41
21
20
112 Horizontally Visible Segments   1 160 27.92
17
34

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