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list of classical problems


ID NAME QUALITY USERS ACC % DIFFICULTY C I
55 Jasiek   3 472 28.17
21
13
56 Dyzio   8 1221 31.44
11
14
57 Supernumbers in a permutation   22 1103 32.92
17
19
58 Crime at Piccadily Circus   3 650 14.02
31
21
59 Bytelandian Information Agency   2 420 19.65
17
23
60 The Gordian Dance   3 236 40.13
12
45
61 Brackets   178 5534 24.46
19
20
62 The Imp   1 298 31.18
17
23
63 Square Brackets   92 3877 56.70
14
18
64 Permutations   98 4382 52.21
12
20
65 Ball   2 158 34.92
17
23
66 Cross-country   38 4109 64.52
11
12
67 Cutting out   2 301 40.77
30
27
68 Expression   168 28.83
1
34
69 Moulds   2 133 34.66
12
12
70 Relations   2 253 28.68
9
17
71 Tree   3 458 28.55
12
9
73 Bacterial   1 75 18.63
50
17
75 Editor   51 27.31
76 Editor Inverse   69 16.09
77 New bricks disorder   1 289 37.73
17
17
78 Marbles   68 8175 34.97
15
13
82 Easy Problem   4 507 34.68
17
9
83 Bundling   1 56 34.62
17
17
84 Shortcut   1 236 31.49
17
9
85 Dice Contest   48 21.49
34
34
86 November Rain   4 300 17.57
21
21
87 Football   1 66 20.00
17
1
88 Which is Next   1 131 19.51
34
34
89 Hang or not to hang   1 64 15.38
17
17
90 Minimizing maximizer   3 387 24.81
17
26
91 Two squares or not two squares   79 6090 24.68
11
14
92 Cutting off Squares   -1 262 41.02
1
1
94 Numeral System of the Maya   4 2592 40.52
10
6
95 Street Parade   318 18566 29.07
14
11
96 Shopping   46 3094 44.18
15
11
97 Party Schedule   251 8936 36.23
14
16
98 Dance Floor   3 722 40.21
12
12
99 Bus   187 22.18
34
17
100 Tower of Babylon   45 3093 50.53
19
21
101 Fishmonger   48 2314 38.20
17
21
102 GX Light Pipeline Inc   79 30.99
104 Highways   2 810 20.46
23
28
105 Alice and Bob   3 176 26.73
42
42
106 Binary Stirling Numbers   3 2689 37.07
4
17
107 Calendar of the Maya   5 136 44.50
21
17
108 Decoding Morse Sequences   7 971 25.02
24
17
109 Exchanges   1 128 43.01
34
110 Fill the Cisterns   29 1421 31.46
21
20
112 Horizontally Visible Segments   1 161 27.97
17
34

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