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list of classical problems


ID NAME QUALITY USERS ACC % DIFFICULTY C I
55 Jasiek   3 466 28.20
21
13
56 Dyzio   8 1215 31.42
11
14
57 Supernumbers in a permutation   22 1077 32.77
17
19
58 Crime at Piccadily Circus   3 642 13.95
31
21
59 Bytelandian Information Agency   2 414 19.54
17
23
60 The Gordian Dance   3 233 40.36
12
45
61 Brackets   177 5460 24.39
19
20
62 The Imp   1 292 30.31
17
23
63 Square Brackets   92 3855 56.72
14
18
64 Permutations   98 4338 52.00
12
20
65 Ball   2 154 35.28
17
23
66 Cross-country   38 4079 64.49
11
12
67 Cutting out   2 296 43.36
30
27
68 Expression   163 29.87
1
34
69 Moulds   2 132 35.21
12
12
70 Relations   2 250 28.61
9
17
71 Tree   3 451 28.48
12
9
73 Bacterial   1 71 19.06
50
17
75 Editor   51 33.33
76 Editor Inverse   64 14.75
77 New bricks disorder   1 285 37.73
17
17
78 Marbles   68 8015 34.97
15
13
82 Easy Problem   4 498 34.90
17
9
83 Bundling   1 53 40.00
17
17
84 Shortcut   1 233 31.59
17
9
85 Dice Contest   47 22.05
34
34
86 November Rain   4 295 17.53
21
21
87 Football   1 64 21.56
17
1
88 Which is Next   1 129 20.52
34
34
89 Hang or not to hang   1 61 15.67
17
17
90 Minimizing maximizer   3 379 24.71
17
26
91 Two squares or not two squares   79 6043 24.61
11
14
92 Cutting off Squares   -1 256 42.39
1
1
94 Numeral System of the Maya   4 2582 40.49
10
6
95 Street Parade   318 18351 29.03
14
11
96 Shopping   46 3066 44.10
15
11
97 Party Schedule   251 8867 36.19
14
16
98 Dance Floor   3 718 40.25
12
12
99 Bus   187 22.25
34
17
100 Tower of Babylon   44 3067 50.46
19
21
101 Fishmonger   48 2304 38.15
17
21
102 GX Light Pipeline Inc   77 31.02
104 Highways   2 776 20.06
23
28
105 Alice and Bob   3 172 27.05
42
42
106 Binary Stirling Numbers   3 2655 36.79
4
17
107 Calendar of the Maya   5 133 44.65
21
17
108 Decoding Morse Sequences   7 867 24.17
24
17
109 Exchanges   1 126 45.35
34
110 Fill the Cisterns   29 1410 31.33
21
20
112 Horizontally Visible Segments   1 158 27.95
17
34

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