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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 1213 31.43
11
14
57 Supernumbers in a permutation   22 1075 32.76
17
19
58 Crime at Piccadily Circus   3 640 13.95
31
21
59 Bytelandian Information Agency   2 414 19.54
17
23
60 The Gordian Dance   3 233 40.39
12
45
61 Brackets   175 5455 24.41
19
20
62 The Imp   1 292 30.31
17
23
63 Square Brackets   92 3855 56.73
14
18
64 Permutations   98 4337 52.01
12
20
65 Ball   2 154 35.28
17
23
66 Cross-country   38 4076 64.48
11
12
67 Cutting out   2 296 43.23
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 70 18.93
50
17
75 Editor   51 33.33
76 Editor Inverse   64 14.75
77 New bricks disorder   1 285 37.82
17
17
78 Marbles   68 7999 34.96
15
13
82 Easy Problem   4 497 34.88
17
9
83 Bundling   1 53 40.82
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   3 376 24.62
17
26
91 Two squares or not two squares   79 6040 24.61
11
14
92 Cutting off Squares   -1 256 42.39
1
1
94 Numeral System of the Maya   4 2581 40.49
10
6
95 Street Parade   318 18318 29.01
14
11
96 Shopping   46 3063 44.11
15
11
97 Party Schedule   251 8860 36.19
14
16
98 Dance Floor   3 718 40.30
12
12
99 Bus   187 22.36
34
17
100 Tower of Babylon   44 3066 50.47
19
21
101 Fishmonger   48 2301 38.13
17
21
102 GX Light Pipeline Inc   76 30.54
104 Highways   2 775 20.06
23
28
105 Alice and Bob   3 172 27.27
42
42
106 Binary Stirling Numbers   3 2653 36.79
4
17
107 Calendar of the Maya   5 133 44.65
21
17
108 Decoding Morse Sequences   7 866 24.18
24
17
109 Exchanges   1 126 45.35
34
110 Fill the Cisterns   29 1409 31.33
21
20
112 Horizontally Visible Segments   1 158 27.95
17
34

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