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list of classical problems


ID NAME QUALITY USERS ACC % DIFFICULTY C I
55 Jasiek   3 468 28.11
21
13
56 Dyzio   8 1216 31.39
11
14
57 Supernumbers in a permutation   22 1090 32.87
17
19
58 Crime at Piccadily Circus   3 645 13.92
31
21
59 Bytelandian Information Agency   2 416 19.55
17
23
60 The Gordian Dance   3 234 40.35
12
45
61 Brackets   177 5480 24.38
19
20
62 The Imp   1 295 30.40
17
23
63 Square Brackets   92 3869 56.71
14
18
64 Permutations   98 4359 52.04
12
20
65 Ball   2 154 34.84
17
23
66 Cross-country   38 4096 64.47
11
12
67 Cutting out   2 297 41.02
30
27
68 Expression   164 29.33
1
34
69 Moulds   2 132 34.82
12
12
70 Relations   2 250 28.58
9
17
71 Tree   3 453 28.48
12
9
73 Bacterial   1 72 18.86
50
17
75 Editor   51 33.15
76 Editor Inverse   66 15.80
77 New bricks disorder   1 285 37.69
17
17
78 Marbles   68 8081 34.94
15
13
82 Easy Problem   4 501 34.83
17
9
83 Bundling   1 53 38.96
17
17
84 Shortcut   1 234 31.63
17
9
85 Dice Contest   47 21.71
34
34
86 November Rain   4 296 17.55
21
21
87 Football   1 65 20.80
17
1
88 Which is Next   1 129 20.03
34
34
89 Hang or not to hang   1 61 15.63
17
17
90 Minimizing maximizer   3 381 24.71
17
26
91 Two squares or not two squares   79 6075 24.66
11
14
92 Cutting off Squares   -1 257 41.82
1
1
94 Numeral System of the Maya   4 2587 40.52
10
6
95 Street Parade   318 18450 29.06
14
11
96 Shopping   46 3082 44.17
15
11
97 Party Schedule   251 8894 36.20
14
16
98 Dance Floor   3 718 40.16
12
12
99 Bus   187 22.23
34
17
100 Tower of Babylon   45 3077 50.46
19
21
101 Fishmonger   48 2310 38.20
17
21
102 GX Light Pipeline Inc   77 31.02
104 Highways   2 793 20.25
23
28
105 Alice and Bob   3 173 26.98
42
42
106 Binary Stirling Numbers   3 2681 36.92
4
17
107 Calendar of the Maya   5 134 44.44
21
17
108 Decoding Morse Sequences   7 871 24.17
24
17
109 Exchanges   1 126 44.97
34
110 Fill the Cisterns   29 1413 31.35
21
20
112 Horizontally Visible Segments   1 159 27.86
17
34

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