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list of classical problems


ID NAME QUALITY USERS ACC % DIFFICULTY C I
55 Jasiek   3 476 28.31
21
13
56 Dyzio   8 1222 31.44
11
14
57 Supernumbers in a permutation   22 1105 32.95
17
19
58 Crime at Piccadily Circus   3 651 14.03
31
21
59 Bytelandian Information Agency   2 421 19.67
17
23
60 The Gordian Dance   3 237 40.09
12
45
61 Brackets   178 5541 24.46
19
20
62 The Imp   1 299 31.20
17
23
63 Square Brackets   92 3883 56.71
14
18
64 Permutations   98 4399 52.21
12
20
65 Ball   2 159 35.03
17
23
66 Cross-country   38 4113 64.53
11
12
67 Cutting out   2 303 40.85
30
27
68 Expression   168 28.71
1
34
69 Moulds   2 135 34.72
12
12
70 Relations   2 254 28.80
9
17
71 Tree   3 463 28.72
12
9
73 Bacterial   1 75 18.60
50
17
75 Editor   51 26.94
76 Editor Inverse   69 15.98
77 New bricks disorder   1 290 37.79
17
17
78 Marbles   68 8196 34.97
15
13
82 Easy Problem   4 508 34.70
17
9
83 Bundling   1 57 34.04
17
17
84 Shortcut   1 237 31.56
17
9
85 Dice Contest   49 21.73
34
34
86 November Rain   4 301 17.60
21
21
87 Football   1 66 19.89
17
1
88 Which is Next   1 131 19.46
34
34
89 Hang or not to hang   1 65 15.56
17
17
90 Minimizing maximizer   3 388 24.83
17
26
91 Two squares or not two squares   79 6092 24.69
11
14
92 Cutting off Squares   -1 265 40.43
1
1
94 Numeral System of the Maya   4 2598 40.56
10
6
95 Street Parade   318 18595 29.08
14
11
96 Shopping   46 3095 44.18
15
11
97 Party Schedule   251 8944 36.23
14
16
98 Dance Floor   3 727 40.34
12
12
99 Bus   187 22.18
34
17
100 Tower of Babylon   45 3104 50.58
19
21
101 Fishmonger   48 2316 38.21
17
21
102 GX Light Pipeline Inc   80 31.17
104 Highways   2 819 20.56
23
28
105 Alice and Bob   3 177 26.82
42
42
106 Binary Stirling Numbers   3 2691 37.09
4
17
107 Calendar of the Maya   5 137 44.65
21
17
108 Decoding Morse Sequences   7 973 25.05
24
17
109 Exchanges   1 130 43.31
34
110 Fill the Cisterns   29 1423 31.43
21
20
112 Horizontally Visible Segments   1 162 27.56
17
34

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