list of classical problems


ID NAME QUALITY USERS ACC % DIFFICULTY C I
55 Jasiek   3 424 27.28
21
13
56 Dyzio   7 1149 31.25
12
14
57 Supernumbers in a permutation   19 899 31.03
17
19
58 Crime at Piccadily Circus   3 622 13.89
31
24
59 Bytelandian Information Agency   2 374 19.00
17
23
60 The Gordian Dance   3 187 39.28
12
45
61 Brackets   173 5144 24.25
19
20
62 The Imp   1 255 29.10
17
23
63 Square Brackets   91 3728 57.05
14
18
64 Permutations   93 4096 52.08
11
20
65 Ball   2 142 36.94
26
17
66 Cross-country   38 3936 64.53
11
12
67 Cutting out   2 260 40.67
30
27
68 Expression   151 32.54
1
34
69 Moulds   2 100 33.24
12
12
70 Relations   1 222 26.76
1
1
71 Tree   3 423 28.32
12
9
73 Bacterial   1 66 19.96
50
17
75 Editor   51 43.38
76 Editor Inverse   64 18.29
77 New bricks disorder   1 267 37.22
17
17
78 Marbles   66 7472 34.65
15
13
82 Easy Problem   4 477 35.04
17
9
83 Bundling   1 26 28.97
17
17
84 Shortcut   1 223 31.30
17
9
85 Dice Contest   33 18.53
34
34
86 November Rain   4 276 17.06
23
23
87 Football   49 23.50
17
1
88 Which is Next   118 24.12
89 Hang or not to hang   1 60 19.78
17
17
90 Minimizing maximizer   3 333 24.50
17
28
91 Two squares or not two squares   77 5843 24.50
11
14
92 Cutting off Squares   -1 224 42.36
1
1
94 Numeral System of the Maya   4 2542 40.40
10
6
95 Street Parade   315 17053 28.94
14
11
96 Shopping   45 2917 43.99
14
11
97 Party Schedule   249 8537 35.92
14
16
98 Dance Floor   2 688 40.22
12
12
99 Bus   174 21.81
100 Tower of Babylon   42 2957 50.29
19
21
101 Fishmonger   46 2223 37.89
18
21
102 GX Light Pipeline Inc   74 30.06
104 Highways   2 692 19.55
23
28
105 Alice and Bob   2 156 28.23
34
34
106 Binary Stirling Numbers   4 2501 36.10
4
17
107 Calendar of the Maya   5 128 45.85
21
17
108 Decoding Morse Sequences   7 747 24.67
24
17
109 Exchanges   1 120 45.54
34
110 Fill the Cisterns   28 1362 31.10
21
21
112 Horizontally Visible Segments   1 151 27.62
17
34

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