list of classical problems


ID NAME QUALITY USERS ACC % DIFFICULTY C I
55 Jasiek   3 379 25.67
21
13
56 Dyzio   7 1063 30.26
12
14
57 Supernumbers in a permutation   18 801 29.33
18
21
58 Crime at Piccadily Circus   3 615 13.83
31
24
59 Bytelandian Information Agency   2 341 18.22
17
23
60 The Gordian Dance   3 146 38.54
9
42
61 Brackets   173 4795 23.72
19
20
62 The Imp   1 250 29.30
17
26
63 Square Brackets   89 3542 57.01
13
18
64 Permutations   88 3902 52.10
11
20
65 Ball   2 141 40.91
26
17
66 Cross-country   38 3787 64.06
11
12
67 Cutting out   2 238 38.90
34
30
68 Expression   150 33.27
69 Moulds   2 85 31.64
17
17
70 Relations   1 211 26.13
71 Tree   2 411 28.55
12
9
73 Bacterial   1 66 20.53
50
17
75 Editor   51 45.04
76 Editor Inverse   63 18.23
77 New bricks disorder   1 244 35.71
78 Marbles   64 7016 34.19
15
13
82 Easy Problem   2 466 35.24
26
9
83 Bundling   1 20 27.16
84 Shortcut   1 215 28.63
17
17
85 Dice Contest   30 17.92
86 November Rain   4 252 15.86
23
23
87 Football   1 48 26.21
88 Which is Next   117 26.88
89 Hang or not to hang   1 59 19.61
17
17
90 Minimizing maximizer   2 301 23.74
17
28
91 Two squares or not two squares   74 5589 24.21
11
14
92 Cutting off Squares   218 41.91
94 Numeral System of the Maya   4 2499 40.34
10
6
95 Street Parade   309 15908 28.94
14
11
96 Shopping   42 2785 43.55
14
10
97 Party Schedule   245 8164 35.41
14
16
98 Dance Floor   2 660 39.66
12
12
99 Bus   170 21.48
100 Tower of Babylon   42 2832 49.78
19
21
101 Fishmonger   45 2152 37.40
18
21
102 GX Light Pipeline Inc   74 30.31
104 Highways   2 655 19.46
23
28
105 Alice and Bob   1 154 29.17
106 Binary Stirling Numbers   3 2273 34.72
5
18
107 Calendar of the Maya   5 125 47.43
26
21
108 Decoding Morse Sequences   7 713 24.92
24
17
109 Exchanges   118 46.60
110 Fill the Cisterns   28 1301 30.74
21
21
112 Horizontally Visible Segments   1 149 27.66
17
34

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