list of classical problems


ID NAME QUALITY USERS ACC % DIFFICULTY C I
55 Jasiek   1 336 25.08
26
9
56 Dyzio   4 973 31.21
17
17
57 Supernumbers in a permutation   9 665 30.03
10
17
58 Crime at Piccadily Circus   4 593 13.87
34
26
59 Bytelandian Information Agency   306 17.70
60 The Gordian Dance   3 119 36.28
9
42
61 Brackets   128 3679 24.29
18
20
62 The Imp   243 29.46
17
17
63 Square Brackets   60 2850 56.69
15
19
64 Permutations   63 3254 54.52
12
20
65 Ball   2 137 42.51
26
17
66 Cross-country   30 3316 63.50
10
11
67 Cutting out   1 229 39.21
28
23
68 Expression   149 33.70
69 Moulds   1 83 31.29
17
17
70 Relations   207 26.06
71 Tree   2 391 28.44
12
9
73 Bacterial   1 66 21.46
50
17
75 Editor   51 46.83
76 Editor Inverse   63 18.67
77 New bricks disorder   1 219 34.55
78 Marbles   49 5677 33.11
14
12
82 Easy Problem   2 455 35.53
26
9
83 Bundling   1 19 26.25
84 Shortcut   194 28.94
85 Dice Contest   29 19.14
86 November Rain   1 228 16.29
34
17
87 Football   1 48 28.57
88 Which is Next   117 29.32
89 Hang or not to hang   1 59 19.61
17
17
90 Minimizing maximizer   276 23.78
17
34
91 Two squares or not two squares   57 4702 24.59
11
15
92 Cutting off Squares   216 42.26
94 Numeral System of the Maya   2 2430 40.07
12
4
95 Street Parade   193 10771 32.61
14
11
96 Shopping   32 2342 43.66
13
10
97 Party Schedule   166 6523 35.27
14
17
98 Dance Floor   2 627 39.26
12
12
99 Bus   165 21.04
100 Tower of Babylon   25 2431 50.47
17
20
101 Fishmonger   32 1895 38.52
15
19
102 GX Light Pipeline Inc   70 32.89
104 Highways   2 578 33.95
23
28
105 Alice and Bob   1 151 29.61
106 Binary Stirling Numbers   -1 2031 37.42
4
15
107 Calendar of the Maya   5 122 47.38
26
21
108 Decoding Morse Sequences   3 631 25.96
24
15
109 Exchanges   115 46.25
110 Fill the Cisterns   18 1072 32.58
20
21
112 Horizontally Visible Segments   138 28.48

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