list of classical problems


ID NAME QUALITY USERS ACC % DIFFICULTY C I
55 Jasiek   3 384 25.85
21
13
56 Dyzio   7 1078 30.43
12
14
57 Supernumbers in a permutation   18 811 29.49
17
19
58 Crime at Piccadily Circus   3 617 13.86
31
24
59 Bytelandian Information Agency   2 342 18.21
17
23
60 The Gordian Dance   3 148 38.69
12
45
61 Brackets   172 4840 23.75
19
20
62 The Imp   1 251 29.31
17
23
63 Square Brackets   89 3572 56.99
13
18
64 Permutations   90 3942 52.17
11
20
65 Ball   2 141 40.27
26
17
66 Cross-country   38 3809 64.16
11
12
67 Cutting out   2 239 38.97
30
27
68 Expression   151 33.33
1
34
69 Moulds   2 87 31.67
12
12
70 Relations   1 213 26.25
1
1
71 Tree   2 413 28.50
12
9
73 Bacterial   1 66 20.53
50
17
75 Editor   51 45.04
76 Editor Inverse   64 18.38
77 New bricks disorder   1 245 35.77
78 Marbles   66 7097 34.21
15
13
82 Easy Problem   2 467 35.26
26
9
83 Bundling   1 20 27.16
84 Shortcut   1 215 28.60
17
17
85 Dice Contest   30 17.86
86 November Rain   4 252 15.74
23
23
87 Football   1 48 26.09
88 Which is Next   117 26.54
89 Hang or not to hang   1 59 19.61
17
17
90 Minimizing maximizer   2 306 23.87
17
28
91 Two squares or not two squares   75 5649 24.28
11
14
92 Cutting off Squares   220 42.02
94 Numeral System of the Maya   4 2513 40.36
10
6
95 Street Parade   309 16106 28.97
14
11
96 Shopping   43 2807 43.59
14
10
97 Party Schedule   247 8238 35.50
14
16
98 Dance Floor   2 665 39.71
12
12
99 Bus   170 21.48
100 Tower of Babylon   42 2850 49.89
19
21
101 Fishmonger   45 2156 37.41
18
21
102 GX Light Pipeline Inc   74 30.31
104 Highways   2 657 19.46
23
28
105 Alice and Bob   1 154 29.09
106 Binary Stirling Numbers   3 2299 34.86
5
18
107 Calendar of the Maya   5 125 47.29
26
21
108 Decoding Morse Sequences   7 719 24.98
24
17
109 Exchanges   118 46.60
110 Fill the Cisterns   28 1315 30.78
21
21
112 Horizontally Visible Segments   1 150 27.71
17
34

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