list of classical problems


ID NAME QUALITY USERS ACC % DIFFICULTY C I
55 Jasiek   3 362 25.15
21
13
56 Dyzio   6 1041 30.01
13
13
57 Supernumbers in a permutation   17 776 29.02
18
21
58 Crime at Piccadily Circus   3 611 13.80
31
24
59 Bytelandian Information Agency   2 338 18.26
17
26
60 The Gordian Dance   3 143 38.22
9
42
61 Brackets   170 4631 23.53
19
20
62 The Imp   1 249 29.44
17
26
63 Square Brackets   89 3435 56.85
13
18
64 Permutations   86 3814 51.97
12
20
65 Ball   2 141 41.38
26
17
66 Cross-country   37 3715 63.77
11
12
67 Cutting out   2 235 38.66
34
30
68 Expression   150 33.63
69 Moulds   2 85 31.64
17
17
70 Relations   210 26.16
71 Tree   2 404 28.30
12
9
73 Bacterial   1 66 20.58
50
17
75 Editor   51 45.38
76 Editor Inverse   63 18.27
77 New bricks disorder   1 237 35.42
78 Marbles   63 6758 33.84
15
13
82 Easy Problem   2 464 35.32
26
9
83 Bundling   1 20 27.16
84 Shortcut   1 211 28.32
17
17
85 Dice Contest   30 17.92
86 November Rain   4 253 16.18
23
23
87 Football   1 48 27.27
88 Which is Next   117 27.56
89 Hang or not to hang   1 59 19.61
17
17
90 Minimizing maximizer   2 284 22.97
17
28
91 Two squares or not two squares   71 5440 24.05
10
14
92 Cutting off Squares   218 42.25
94 Numeral System of the Maya   3 2491 40.36
11
5
95 Street Parade   299 15281 28.95
14
11
96 Shopping   40 2708 43.41
14
10
97 Party Schedule   240 7952 35.19
14
16
98 Dance Floor   2 648 39.40
12
12
99 Bus   170 21.48
100 Tower of Babylon   42 2766 49.65
19
21
101 Fishmonger   45 2116 37.21
18
21
102 GX Light Pipeline Inc   78 32.01
104 Highways   2 633 19.29
23
28
105 Alice and Bob   1 155 29.80
106 Binary Stirling Numbers   3 2215 34.35
5
17
107 Calendar of the Maya   5 125 47.43
26
21
108 Decoding Morse Sequences   7 705 24.87
23
17
109 Exchanges   118 46.60
110 Fill the Cisterns   27 1271 30.63
21
21
112 Horizontally Visible Segments   1 148 27.79
17
34

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