list of classical problems


ID NAME QUALITY USERS ACC % DIFFICULTY C I
55 Jasiek   3 459 28.22
21
13
56 Dyzio   8 1204 31.51
11
14
57 Supernumbers in a permutation   20 982 32.09
17
19
58 Crime at Piccadily Circus   3 633 13.88
31
21
59 Bytelandian Information Agency   2 402 19.38
17
23
60 The Gordian Dance   3 206 39.12
12
45
61 Brackets   174 5373 24.43
19
20
62 The Imp   1 287 30.37
17
23
63 Square Brackets   92 3832 56.93
14
18
64 Permutations   97 4259 51.99
12
20
65 Ball   2 148 35.08
17
23
66 Cross-country   38 4049 64.54
11
12
67 Cutting out   2 285 42.20
30
27
68 Expression   158 30.57
1
34
69 Moulds   2 128 35.36
12
12
70 Relations   1 244 27.30
1
1
71 Tree   3 444 28.47
12
9
73 Bacterial   1 70 21.12
50
17
75 Editor   51 40.14
76 Editor Inverse   64 17.34
77 New bricks disorder   1 281 37.67
17
17
78 Marbles   67 7853 34.96
15
13
82 Easy Problem   4 490 34.76
17
9
83 Bundling   1 47 37.96
17
17
84 Shortcut   1 230 31.55
17
9
85 Dice Contest   41 20.32
34
34
86 November Rain   4 291 17.52
21
21
87 Football   57 21.31
17
1
88 Which is Next   126 20.81
34
34
89 Hang or not to hang   1 61 19.26
17
17
90 Minimizing maximizer   3 363 24.89
17
26
91 Two squares or not two squares   78 5987 24.53
11
14
92 Cutting off Squares   -1 247 42.66
1
1
94 Numeral System of the Maya   4 2573 40.49
10
6
95 Street Parade   317 17967 28.97
14
11
96 Shopping   45 3032 44.27
15
11
97 Party Schedule   250 8780 36.11
14
16
98 Dance Floor   3 711 40.28
12
12
99 Bus   180 21.86
34
17
100 Tower of Babylon   44 3048 50.53
19
21
101 Fishmonger   47 2284 38.06
17
20
102 GX Light Pipeline Inc   75 30.85
104 Highways   2 736 19.92
23
28
105 Alice and Bob   3 165 27.15
42
42
106 Binary Stirling Numbers   3 2610 36.54
4
17
107 Calendar of the Maya   5 130 44.93
21
17
108 Decoding Morse Sequences   7 788 24.27
24
17
109 Exchanges   1 125 45.71
34
110 Fill the Cisterns   28 1398 31.30
21
20
112 Horizontally Visible Segments   1 154 27.67
17
34

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