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list of classical problems


ID NAME QUALITY USERS ACC % DIFFICULTY C I
55 Jasiek   3 460 28.21
21
13
56 Dyzio   8 1205 31.52
11
14
57 Supernumbers in a permutation   20 983 32.09
17
19
58 Crime at Piccadily Circus   3 635 13.90
31
21
59 Bytelandian Information Agency   2 403 19.40
17
23
60 The Gordian Dance   3 206 39.08
12
45
61 Brackets   174 5381 24.42
19
20
62 The Imp   1 288 30.42
17
23
63 Square Brackets   92 3834 56.91
14
18
64 Permutations   98 4264 51.96
12
20
65 Ball   2 148 35.08
17
23
66 Cross-country   38 4052 64.55
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 7860 34.95
15
13
82 Easy Problem   4 490 34.74
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 17.44
21
21
87 Football   57 21.31
17
1
88 Which is Next   126 20.75
34
34
89 Hang or not to hang   1 61 19.26
17
17
90 Minimizing maximizer   3 364 24.93
17
26
91 Two squares or not two squares   78 5989 24.54
11
14
92 Cutting off Squares   -1 247 42.38
1
1
94 Numeral System of the Maya   4 2573 40.49
10
6
95 Street Parade   317 17987 28.96
14
11
96 Shopping   45 3034 44.25
15
11
97 Party Schedule   250 8786 36.10
14
16
98 Dance Floor   3 711 40.28
12
12
99 Bus   180 21.86
34
17
100 Tower of Babylon   44 3050 50.53
19
21
101 Fishmonger   47 2285 38.07
17
20
102 GX Light Pipeline Inc   75 30.85
104 Highways   2 739 19.93
23
28
105 Alice and Bob   3 165 27.12
42
42
106 Binary Stirling Numbers   3 2617 36.56
4
17
107 Calendar of the Maya   5 130 44.93
21
17
108 Decoding Morse Sequences   7 788 24.26
24
17
109 Exchanges   1 123 45.14
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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