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list of classical problems


ID NAME QUALITY USERS ACC % DIFFICULTY C I
55 Jasiek   3 479 28.42
21
13
56 Dyzio   8 1225 31.47
11
14
57 Supernumbers in a permutation   22 1110 33.01
17
19
58 Crime at Piccadily Circus   3 651 14.03
31
21
59 Bytelandian Information Agency   2 421 19.64
17
23
60 The Gordian Dance   3 237 39.69
12
45
61 Brackets   178 5548 24.47
19
20
62 The Imp   1 300 31.14
17
23
63 Square Brackets   92 3888 56.74
14
18
64 Permutations   98 4412 52.19
12
20
65 Ball   2 159 35.03
17
23
66 Cross-country   38 4115 64.54
11
12
67 Cutting out   2 303 40.85
30
27
68 Expression   168 28.55
1
34
69 Moulds   2 136 34.99
12
12
70 Relations   2 254 28.80
9
17
71 Tree   3 465 28.80
12
9
73 Bacterial   1 76 18.66
50
17
75 Editor   51 26.94
76 Editor Inverse   69 15.98
77 New bricks disorder   1 290 37.79
17
17
78 Marbles   68 8227 34.99
15
13
82 Easy Problem   4 508 34.70
17
9
83 Bundling   1 57 34.04
17
17
84 Shortcut   1 237 31.56
17
9
85 Dice Contest   49 21.73
34
34
86 November Rain   4 301 17.60
21
21
87 Football   1 67 19.69
17
1
88 Which is Next   1 132 19.44
34
34
89 Hang or not to hang   1 66 15.60
17
17
90 Minimizing maximizer   3 389 24.84
17
26
91 Two squares or not two squares   79 6096 24.70
11
14
92 Cutting off Squares   -1 266 40.31
1
1
94 Numeral System of the Maya   4 2599 40.57
10
6
95 Street Parade   318 18625 29.08
14
11
96 Shopping   46 3100 44.19
15
11
97 Party Schedule   251 8959 36.24
14
16
98 Dance Floor   3 727 40.34
12
12
99 Bus   188 22.24
34
17
100 Tower of Babylon   45 3108 50.62
19
21
101 Fishmonger   48 2318 38.19
17
21
102 GX Light Pipeline Inc   80 31.09
104 Highways   2 821 20.59
23
28
105 Alice and Bob   3 179 26.74
42
42
106 Binary Stirling Numbers   3 2693 37.10
4
17
107 Calendar of the Maya   5 137 44.42
21
17
108 Decoding Morse Sequences   7 973 25.04
24
17
109 Exchanges   1 130 43.31
34
110 Fill the Cisterns   29 1425 31.42
21
20
112 Horizontally Visible Segments   1 162 27.39
17
34

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