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list of classical problems


ID NAME QUALITY USERS ACC % DIFFICULTY C I
55 Jasiek   3 462 28.12
21
13
56 Dyzio   8 1209 31.41
11
14
57 Supernumbers in a permutation   22 1053 32.58
17
19
58 Crime at Piccadily Circus   3 636 13.91
31
21
59 Bytelandian Information Agency   2 406 19.43
17
23
60 The Gordian Dance   3 207 38.93
12
45
61 Brackets   175 5406 24.42
19
20
62 The Imp   1 289 30.38
17
23
63 Square Brackets   92 3843 56.85
14
18
64 Permutations   98 4299 51.93
12
20
65 Ball   2 150 35.06
17
23
66 Cross-country   38 4064 64.47
11
12
67 Cutting out   2 287 42.33
30
27
68 Expression   160 30.27
1
34
69 Moulds   2 130 35.33
12
12
70 Relations   1 246 27.20
1
1
71 Tree   3 447 28.48
12
9
73 Bacterial   1 70 19.97
50
17
75 Editor   51 39.33
76 Editor Inverse   64 17.34
77 New bricks disorder   1 283 37.72
17
17
78 Marbles   68 7900 34.96
15
13
82 Easy Problem   4 491 34.72
17
9
83 Bundling   1 49 38.85
17
17
84 Shortcut   1 231 31.61
17
9
85 Dice Contest   44 21.14
34
34
86 November Rain   4 292 17.48
21
21
87 Football   1 60 21.86
17
1
88 Which is Next   1 127 20.65
34
34
89 Hang or not to hang   1 61 19.26
17
17
90 Minimizing maximizer   3 365 24.96
17
26
91 Two squares or not two squares   79 6014 24.58
11
14
92 Cutting off Squares   -1 250 42.55
1
1
94 Numeral System of the Maya   4 2577 40.50
10
6
95 Street Parade   318 18196 29.02
14
11
96 Shopping   46 3046 44.14
15
11
97 Party Schedule   250 8835 36.15
14
16
98 Dance Floor   3 716 40.30
12
12
99 Bus   182 22.10
34
17
100 Tower of Babylon   44 3056 50.51
19
21
101 Fishmonger   48 2294 38.09
17
21
102 GX Light Pipeline Inc   75 30.85
104 Highways   2 750 19.97
23
28
105 Alice and Bob   3 166 27.04
42
42
106 Binary Stirling Numbers   3 2622 36.55
4
17
107 Calendar of the Maya   5 131 44.59
21
17
108 Decoding Morse Sequences   7 855 23.99
24
17
109 Exchanges   1 124 45.17
34
110 Fill the Cisterns   28 1401 31.32
21
20
112 Horizontally Visible Segments   1 155 27.70
17
34

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