list of classical problems


ID NAME QUALITY USERS ACC % DIFFICULTY C I
55 Jasiek   3 459 28.23
21
13
56 Dyzio   8 1203 31.59
11
14
57 Supernumbers in a permutation   20 980 32.05
17
19
58 Crime at Piccadily Circus   3 632 13.82
31
21
59 Bytelandian Information Agency   2 401 19.36
17
23
60 The Gordian Dance   3 206 39.29
12
45
61 Brackets   174 5363 24.44
19
20
62 The Imp   1 287 30.37
17
23
63 Square Brackets   92 3830 56.93
14
18
64 Permutations   97 4250 52.04
12
20
65 Ball   2 148 35.08
17
23
66 Cross-country   38 4046 64.53
11
12
67 Cutting out   2 285 42.20
30
27
68 Expression   158 30.71
1
34
69 Moulds   2 126 35.06
12
12
70 Relations   1 241 27.25
1
1
71 Tree   3 440 28.43
12
9
73 Bacterial   1 69 21.25
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 7842 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 17.56
21
21
87 Football   57 22.41
17
1
88 Which is Next   126 21.09
34
34
89 Hang or not to hang   1 61 19.26
17
17
90 Minimizing maximizer   3 362 24.87
17
26
91 Two squares or not two squares   78 5977 24.53
11
14
92 Cutting off Squares   -1 244 42.64
1
1
94 Numeral System of the Maya   4 2571 40.50
10
6
95 Street Parade   318 17919 28.95
14
11
96 Shopping   45 3029 44.32
15
11
97 Party Schedule   250 8769 36.11
14
16
98 Dance Floor   2 708 40.25
12
12
99 Bus   180 21.88
34
17
100 Tower of Babylon   44 3046 50.52
19
21
101 Fishmonger   47 2284 38.07
17
20
102 GX Light Pipeline Inc   75 30.85
104 Highways   2 731 19.93
23
28
105 Alice and Bob   3 165 27.15
42
42
106 Binary Stirling Numbers   3 2606 36.52
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

Most popular tags