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list of classical problems


ID NAME QUALITY USERS ACC % DIFFICULTY C I
69 Moulds   2 130 35.33
12
12
68 Expression   160 30.27
1
34
67 Cutting out   2 287 42.33
30
27
66 Cross-country   38 4064 64.47
11
12
65 Ball   2 150 35.06
17
23
64 Permutations   98 4299 51.93
12
20
63 Square Brackets   92 3843 56.85
14
18
62 The Imp   1 289 30.38
17
23
61 Brackets   175 5406 24.42
19
20
60 The Gordian Dance   3 207 38.93
12
45
59 Bytelandian Information Agency   2 406 19.43
17
23
58 Crime at Piccadily Circus   3 636 13.91
31
21
57 Supernumbers in a permutation   22 1053 32.58
17
19
56 Dyzio   8 1209 31.41
11
14
55 Jasiek   3 462 28.12
21
13
54 Julka   163 23006 27.47
19
6
51 Fake tournament   42 1791 27.29
18
19
50 Invitation Cards   29 1725 42.94
16
18
49 Hares and Foxes   1 107 7.83
17
26
48 Glass Beads   29 3380 37.85
15
18
47 Skyscraper Floors   6 282 12.63
24
17
45 Commedia dell Arte   2 238 34.44
5
26
44 Substitution Cipher   2 322 13.52
17
17
43 Copying Books   45 2740 25.53
19
19
42 Adding Reversed Numbers   103 76867 48.37
6
4
41 Play on Words   42 3211 19.38
21
24
40 Lifting the Stone   6 1603 23.50
13
16
39 Piggy-Bank   140 8097 35.44
14
16
38 Labyrinth   97 5291 25.75
17
16
37 The Proper Key   1 135 15.46
17
17
36 Secret Code   6 540 36.48
17
17
35 Equipment Box   6 1303 14.60
7
20
34 Run Away   2 474 21.91
26
34
33 Trip   18 1949 25.94
25
16
32 A Needle in the Haystack   193 10949 38.21
15
14
31 Fast Multiplication   48 8747 20.71
15
12
30 Bytelandian Blingors Network   54 3725 39.08
14
10
29 Hash it!   14 3585 24.13
14
8
28 Help the Military Recruitment Office!   6 776 16.10
12
9
27 Sorting Bank Accounts   53 8764 40.43
11
6
26 Build the Fence   37 2217 28.15
22
17
25 Pouring water   100 5377 24.20
19
22
24 Small factorials   153 49788 29.69
15
9
23 Pyramids   -20 5613 36.88
9
15
22 Triangle From Centroid   9 2646 46.41
9
22
20 The Bytelandian Cryptographer (Act IV)   2 55 26.85
21
34
19 The Bytelandian Cryptographer (Act III)   1 128 37.80
17
26
18 The Bytelandian Cryptographer (Act II)   4 664 29.78
25
1
17 The Bytelandian Cryptographer (Act I)   8 1349 41.70
15
26
16 Sphere in a tetrahedron   12 3493 56.32
11
16

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