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list of classical problems


ID NAME QUALITY USERS ACC % DIFFICULTY C I
66 Cross-country   38 4054 64.52
11
12
65 Ball   2 148 35.08
17
23
64 Permutations   98 4269 51.95
12
20
63 Square Brackets   92 3835 56.89
14
18
62 The Imp   1 288 30.42
17
23
61 Brackets   175 5388 24.44
19
20
60 The Gordian Dance   3 206 39.08
12
45
59 Bytelandian Information Agency   2 404 19.42
17
23
58 Crime at Piccadily Circus   3 635 13.90
31
21
57 Supernumbers in a permutation   20 984 32.13
17
19
56 Dyzio   8 1206 31.44
11
14
55 Jasiek   3 460 28.20
21
13
54 Julka   162 22884 27.43
19
6
51 Fake tournament   42 1786 27.31
18
19
50 Invitation Cards   29 1715 43.05
16
18
49 Hares and Foxes   1 106 8.04
17
26
48 Glass Beads   27 3350 37.77
15
17
47 Skyscraper Floors   5 281 12.65
26
17
45 Commedia dell Arte   2 235 34.51
5
26
44 Substitution Cipher   2 320 13.50
17
17
43 Copying Books   45 2721 25.53
19
19
42 Adding Reversed Numbers   103 75882 48.42
6
4
41 Play on Words   42 3204 19.39
21
24
40 Lifting the Stone   6 1593 23.52
13
16
39 Piggy-Bank   139 8070 35.44
14
16
38 Labyrinth   97 5283 25.76
17
16
37 The Proper Key   1 135 15.63
17
17
36 Secret Code   6 536 36.74
17
17
35 Equipment Box   6 1296 14.63
7
20
34 Run Away   2 468 21.93
26
34
33 Trip   18 1938 25.94
25
16
32 A Needle in the Haystack   192 10819 38.16
15
13
31 Fast Multiplication   48 8617 20.64
15
12
30 Bytelandian Blingors Network   54 3717 39.05
14
10
29 Hash it!   14 3571 24.19
14
8
28 Help the Military Recruitment Office!   6 772 16.10
12
9
27 Sorting Bank Accounts   53 8688 40.49
11
6
26 Build the Fence   37 2199 28.23
22
17
25 Pouring water   100 5332 24.12
19
22
24 Small factorials   153 49330 29.70
15
9
23 Pyramids   -20 5595 36.96
9
15
22 Triangle From Centroid   9 2631 46.64
9
22
20 The Bytelandian Cryptographer (Act IV)   2 55 25.07
21
34
19 The Bytelandian Cryptographer (Act III)   1 128 37.90
17
26
18 The Bytelandian Cryptographer (Act II)   4 663 30.00
25
1
17 The Bytelandian Cryptographer (Act I)   8 1344 41.90
15
26
16 Sphere in a tetrahedron   12 3476 56.50
11
16
15 The Shortest Path   156 7461 24.12
17
12
14 I-Keyboard   6 1262 43.58
24
23
13 Hotline   2 193 16.38
34
23

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