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list of classical problems


ID NAME QUALITY USERS ACC % DIFFICULTY C I
390 Billiard   2 886 54.32
13
17
391 Railroads   84 17.69
17
17
392 Spin   38 24.40
1
17
393 Hexagon   70 48.70
17
1
394 Alphacode   577 22169 27.26
15
15
395 Anti-prime Sequences   2 338 49.32
9
9
396 Hit or Miss   129 44.75
1
1
397 I Conduit   3 190 15.40
21
21
398 Roll Playing Games   117 14.15
34
17
399 Team Rankings   1 385 53.26
17
9
400 To and Fro   90 23288 55.52
14
7
401 Translations   131 38.11
17
34
402 Hike on a Graph   8 762 40.21
15
19
403 Sort fractions   6 706 32.96
9
21
404 Scanner   56 12.24
405 Tin Cutter   134 33.72
17
17
406 Logic   107 22.51
17
9
407 Random Number   44 28.25
17
17
408 Jill Rides Again   2 935 34.10
9
9
409 DEL Command   1 73 16.93
17
17
410 Variable Radix Huffman Encoding   1 173 18.96
1
1
411 Number of quite different words   4 238 33.43
17
27
412 K-path cover   181 20.04
1
50
413 Word Puzzles   4 365 18.09
30
14
414 Equatorial Bonfire   1 71 30.48
34
17
416 Divisibility by 15   5 1017 15.44
31
26
417 The lazy programmer   9 645 20.09
21
23
418 Necklace   43 16.76
419 Transposing is Fun   1 282 36.89
17
26
421 Another Road Problem   67 24.36
17
34
422 Transposing is Even More Fun   2 288 25.99
28
39
423 Assignments   242 4647 33.53
18
21
428 Particular Palindromes   5 492 32.02
22
24
449 Simple Numbers with Fractions Conversion   2 34 17.11
17
17
479 Permutation generator   1 126 27.48
21
17
481 Roots of polynomial   37 24.90
17
34
484 Fossil in the Ice   434 22.09
34
17
503 Prime Intervals   65 1736 15.78
21
19
515 Collatz   1 443 43.44
1
5
518 Zig-Zag Permutation   1 42 31.02
26
26
526 Divisors   37 1684 43.57
14
13
530 Divisors 2   10 908 52.54
12
16
598 Increasing Subsequences   142 34.21
34
34
660 Dungeon of Death   14 1340 42.83
13
26
661 Nail Them   13 962 42.91
10
15
665 String it out   22 1216 38.76
12
15
666 Con-Junctions   32 984 40.62
14
19
676 Sorting is not easy   9 536 39.66
19
32
677 A place for the brewery   209 27.63
681 Building the Tower   2 96 19.61
26
17

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