list of classical problems


ID NAME QUALITY USERS ACC % DIFFICULTY C I
390 Billiard   2 886 54.38
13
17
391 Railroads   84 17.74
17
17
392 Spin   37 24.39
1
17
393 Hexagon   69 48.68
17
1
394 Alphacode   574 21923 27.18
15
15
395 Anti-prime Sequences   2 330 49.83
9
9
396 Hit or Miss   129 45.45
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   89 23216 55.55
14
7
401 Translations   131 38.11
17
34
402 Hike on a Graph   8 760 40.16
15
19
403 Sort fractions   6 706 32.96
9
21
404 Scanner   55 12.11
405 Tin Cutter   134 33.72
17
17
406 Logic   107 22.51
17
9
407 Random Number   43 27.93
17
17
408 Jill Rides Again   2 930 34.12
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   4 364 18.07
30
14
414 Equatorial Bonfire   1 71 30.48
34
17
416 Divisibility by 15   5 1017 15.45
31
26
417 The lazy programmer   9 644 20.07
21
23
418 Necklace   43 16.76
419 Transposing is Fun   1 272 36.17
17
26
421 Another Road Problem   67 24.36
17
34
422 Transposing is Even More Fun   1 279 25.58
26
34
423 Assignments   242 4602 33.54
18
21
428 Particular Palindromes   5 492 32.02
22
24
449 Simple Numbers with Fractions Conversion   2 34 17.15
17
17
479 Permutation generator   1 125 27.43
21
17
481 Roots of polynomial   37 24.90
17
34
484 Fossil in the Ice   433 22.15
34
17
503 Prime Intervals   64 1720 15.76
21
19
515 Collatz   1 438 43.40
1
5
518 Zig-Zag Permutation   1 41 30.65
34
34
526 Divisors   37 1679 43.55
14
14
530 Divisors 2   10 900 52.41
14
17
598 Increasing Subsequences   141 33.90
660 Dungeon of Death   14 1339 42.87
13
26
661 Nail Them   12 961 42.87
9
13
665 String it out   22 1215 38.75
13
16
666 Con-Junctions   32 980 40.57
14
19
676 Sorting is not easy   9 535 39.62
19
32
677 A place for the brewery   209 27.63
681 Building the Tower   2 97 20.03
26
17

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