list of classical problems


ID NAME QUALITY USERS ACC % DIFFICULTY C I
390 Billiard   -1 804 54.42
17
1
391 Railroads   81 17.59
392 Spin   36 27.08
393 Hexagon   66 49.65
394 Alphacode   348 14074 27.22
14
15
395 Anti-prime Sequences   1 303 52.78
396 Hit or Miss   -1 122 44.95
397 I Conduit   1 169 16.48
17
17
398 Roll Playing Games   114 14.12
399 Team Rankings   380 53.45
400 To and Fro   52 17535 56.16
14
7
401 Translations   123 37.56
402 Hike on a Graph   7 703 40.48
20
26
403 Sort fractions   4 661 32.97
9
17
404 Scanner   52 11.70
405 Tin Cutter   130 33.60
406 Logic   100 23.09
407 Random Number   40 30.57
408 Jill Rides Again   2 822 35.03
12
12
409 DEL Command   66 15.51
410 Variable Radix Huffman Encoding   1 134 18.37
411 Number of quite different words   4 224 33.79
17
30
412 K-path cover   169 19.76
413 Word Puzzles   2 325 19.19
34
17
414 Equatorial Bonfire   67 31.09
416 Divisibility by 15   4 971 15.43
27
21
417 The lazy programmer   1 399 20.03
9
17
418 Necklace   33 21.41
419 Transposing is Fun   174 40.20
34
421 Another Road Problem   66 25.24
422 Transposing is Even More Fun   185 29.07
423 Assignments   118 3002 32.92
18
22
428 Particular Palindromes   3 462 32.19
17
26
449 Simple Numbers with Fractions Conversion   31 16.41
479 Permutation generator   116 28.55
17
17
481 Roots of polynomial   33 32.26
484 Fossil in the Ice   346 20.61
34
17
503 Prime Intervals   39 1057 15.70
21
20
515 Collatz   2 402 48.96
1
9
518 Zig-Zag Permutation   38 30.00
526 Divisors   21 1159 45.83
17
13
530 Divisors 2   5 687 54.00
15
17
598 Increasing Subsequences   139 34.50
660 Dungeon of Death   10 1183 43.50
13
28
661 Nail Them   6 732 44.51
6
8
665 String it out   10 942 41.15
12
17
666 Con-Junctions   24 668 44.11
16
21
676 Sorting is not easy   4 494 39.27
13
34
677 A place for the brewery   200 27.06
681 Building the Tower   2 87 19.15
26
17

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