list of classical problems


ID NAME QUALITY USERS ACC % DIFFICULTY C I
390 Billiard   822 54.49
17
1
391 Railroads   81 17.44
392 Spin   36 27.08
393 Hexagon   66 49.65
394 Alphacode   447 16443 27.03
14
15
395 Anti-prime Sequences   1 312 53.05
396 Hit or Miss   -1 122 44.95
397 I Conduit   3 179 17.22
28
28
398 Roll Playing Games   116 14.27
399 Team Rankings   381 53.44
400 To and Fro   68 19150 56.08
14
7
401 Translations   124 37.53
402 Hike on a Graph   8 721 40.56
17
22
403 Sort fractions   4 668 32.87
9
17
404 Scanner   52 11.67
405 Tin Cutter   132 33.73
406 Logic   100 23.09
407 Random Number   40 30.57
408 Jill Rides Again   2 841 34.97
12
12
409 DEL Command   66 15.51
410 Variable Radix Huffman Encoding   1 170 19.04
411 Number of quite different words   4 237 34.36
17
30
412 K-path cover   174 20.22
413 Word Puzzles   2 340 19.29
34
17
414 Equatorial Bonfire   1 69 32.10
34
17
416 Divisibility by 15   5 988 15.55
31
26
417 The lazy programmer   4 497 20.29
9
17
418 Necklace   43 15.97
419 Transposing is Fun   181 40.75
34
421 Another Road Problem   66 25.24
422 Transposing is Even More Fun   195 30.09
423 Assignments   173 3557 34.02
18
22
428 Particular Palindromes   5 479 32.70
23
28
449 Simple Numbers with Fractions Conversion   1 32 16.31
34
34
479 Permutation generator   117 27.75
17
17
481 Roots of polynomial   33 32.26
484 Fossil in the Ice   391 21.58
34
17
503 Prime Intervals   46 1294 15.87
21
19
515 Collatz   1 420 44.77
1
6
518 Zig-Zag Permutation   39 30.22
526 Divisors   30 1339 46.75
16
15
530 Divisors 2   8 726 54.36
15
17
598 Increasing Subsequences   139 34.50
660 Dungeon of Death   12 1249 44.08
13
28
661 Nail Them   10 881 42.75
8
12
665 String it out   12 1042 41.62
11
19
666 Con-Junctions   27 753 44.14
14
19
676 Sorting is not easy   6 504 39.19
17
31
677 A place for the brewery   202 27.19
681 Building the Tower   2 91 19.68
26
17

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