list of classical problems


ID NAME QUALITY USERS ACC % DIFFICULTY C I
390 Billiard   1 853 54.45
12
12
391 Railroads   80 17.39
392 Spin   36 26.90
393 Hexagon   68 50.34
394 Alphacode   560 19846 26.58
15
15
395 Anti-prime Sequences   2 315 49.64
17
17
396 Hit or Miss   -1 123 45.13
397 I Conduit   3 183 15.77
28
28
398 Roll Playing Games   114 13.86
399 Team Rankings   381 53.24
400 To and Fro   87 21646 55.76
14
7
401 Translations   126 37.74
402 Hike on a Graph   8 744 40.10
17
22
403 Sort fractions   5 685 32.63
9
20
404 Scanner   52 11.67
405 Tin Cutter   132 33.40
406 Logic   103 22.39
17
1
407 Random Number   41 30.46
408 Jill Rides Again   2 876 34.36
12
12
409 DEL Command   1 68 15.83
17
17
410 Variable Radix Huffman Encoding   1 169 18.69
411 Number of quite different words   4 236 33.30
17
30
412 K-path cover   174 19.68
413 Word Puzzles   4 345 17.74
30
14
414 Equatorial Bonfire   1 69 32.10
34
17
416 Divisibility by 15   5 995 15.23
31
26
417 The lazy programmer   9 599 20.05
23
25
418 Necklace   39 16.21
419 Transposing is Fun   1 196 34.29
17
23
421 Another Road Problem   65 24.76
422 Transposing is Even More Fun   1 209 23.94
34
34
423 Assignments   226 4186 33.19
18
22
428 Particular Palindromes   5 486 31.97
23
28
449 Simple Numbers with Fractions Conversion   2 33 17.34
34
34
479 Permutation generator   1 120 27.94
28
23
481 Roots of polynomial   33 31.65
484 Fossil in the Ice   415 21.87
34
17
503 Prime Intervals   61 1574 15.85
20
19
515 Collatz   1 430 44.41
1
6
518 Zig-Zag Permutation   1 41 30.98
34
34
526 Divisors   35 1560 43.54
16
14
530 Divisors 2   9 796 51.88
15
17
598 Increasing Subsequences   138 33.91
660 Dungeon of Death   13 1304 42.59
13
28
661 Nail Them   12 941 42.53
9
13
665 String it out   21 1178 38.46
13
16
666 Con-Junctions   30 867 40.75
14
19
676 Sorting is not easy   8 529 39.62
22
32
677 A place for the brewery   205 27.35
681 Building the Tower   2 94 19.75
26
17

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