list of classical problems


ID NAME QUALITY USERS ACC % DIFFICULTY C I
390 Billiard   -1 813 54.51
17
1
391 Railroads   81 17.59
392 Spin   36 27.08
393 Hexagon   66 49.65
394 Alphacode   403 15555 27.17
14
15
395 Anti-prime Sequences   1 309 52.86
396 Hit or Miss   -1 122 44.95
397 I Conduit   3 177 17.12
28
28
398 Roll Playing Games   114 14.12
399 Team Rankings   380 53.45
400 To and Fro   58 18533 56.18
14
7
401 Translations   124 37.62
402 Hike on a Graph   8 716 40.58
17
22
403 Sort fractions   4 666 32.96
9
17
404 Scanner   52 11.70
405 Tin Cutter   131 33.60
406 Logic   100 23.09
407 Random Number   40 30.57
408 Jill Rides Again   2 830 35.14
12
12
409 DEL Command   66 15.51
410 Variable Radix Huffman Encoding   1 169 18.98
411 Number of quite different words   4 237 34.40
17
30
412 K-path cover   173 20.15
413 Word Puzzles   2 335 19.02
34
17
414 Equatorial Bonfire   1 69 32.10
34
17
416 Divisibility by 15   4 981 15.52
27
21
417 The lazy programmer   4 468 20.21
9
17
418 Necklace   33 20.65
419 Transposing is Fun   177 40.02
34
421 Another Road Problem   66 25.24
422 Transposing is Even More Fun   191 29.23
423 Assignments   151 3309 33.37
18
22
428 Particular Palindromes   4 476 32.62
17
24
449 Simple Numbers with Fractions Conversion   1 31 16.41
34
34
479 Permutation generator   117 27.94
17
17
481 Roots of polynomial   33 32.26
484 Fossil in the Ice   370 21.03
34
17
503 Prime Intervals   42 1200 15.79
21
20
515 Collatz   1 413 45.77
1
6
518 Zig-Zag Permutation   39 30.22
526 Divisors   25 1264 46.09
15
12
530 Divisors 2   5 709 54.22
15
17
598 Increasing Subsequences   139 34.50
660 Dungeon of Death   11 1225 43.69
13
28
661 Nail Them   10 827 43.49
8
10
665 String it out   10 999 41.73
12
17
666 Con-Junctions   26 715 44.36
15
20
676 Sorting is not easy   4 499 39.13
13
34
677 A place for the brewery   201 27.14
681 Building the Tower   2 90 19.58
26
17

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