list of classical problems


ID NAME QUALITY USERS ACC % DIFFICULTY C I
390 Billiard   2 870 54.26
13
17
391 Railroads   81 17.61
392 Spin   36 26.90
393 Hexagon   68 50.34
394 Alphacode   570 20833 26.80
15
15
395 Anti-prime Sequences   2 321 49.53
17
17
396 Hit or Miss   125 45.48
397 I Conduit   3 183 15.62
28
28
398 Roll Playing Games   114 13.86
399 Team Rankings   1 383 53.15
34
17
400 To and Fro   89 22503 55.82
14
7
401 Translations   126 37.74
402 Hike on a Graph   8 751 39.98
17
22
403 Sort fractions   5 687 32.67
9
20
404 Scanner   52 11.63
405 Tin Cutter   132 33.40
406 Logic   103 22.39
17
1
407 Random Number   41 30.00
408 Jill Rides Again   2 902 34.19
12
12
409 DEL Command   1 70 15.92
17
17
410 Variable Radix Huffman Encoding   1 170 18.38
411 Number of quite different words   4 236 33.30
17
30
412 K-path cover   177 19.91
413 Word Puzzles   4 355 17.88
30
14
414 Equatorial Bonfire   1 69 32.10
34
17
416 Divisibility by 15   5 1008 15.40
31
26
417 The lazy programmer   9 616 20.19
23
24
418 Necklace   39 16.19
419 Transposing is Fun   1 234 35.03
17
23
421 Another Road Problem   65 24.76
422 Transposing is Even More Fun   1 247 24.81
34
34
423 Assignments   233 4338 33.23
18
22
428 Particular Palindromes   5 490 32.04
23
28
449 Simple Numbers with Fractions Conversion   2 33 17.34
34
34
479 Permutation generator   1 121 27.77
28
23
481 Roots of polynomial   33 31.65
484 Fossil in the Ice   422 21.98
34
17
503 Prime Intervals   63 1653 15.85
21
19
515 Collatz   1 430 44.04
1
6
518 Zig-Zag Permutation   1 41 30.98
34
34
526 Divisors   36 1610 43.61
15
14
530 Divisors 2   10 832 52.00
14
17
598 Increasing Subsequences   139 33.78
660 Dungeon of Death   13 1315 42.76
13
28
661 Nail Them   12 951 42.73
9
13
665 String it out   22 1203 38.59
13
16
666 Con-Junctions   31 924 40.45
14
19
676 Sorting is not easy   8 531 39.53
22
32
677 A place for the brewery   205 27.32
681 Building the Tower   2 95 19.75
26
17

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