list of classical problems


ID NAME QUALITY USERS ACC % DIFFICULTY C I
391 Railroads   82 17.56
392 Spin   36 27.08
393 Hexagon   68 50.34
394 Alphacode   539 18509 27.10
14
15
395 Anti-prime Sequences   1 316 53.24
396 Hit or Miss   -1 122 44.95
397 I Conduit   3 187 17.33
28
28
398 Roll Playing Games   116 14.10
399 Team Rankings   383 53.42
400 To and Fro   85 20580 55.98
13
7
401 Translations   125 37.68
402 Hike on a Graph   8 739 40.38
17
22
403 Sort fractions   5 683 32.78
9
20
404 Scanner   52 11.67
405 Tin Cutter   133 33.59
406 Logic   103 22.65
17
1
407 Random Number   41 30.61
408 Jill Rides Again   2 863 34.41
12
12
409 DEL Command   1 67 15.66
17
17
410 Variable Radix Huffman Encoding   1 171 18.93
411 Number of quite different words   4 239 33.94
17
30
412 K-path cover   181 20.42
413 Word Puzzles   4 355 19.75
30
14
414 Equatorial Bonfire   1 69 32.10
34
17
416 Divisibility by 15   5 998 15.60
31
26
417 The lazy programmer   9 577 20.56
22
23
418 Necklace   44 19.62
419 Transposing is Fun   190 40.67
34
421 Another Road Problem   66 25.24
422 Transposing is Even More Fun   205 30.54
423 Assignments   210 3951 34.64
18
22
428 Particular Palindromes   5 488 32.78
23
28
449 Simple Numbers with Fractions Conversion   2 34 17.54
34
34
479 Permutation generator   119 27.95
26
26
481 Roots of polynomial   33 31.65
484 Fossil in the Ice   412 22.23
34
17
503 Prime Intervals   57 1484 15.94
21
19
515 Collatz   1 424 44.62
1
6
518 Zig-Zag Permutation   1 41 30.98
34
34
526 Divisors   34 1495 47.25
16
14
530 Divisors 2   8 774 54.87
15
17
598 Increasing Subsequences   139 34.36
660 Dungeon of Death   12 1282 44.41
13
28
661 Nail Them   10 932 42.96
8
12
665 String it out   20 1151 41.18
12
16
666 Con-Junctions   30 826 43.69
14
19
676 Sorting is not easy   7 520 39.41
23
34
677 A place for the brewery   203 27.27
681 Building the Tower   2 93 19.62
26
17
682 Pairs of Integers   198 25.69

Most popular tags