list of classical problems


ID NAME QUALITY USERS ACC % DIFFICULTY C I
391 Railroads   81 17.44
392 Spin   36 27.08
393 Hexagon   68 50.34
394 Alphacode   514 17727 27.01
14
15
395 Anti-prime Sequences   1 313 52.88
396 Hit or Miss   -1 122 44.95
397 I Conduit   3 186 17.53
28
28
398 Roll Playing Games   116 14.10
399 Team Rankings   382 53.37
400 To and Fro   74 19872 55.92
14
7
401 Translations   124 37.53
402 Hike on a Graph   8 726 40.14
17
22
403 Sort fractions   5 678 32.72
9
20
404 Scanner   52 11.67
405 Tin Cutter   132 33.73
406 Logic   101 23.25
17
1
407 Random Number   41 30.61
408 Jill Rides Again   2 848 34.57
12
12
409 DEL Command   1 67 15.66
17
17
410 Variable Radix Huffman Encoding   1 171 19.05
411 Number of quite different words   4 237 34.36
17
30
412 K-path cover   177 20.44
413 Word Puzzles   3 346 19.44
34
17
414 Equatorial Bonfire   1 69 32.10
34
17
416 Divisibility by 15   5 994 15.56
31
26
417 The lazy programmer   8 553 20.40
20
24
418 Necklace   44 19.71
419 Transposing is Fun   185 40.72
34
421 Another Road Problem   66 25.24
422 Transposing is Even More Fun   198 30.55
423 Assignments   201 3783 34.50
18
22
428 Particular Palindromes   5 485 32.87
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   401 22.03
34
17
503 Prime Intervals   52 1406 15.97
21
19
515 Collatz   1 421 44.75
1
6
518 Zig-Zag Permutation   1 40 30.60
34
34
526 Divisors   32 1436 47.12
16
15
530 Divisors 2   8 754 54.55
15
17
598 Increasing Subsequences   139 34.50
660 Dungeon of Death   12 1265 44.29
13
28
661 Nail Them   10 895 42.64
8
12
665 String it out   17 1109 41.56
13
17
666 Con-Junctions   29 789 43.80
15
20
676 Sorting is not easy   7 512 39.34
23
34
677 A place for the brewery   203 27.27
681 Building the Tower   2 92 19.50
26
17
682 Pairs of Integers   196 25.56

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