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list of classical problems


ID NAME QUALITY USERS ACC % DIFFICULTY C I
395 Anti-prime Sequences   2 341 49.39
9
9
396 Hit or Miss   130 42.86
1
1
397 I Conduit   3 192 15.42
21
21
398 Roll Playing Games   118 14.34
34
17
399 Team Rankings   1 385 53.19
17
9
400 To and Fro   90 23391 55.57
14
7
401 Translations   131 38.11
17
34
402 Hike on a Graph   8 770 40.23
15
19
403 Sort fractions   6 709 32.97
9
21
404 Scanner   56 12.24
405 Tin Cutter   134 33.72
17
17
406 Logic   107 22.51
17
9
407 Random Number   44 27.88
17
17
408 Jill Rides Again   2 947 34.19
9
9
409 DEL Command   1 73 16.80
17
17
410 Variable Radix Huffman Encoding   1 175 19.00
1
1
411 Number of quite different words   4 239 33.60
17
27
412 K-path cover   181 19.95
1
50
413 Word Puzzles   4 373 18.06
30
14
414 Equatorial Bonfire   1 73 27.93
34
17
416 Divisibility by 15   5 1020 15.46
31
26
417 The lazy programmer   9 648 20.17
21
23
418 Necklace   43 17.02
419 Transposing is Fun   1 298 36.76
17
26
421 Another Road Problem   68 24.26
17
34
422 Transposing is Even More Fun   2 303 26.08
28
39
423 Assignments   243 4762 33.56
18
22
428 Particular Palindromes   5 493 32.02
22
24
449 Simple Numbers with Fractions Conversion   2 34 16.80
17
17
479 Permutation generator   1 127 27.55
21
17
481 Roots of polynomial   37 24.80
17
34
484 Fossil in the Ice   436 22.08
34
17
503 Prime Intervals   66 1786 15.97
21
19
515 Collatz   1 445 42.98
1
5
518 Zig-Zag Permutation   1 43 31.38
26
26
526 Divisors   38 1704 43.61
14
13
530 Divisors 2   10 927 52.67
12
16
598 Increasing Subsequences   142 34.21
34
34
660 Dungeon of Death   14 1349 42.93
13
26
661 Nail Them   13 965 42.87
10
15
665 String it out   22 1217 38.77
12
15
666 Con-Junctions   32 994 40.73
14
19
676 Sorting is not easy   9 539 39.73
19
32
677 A place for the brewery   212 27.71
17
1
681 Building the Tower   2 100 19.86
17
12
682 Pairs of Integers   206 25.52
1
1
684 Another Assignment Problem   1 103 12.33
34
1
685 Partition the sequence   3 236 21.26
21
30
687 Repeats   2 964 25.32
30
38
688 Toy Cars   2 614 18.26
12
20

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