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list of classical problems


ID NAME QUALITY USERS ACC % DIFFICULTY C I
389 Use of Hospital Facilities   1 53 15.47
34
26
390 Billiard   1 903 54.53
11
21
391 Railroads   90 17.63
17
17
392 Spin   44 26.63
1
17
393 Hexagon   77 48.65
17
1
394 Alphacode   580 22970 27.42
15
15
395 Anti-prime Sequences   3 349 47.83
9
9
396 Hit or Miss   133 43.10
1
1
397 I Conduit   3 196 15.57
21
21
398 Roll Playing Games   121 14.67
34
17
399 Team Rankings   1 391 53.58
17
9
400 To and Fro   90 23447 55.60
14
7
401 Translations   137 38.07
17
34
402 Hike on a Graph   8 780 40.27
15
19
403 Sort fractions   6 714 33.12
9
21
404 Scanner   59 12.57
405 Tin Cutter   141 29.59
17
17
406 Logic   112 23.23
17
9
407 Random Number   48 29.13
17
17
408 Jill Rides Again   2 970 34.26
9
9
409 DEL Command   1 79 17.60
17
17
410 Variable Radix Huffman Encoding   1 180 19.26
1
1
411 Number of quite different words   4 244 33.93
17
27
412 K-path cover   186 20.48
1
50
413 Word Puzzles   4 377 18.26
30
14
414 Equatorial Bonfire   1 79 28.90
34
17
416 Divisibility by 15   5 1027 15.52
31
26
417 The lazy programmer   9 653 20.27
21
23
418 Necklace   47 17.18
419 Transposing is Fun   1 307 36.88
17
26
421 Another Road Problem   71 25.06
17
34
422 Transposing is Even More Fun   2 315 26.04
28
39
423 Assignments   244 4837 33.69
18
22
428 Particular Palindromes   5 501 32.20
22
24
449 Simple Numbers with Fractions Conversion   2 37 15.96
17
17
479 Permutation generator   1 135 28.24
21
17
481 Roots of polynomial   46 27.34
17
34
484 Fossil in the Ice   453 22.40
34
17
503 Prime Intervals   67 1826 16.14
21
19
515 Collatz   1 450 43.13
1
5
518 Zig-Zag Permutation   1 51 31.25
26
26
526 Divisors   38 1715 43.75
14
13
530 Divisors 2   10 936 52.47
12
16
598 Increasing Subsequences   148 34.62
34
34
660 Dungeon of Death   14 1355 42.80
13
26
661 Nail Them   13 971 42.98
10
15
665 String it out   22 1221 38.85
12
15
666 Con-Junctions   32 1006 40.93
14
19
676 Sorting is not easy   9 542 39.75
19
32
677 A place for the brewery   219 28.30
17
1

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