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list of classical problems


ID NAME QUALITY USERS ACC % DIFFICULTY C I
389 Use of Hospital Facilities   1 52 12.65
34
26
390 Billiard   2 900 54.48
13
17
391 Railroads   88 17.43
17
17
392 Spin   43 25.82
1
17
393 Hexagon   74 48.60
17
1
394 Alphacode   580 22744 27.37
15
15
395 Anti-prime Sequences   3 343 47.64
9
9
396 Hit or Miss   131 42.90
1
1
397 I Conduit   3 194 15.51
21
21
398 Roll Playing Games   120 14.62
34
17
399 Team Rankings   1 389 53.48
17
9
400 To and Fro   90 23417 55.59
14
7
401 Translations   135 37.92
17
34
402 Hike on a Graph   8 774 40.09
15
19
403 Sort fractions   6 710 33.00
9
21
404 Scanner   57 12.33
405 Tin Cutter   137 33.90
17
17
406 Logic   109 22.71
17
9
407 Random Number   44 27.75
17
17
408 Jill Rides Again   2 955 34.21
9
9
409 DEL Command   1 75 16.99
17
17
410 Variable Radix Huffman Encoding   1 178 19.15
1
1
411 Number of quite different words   4 241 33.76
17
27
412 K-path cover   182 19.93
1
50
413 Word Puzzles   4 375 18.10
30
14
414 Equatorial Bonfire   1 78 28.94
34
17
416 Divisibility by 15   5 1025 15.50
31
26
417 The lazy programmer   9 652 20.29
21
23
418 Necklace   43 16.74
419 Transposing is Fun   1 302 36.94
17
26
421 Another Road Problem   69 24.77
17
34
422 Transposing is Even More Fun   2 309 26.12
28
39
423 Assignments   244 4791 33.59
18
22
428 Particular Palindromes   5 498 32.15
22
24
449 Simple Numbers with Fractions Conversion   2 36 15.81
17
17
479 Permutation generator   1 130 27.87
21
17
481 Roots of polynomial   42 26.29
17
34
484 Fossil in the Ice   443 22.20
34
17
503 Prime Intervals   66 1800 16.03
21
19
515 Collatz   1 448 43.06
1
5
518 Zig-Zag Permutation   1 47 29.17
26
26
526 Divisors   38 1706 43.68
14
13
530 Divisors 2   10 932 52.50
12
16
598 Increasing Subsequences   144 34.39
34
34
660 Dungeon of Death   14 1349 42.90
13
26
661 Nail Them   13 967 42.94
10
15
665 String it out   22 1218 38.80
12
15
666 Con-Junctions   32 999 40.82
14
19
676 Sorting is not easy   9 540 39.72
19
32
677 A place for the brewery   215 28.02
17
1

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