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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   1 902 54.50
11
21
391 Railroads   88 17.40
17
17
392 Spin   43 26.23
1
17
393 Hexagon   77 48.65
17
1
394 Alphacode   580 22899 27.40
15
15
395 Anti-prime Sequences   3 347 47.77
9
9
396 Hit or Miss   133 43.23
1
1
397 I Conduit   3 196 15.57
21
21
398 Roll Playing Games   120 14.62
34
17
399 Team Rankings   1 391 53.58
17
9
400 To and Fro   90 23442 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   6 713 33.10
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   2 963 34.20
9
9
409 DEL Command   1 78 17.44
17
17
410 Variable Radix Huffman Encoding   1 180 19.26
1
1
411 Number of quite different words   4 243 33.86
17
27
412 K-path cover   186 20.48
1
50
413 Word Puzzles   4 377 18.26
30
14
414 Equatorial Bonfire   1 78 28.94
34
17
416 Divisibility by 15   5 1026 15.50
31
26
417 The lazy programmer   9 653 20.31
21
23
418 Necklace   45 16.96
419 Transposing is Fun   1 307 37.06
17
26
421 Another Road Problem   70 24.94
17
34
422 Transposing is Even More Fun   2 312 25.94
28
39
423 Assignments   244 4821 33.63
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   44 26.77
17
34
484 Fossil in the Ice   450 22.35
34
17
503 Prime Intervals   67 1816 16.10
21
19
515 Collatz   1 449 43.10
1
5
518 Zig-Zag Permutation   1 50 30.94
26
26
526 Divisors   38 1712 43.72
14
13
530 Divisors 2   10 933 52.48
12
16
598 Increasing Subsequences   147 34.50
34
34
660 Dungeon of Death   14 1355 42.81
13
26
661 Nail Them   13 971 42.99
10
15
665 String it out   22 1221 38.85
12
15
666 Con-Junctions   32 1002 40.89
14
19
676 Sorting is not easy   9 541 39.72
19
32
677 A place for the brewery   218 28.25
17
1

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