list of classical problems


ID NAME QUALITY USERS ACC % DIFFICULTY C I
389 Use of Hospital Facilities   1 52 14.86
34
26
390 Billiard   1 901 54.51
11
21
391 Railroads   88 17.40
17
17
392 Spin   43 26.23
1
17
393 Hexagon   76 48.63
17
1
394 Alphacode   580 22801 27.39
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 23424 55.58
14
7
401 Translations   136 38.05
17
34
402 Hike on a Graph   8 775 40.12
15
19
403 Sort fractions   6 710 33.00
9
21
404 Scanner   58 12.46
405 Tin Cutter   138 33.97
17
17
406 Logic   110 22.85
17
9
407 Random Number   46 28.51
17
17
408 Jill Rides Again   2 956 34.23
9
9
409 DEL Command   1 77 17.28
17
17
410 Variable Radix Huffman Encoding   1 178 19.15
1
1
411 Number of quite different words   4 242 33.80
17
27
412 K-path cover   184 20.04
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   44 16.85
419 Transposing is Fun   1 304 37.03
17
26
421 Another Road Problem   69 24.77
17
34
422 Transposing is Even More Fun   2 310 25.79
28
39
423 Assignments   244 4800 33.61
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   1 133 28.09
21
17
481 Roots of polynomial   43 26.59
17
34
484 Fossil in the Ice   445 22.25
34
17
503 Prime Intervals   66 1805 16.05
21
19
515 Collatz   1 448 43.06
1
5
518 Zig-Zag Permutation   1 47 29.82
26
26
526 Divisors   38 1707 43.69
14
13
530 Divisors 2   10 932 52.50
12
16
598 Increasing Subsequences   146 34.38
34
34
660 Dungeon of Death   14 1350 42.91
13
26
661 Nail Them   13 967 42.94
10
15
665 String it out   22 1219 38.82
12
15
666 Con-Junctions   32 1000 40.83
14
19
676 Sorting is not easy   9 540 39.69
19
32
677 A place for the brewery   217 28.18
17
1

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