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list of classical problems (unsolved)


ID NAME QUALITY USERS ACC % DIFFICULTY C I
23507 Retrovirus   6 94 36.11
15
13
3582 Restaurant Tab   24 21.90
11117 Restacking haybales 2012   257 59.64
10449 Resource Management   15 18.00
11906 Rescue On Time   -1 26 33.00
34
17
8982 Representatives   20 442 31.50
17
16
687 Repeats   2 982 25.39
30
38
9751 Repairing Roads   1 21 11.02
17
34
4410 Repair the Door   62 22.96
7402 Repair Depots   14 43.90
3936 Repair City Hall   4 248 50.82
5
1
130 Rent your airplane and make money   88 3387 28.64
18
17
704 Remove The String   13 663 15.28
19
27
10114 Remoteland   3 135 56.00
34
28
3865 Reljef   3 94 39.09
26
17
1707 Reliable Nets   4 342 31.51
28
23
220 Relevant Phrases of Annihilation   699 23.26
26
26
70 Relations   2 254 28.80
9
17
26344 Related or not   9 369 52.35
8
9
14944 Reindeer Games   2 116 22.00
17
17
7866 Regular expressions (Hard)   1 140 27.33
28
23
10113 Regular Convex Polygon   101 30.40
8056 Regex Edit Distance   2 36 43.00
34
42
36226 Reduce the array   15 798 30.12
4
6
21525 Red John is Back   5 318 53.38
6
17
11712 Red Cross Hospital   1 21 25.22
34
1
25001 Red Blue Line Segments   2 320 19.51
28
26
8317 Red Balls   47 44.77
12363 Red And Green   7 257 40.14
8
14
11386 Recycled Numbers   1 198 31.86
12807 Recursive Sequence (Version X)   12 16.28
37226 Recursive Sequence (Version III)   4 11 18.31
34
34
2699 Recursive Sequence (Version II)   16 1013 26.12
26
24
339 Recursive Sequence   79 3840 50.29
20
17
37422 Recurrence Power Sum   4 29 19.25
45
46
5294 Recurrence   2 262 14.44
28
17
2056 Rectangular Polygon   1 136 48.14
1
17
3878 Rectangles Perimeter   58 2702 49.87
12
14
8285 Rectangles in a Matrix   2 7 17.11
17
34
3890 Rectangles Counting   175 33.61
188 Rectangles   2 187 12.83
17
23
1960 Rectangles   4 174 16.62
34
28
4300 Rectangles   176 27068 49.75
5
8
2038 Rectangle Tiling   2 116 41.61
1
1
8423 Recover Polynomials   58 49.68
3934 Recaman’s Sequence   25 3537 53.88
9
6
2058 Reaux! Sham! Beaux!   4 664 32.90
23
6
6985 Rearranging Digits   56 22.53
18174 REAL ROOTS   15 1287 60.04
6
12
16267 Real Numbers   2 172 17.97
26
26

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