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list of classical problems (unsolved)


ID NAME QUALITY USERS ACC % DIFFICULTY C I
10416 Van Helsings gun   3 1445 54.45
6
15
11516 VALIDATE THE MAZE   64 3184 32.23
11
8
22560 Valid Path   6 67 35.74
6
8
35381 VALENTINE   2 42 27.50
11
14
15438 Valences   11 1281 41.62
4
7
18966 Vacation Planning   3 142 25.94
17
17
389 Use of Hospital Facilities   1 53 15.47
34
26
1440 Use of Function Arctan   4 543 29.24
5
26
28653 Urinals   5 13 11.89
26
17
31970 Urdhva - Tiryag Bhyam   -6 86 31.10
1
1
7859 Upper Right King (Hard)   3 171 37.39
26
34
16487 Update the array !   165 5027 38.77
9
14
15914 Update Sub-Matrix & Query Sub-Matrix   2 96 35.79
23
28
1031 Up Subsequence   2 734 32.60
15
10
2940 Untitled Problem II   126 15.45
34
2709 Untitled Problem   30 16.67
9517 Unlock the Cellphone   12 23.64
11440 Unlock it ! Part 2   48 22.88
10809 Unlock it !   86 30.27
31502 University Homework   5 56 29.11
20
6
9690 Universal Question Answering System   26 24.00
695 Unite Fast   1 138 27.81
9
9
10608 Unique Strings   3 71 48.70
26
26
38602 Unique Sequence   8 73 46.49
8
12
10814 Unique Paths   130 46.01
27379 Unique Code   22 130 19.74
21
21
14862 Union Laser   3 31 47.34
23
17
21643 Unhappy Numbers   7 53 37.91
31
31
15649 Unequalled Consumption   1 14 23.53
17
34
21049 Under Construction Forever   1 17 40.91
17
34
2271 Undecodable Codes   48 12.27
1002 Uncle Jack   13 2970 39.60
9
8
3314 Umnozak   115 30.02
42
17
41044 UkÅ‚adanie kart - Card stacking   1 32 42.86
17
17
7861 UFO   1 41 30.21
17
17
3249 Typesettin   2 36 46.67
1
1
4378 Twofive   66 26.45
17877 Two Swamills   1 142 51.84
17
34
36413 Two Sum Query   4 66 34.07
17
23
30499 TWO STRINGS   6 26 28.75
15
15
91 Two squares or not two squares   79 6097 24.70
11
14
26350 TWO SEQUENCES PROBLEM   12 271 31.69
10
15
4070 Two Professors   104 14.10
6717 Two Paths   9 231 17.81
34
36
17559 Two Game   5 327 37.27
1
39
11579 Two Famous Companies   3 235 22.02
23
28
1710 Two Ends   115 3790 41.56
18
17
6831 Two Ball Game   67 28.44
6377 Two Array Problem   4 189 28.02
17
26
5115 Two "Ways"   67 15.62

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