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list of classical problems (unsolved)


ID NAME QUALITY USERS ACC % DIFFICULTY C I
6949 PIN   145 28.30
17
34
11986 ROMAN NUMERALS   1 145 33.76
9
9
13090 New Strategy   3 145 33.53
9
9
21175 Rush hour   145 41.81
21642 Tsunami   3 145 40.88
28
23
24258 Fata7y Ya Warda!   14 145 34.30
20
17
31938 SLIS   2 145 39.39
34
34
228 Shamans   144 21.20
9
9
4587 Electric Fences   -1 144 33.33
26
26
8058 Soccer Teams   1 144 25.54
17
26
8421 Fun With Inequalities   144 37.89
17
17
12001 Bit by Bit   2 144 37.28
17
23
15430 Alice in Amsterdam, I mean Wonderland   3 144 23.57
17
23
27497 Binary Protean Number   6 144 45.38
11
16
34686 Meet Her Fast!   8 144 42.05
16
12
37 The Proper Key   1 143 13.99
17
17
3376 Parking Lot   1 143 20.40
17
17
5298 Interval Challenge   4 143 16.92
24
27
24772 Manipulate Dwarfs   5 143 30.95
20
20
26073 Counting Divisors   3 143 25.82
42
38
869 Galactic Import   3 142 45.76
5
5
2009 Cryptography   1 142 4.79
1
34
4194 Another Lucky Numbers   4 142 33.44
17
13
7934 Operating System Problems (Task Scheduling)   2 142 53.65
17
17
8129 Sky Lift   2 142 25.60
24
19
10464 Reverse Engineering   4 142 48.24
17
28
13545 Room Change   1 142 37.92
17
17
17877 Two Swamills   1 142 51.84
17
34
18966 Vacation Planning   3 142 25.94
17
17
405 Tin Cutter   141 29.59
17
17
699 Huge Knap Sack   1 141 25.06
9
9
9334 Point in tetrahedron   2 141 57.59
9
17
14542 Pythagorean triples (medium)   3 141 18.27
17
28
19142 BSTRING   4 141 33.82
17
13
19146 Glorious Gamblers   -1 141 55.52
23
26
21172 Erdos et al   3 141 36.84
26
26
4552 Adding up Triangles   140 35.23
7866 Regular expressions (Hard)   1 140 27.33
28
23
10644 Serve The Street   1 140 26.07
34
1
11564 E 23 Stairs pattern   1 140 39.70
17
23
25176 Compare Substring   4 140 44.06
9
9
26045 GCD OF MATRIX (hard)   4 140 28.31
42
29
25178 Elegant Permuted Sum   8 139 35.67
14
21
695 Unite Fast   1 138 27.81
9
9
4186 Break a New RSA system   1 138 34.12
6681 Point on the side of the rectangle   1 138 44.69
17
17
9547 Counting d-pairs   2 138 30.45
23
28
18468 A Pleasant Stroll   10 138 35.42
23
19
19270 SIR CHIRAG AND MAGIC NUMBERS   138 44.55
23515 The Last String Bender   9 138 27.65
19
11

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