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list of classical problems (unsolved)


ID NAME QUALITY USERS ACC % DIFFICULTY C I
131 Square dance   353 50.10
1
1
1708 Square Count   75 30.98
63 Square Brackets   92 3892 56.76
14
18
13114 SQL Queries   2 16 52.63
41790 Spy Reloaded   6 8.43
12804 Spy   1 6 12.24
50
50
14031 Spring Primality   22 19.08
10453 Spring Loaded   -2 160 31.30
17
34
8320 Spreadsheet scrolling   78 29.61
900 Split Windows   33 56.45
17
1
23539 Split   3 35 13.84
17
17
392 Spin   44 26.63
1
17
15609 Spiky Mazes   22 1056 35.12
15
12
12249 Spiderman vs Sandman   111 27.03
1
1
7335 Spheres   3 129 9.54
17
39
16 Sphere in a tetrahedron   12 3552 55.22
11
16
11900 Spelling Suggestion   8 12.86
4429 Spelling Lists   2 194 32.41
17
34
9387 Special String   11 1113 39.63
6
19
18829 Special Set   8 118 27.10
11
26
20926 Special Numbers (Reverse and Add)   1 21 11.94
26
26
9103 Special Numbers   8 759 30.05
14
16
13529 Special Graph   5 83 12.43
36
31
2531 Spatial Concepts Test   1 74 66.39
17
34
5104 Spam Detection   16 15.97
34314 Spaceships in Space   2 21 33.94
17
9
26958 Spaceship   2 34 43.36
21
17
3893 Space settlement   67 31.56
17789 Space Bridges   27 39.60
7739 Sound   12 485 33.86
20
17
10510 Sorting Machine   2 28 44.44
34
28
676 Sorting is not easy   9 542 39.75
19
32
229 Sorting is easy   1 118 18.11
17
1
27 Sorting Bank Accounts   53 8979 40.34
11
6
1182 Sorted bit squence   296 42.31
17
1
26706 Sort Machine   4 215 26.76
1
9
403 Sort fractions   6 714 33.12
9
21
3461 Song Contest   16 15.74
7973 Sometimes, a penalty is good!   5 1207 29.59
6
8
16686 Some Sums   3 26 28.37
34
26
32235 SOLVEIT   10 346 25.88
5
11
36667 Solution to all the problems   13 155 21.42
15
11
120 Solitaire   8 370 23.48
26
16
217 Soldiers on Parade   2 130 28.09
17
12
10334 SOLDIERS   7 755 28.51
8
8
25967 Social Network Community   31 1030 31.25
10
12
8058 Soccer Teams   1 144 25.54
17
26
850 Soccer Choreography   4 3.80
10571 Soccer Challenge   30 34.78
10574 Soccer Ceremony   26 40.43

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