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list of classical problems (unsolved)


ID NAME QUALITY USERS ACC % DIFFICULTY C I
12183 Help the Commander in Chief   46 916 29.10
15
16
12323 Minimum Knight moves !!!   133 8719 42.65
15
11
1029 Matrix Summation   53 3561 20.15
15
18
11371 Answer the boss!   32 1242 35.24
15
15
2815 Increasing Subsequences   53 2184 28.16
15
22
394 Alphacode   580 22982 27.42
15
15
206 Bitmap   247 9660 28.29
15
16
381 106 miles to Chicago   50 3222 36.51
15
14
3605 Minimum Rotations   15 921 19.12
15
21
13990 Web islands   18 586 33.05
15
16
15560 Help the old King   15 554 37.22
15
15
22382 Euler Totient Function Depth   24 398 37.13
15
16
28305 Ada and Indexing   60 2362 43.00
15
15
1435 Vertex Cover   129 4159 34.36
15
18
17 The Bytelandian Cryptographer (Act I)   9 1391 41.45
15
26
96 Shopping   46 3100 44.19
15
11
1031 Up Subsequence   2 734 32.60
15
10
5084 Discrete Math Problem   6 287 31.66
15
24
5972 Maximum Sum Sequences   14 1160 20.64
15
18
6187 Jane and Tarzan   7 219 24.61
15
22
20977 Car Game   7 51 33.80
15
17
21284 Can You Make It Empty 3   6 95 31.16
15
20
27225 Knight Move   12 466 30.10
15
14
27248 Funny Modular Sequence   7 84 35.36
15
20
28303 Ada and Plants   14 325 33.81
15
16
34484 Candy pair   7 64 42.15
15
22
37169 Boba Inversion   10 108 33.41
15
20
8869 Roti Prata   63 7451 39.46
15
17
14932 Lowest Common Ancestor   234 7944 29.25
15
15
78 Marbles   68 8231 34.99
15
13
15609 Spiky Mazes   22 1056 35.12
15
12
28304 Ada and Teams   24 890 39.52
15
15
18467 A Brief Expedition   11 277 54.42
15
15
21692 CURD PRODUCERS   6 535 42.01
15
11
9921 ABC Path   162 7893 21.88
15
12
7691 Homo or Hetero   22 1676 36.26
15
11
14955 Dancing Cows   24 597 24.92
15
22
2 Prime Generator   630 83199 16.31
15
14
402 Hike on a Graph   8 781 40.27
15
19
744 Longest Permutation   3 619 19.85
15
19
1285 Continuous Fractions Again   5 376 41.86
15
10
3105 Power Modulo Inverted   6 1155 27.55
15
23
3974 Another Tree Problem   7 647 32.53
15
23
4988 Madrids One Way Streets   5 201 29.00
15
15
13686 finding maximum possible number   8 369 22.08
15
27
14156 Movie Theatre Madness   8 446 53.30
15
17
23507 Retrovirus   6 94 36.11
15
13
24999 1807   10 529 38.42
15
18
35151 Beautiful Roll Numbers   8 75 65.19
15
8
36667 Solution to all the problems   13 155 21.42
15
11

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