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list of classical problems


ID NAME QUALITY USERS ACC % DIFFICULTY C I
9519 Distinct Submatrices   1 23 20.74
50
50
35988 Power Play   1 22 20.74
1
1
139 The Long and Narrow Maze   1 207 20.71
17
17
10091 Three-sided Dice   27 20.71
4069 Morphing is Fun   29 20.69
5104 Spam Detection   14 20.69
10087 Sensor Network   27 20.69
913 Query on a tree II   117 4485 20.69
23
21
12746 Colorful Circle (EASY)   5 463 20.68
28
23
228 Shamans   139 20.66
9
9
8795 Twenty Questions   1 40 20.65
11461 Book Shelves   2 72 20.65
17
17
3579 Disjoint Paths   4 312 20.65
24
27
88 Which is Next   1 129 20.64
34
34
20170 Coloring Segments   5 88 20.64
31
34
5972 Maximum Sum Sequences   14 1145 20.62
15
18
12407 Johnny The Gambler   7 952 20.62
8
6
28009 Balance the parentheses   17 20.59
13167 Totient in permutation (hard)   7 20.57
16030 Psycho   13 831 20.55
10
11
5150 Junk-Mail Filter   1 119 20.54
5902 Tri   1 77 20.54
34
50
215 Panic in the Plazas   83 20.53
34
34
8073 The area of the union of circles   1 444 20.53
38
30
348 Expedition   58 2215 20.51
20
20
27198 Ballons Revisited   4 94 20.51
1
23
9941 GRE Words   2 109 20.48
34
34
11273 Team Nim   2 82 20.48
9
26
21463 Arithmetic Rectangle   36 20.47
1466 Blue Mary Needs Help Again   5 207 20.44
30
34
33773 Ada and Dahlia   3 22 20.43
26
17
6296 Experiment   26 20.39
27520 Laser   5 38 20.37
17
17
729 Move your armies   78 20.32
1
1
3488 The Top-Code   1 55 20.32
17
34
8725 Closest Point Pair   30 1908 20.31
18
21
12866 Nlogonian Tickets   12 286 20.29
25
24
25482 Kimetto Kipsang and Kipchoge   1 40 20.29
34
34
11848 Power with Combinatorics   8 432 20.27
25
37
10440 Friends   32 20.25
9505 Distinct Subtrees   1 17 20.24
17
17
14387 Science   13 20.24
27261 Matrices with XOR property   8 63 20.24
20
24
17396 Dazzling Pearls   16 20.22
50
17
19274 Operators   17 589 20.19
14
20
2963 Painting Blocks (Act II)   1 55 20.19
17
34
25889 Drawing Lines   3 31 20.16
23
17
3110 Palindromic Number   3 94 20.15
9
17
37475 Base Exploration   5 82 20.14
9
12
34118 Prime Pesticide   6 23 20.13
37
34

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