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list of classical problems


ID NAME QUALITY USERS ACC % DIFFICULTY C I
10091 Three-sided Dice   27 20.71
913 Query on a tree II   117 4397 20.70
24
21
5104 Spam Detection   14 20.69
12746 Colorful Circle (EASY)   5 463 20.68
28
23
3579 Disjoint Paths   4 311 20.67
24
27
33372 Lannister Army   12 342 20.67
19
29
228 Shamans   139 20.66
9
9
8795 Twenty Questions   1 40 20.65
31 Fast Multiplication   48 8659 20.65
15
12
3544 Binary Search Tree   6 587 20.63
11
20
5972 Maximum Sum Sequences   14 1142 20.62
15
18
1466 Blue Mary Needs Help Again   4 202 20.61
28
34
11461 Book Shelves   2 71 20.61
17
17
12407 Johnny The Gambler   7 951 20.61
8
6
28009 Balance the parentheses   17 20.59
16030 Psycho   13 823 20.58
10
11
13167 Totient in permutation (hard)   7 20.57
9941 GRE Words   2 104 20.53
34
34
348 Expedition   58 2196 20.43
20
20
8073 The area of the union of circles   1 439 20.43
38
30
33773 Ada and Dahlia   3 22 20.43
26
17
25784 Bubble Sort   10 628 20.40
16
17
6296 Experiment   26 20.39
11579 Two Famous Companies   2 195 20.39
9
17
215 Panic in the Plazas   82 20.39
34
34
27520 Laser   5 38 20.37
17
17
34975 Prime Friendly Numbers   10 39 20.32
28
26
3488 The Top-Code   1 55 20.32
17
34
19274 Operators   17 587 20.31
14
20
37475 Base Exploration   5 81 20.31
9
12
27261 Matrices with XOR property   8 63 20.29
20
24
20170 Coloring Segments   4 86 20.27
30
34
11848 Power with Combinatorics   8 431 20.26
25
37
10440 Friends   32 20.25
5902 Tri   1 77 20.25
34
50
9505 Distinct Subtrees   1 17 20.24
17
17
14387 Science   13 20.24
17396 Dazzling Pearls   16 20.22
50
17
8725 Closest Point Pair   31 1853 20.22
19
21
27198 Ballons Revisited   4 92 20.22
1
23
30826 Bernoulli numbers   4 7 20.21
23
12
25214 Ohani And The Game   77 20.19
11
8
12866 Nlogonian Tickets   12 266 20.19
25
24
2963 Painting Blocks (Act II)   1 55 20.19
17
34
25889 Drawing Lines   3 31 20.16
23
17
21572 Marble & store   3 120 20.15
17
15
3110 Palindromic Number   3 94 20.15
9
17
19037 Magical colorful cats (easy)   20 20.10
417 The lazy programmer   9 645 20.09
21
23
25482 Kimetto Kipsang and Kipchoge   1 39 20.07
34
34

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