list of classical problems


ID NAME QUALITY USERS ACC % DIFFICULTY C I
66 Cross-country   38 4049 64.54
11
12
1435 Vertex Cover   128 4008 34.06
15
18
3749 Subset Sums   73 3987 26.27
17
20
6297 Decipher   -1 3973 44.66
8
6
3921 The Great Ball   60 3921 39.08
7
11
10442 Candy Distribution   22 3908 37.51
2
4
63 Square Brackets   92 3832 56.93
14
18
18164 Atoms in the Lab   32 3792 25.75
8
5
10798 Wachovia Bank   58 3791 46.92
7
9
11373 Coke madness   37 3790 34.86
5
8
181 Scuba diver   98 3774 25.94
18
18
1837 Pie   60 3773 30.41
18
15
9722 Insertion Sort   28 3773 30.75
12
12
1710 Two Ends   115 3752 42.26
18
17
1684 Frequent values   111 3732 27.69
20
21
12448 How Many Games?   54 3715 22.46
14
12
8611 Non-Decreasing Digits   71 3712 54.79
7
11
30 Bytelandian Blingors Network   54 3705 39.00
14
10
5976 Traversing Grid   30 3703 58.48
6
10
2416 Distinct Subsequences   93 3685 36.19
12
22
7299 Multiples of 3   120 3659 23.34
20
17
7185 Bye Bye Cakes   17 3653 38.59
8
7
705 New Distinct Substrings   41 3642 26.14
26
24
2713 Can you answer these queries IV   59 3607 16.88
21
21
339 Recursive Sequence   74 3594 50.06
20
17
237 Sums in a Triangle   -13 3566 42.38
28
10
4343 Empty Boxes   26 3542 66.11
2
13
29 Hash it!   14 3530 24.17
14
8
5295 Adjacent Bit Counts   86 3526 66.05
14
18
3934 Recaman’s Sequence   25 3525 53.89
9
6
6294 Yodaness Level   74 3512 49.20
15
16
6694 D - Playing with Marbles   18 3491 66.82
3
5
5971 LCM Sum   80 3482 25.63
20
29
16 Sphere in a tetrahedron   12 3475 56.63
11
16
5917 Factorial length   11 3462 34.54
5
17
2149 Biased Standings   21 3458 33.24
5
5
10283 ALL IZZ WELL   69 3411 31.23
17
14
1029 Matrix Summation   52 3408 19.99
15
18
154 Sweet and Sour Rock   78 3389 51.35
14
17
11772 Negative Score   67 3364 34.32
10
11
4942 Integer Factorization (15 digits)   45 3353 32.27
11
11
48 Glass Beads   27 3345 37.77
15
17
9199 Circular Track   30 3336 40.27
7
14
130 Rent your airplane and make money   88 3332 28.62
18
17
13753 Amazing Prime Sequence   61 3299 29.75
11
12
11354 Amusing numbers   52 3230 59.87
13
15
15555 Check the coprimeness   23 3223 50.24
3
5
1161 Tic-Tac-Toe ( I )   20 3206 22.87
12
10
41 Play on Words   42 3197 19.38
21
24
2412 Arranging Amplifiers   18 3197 27.30
7
16

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