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list of classical problems


ID NAME QUALITY USERS ACC % DIFFICULTY C I
3749 Subset Sums   74 4082 26.39
17
20
66 Cross-country   38 4076 64.50
11
12
1435 Vertex Cover   128 4074 34.15
15
18
2713 Can you answer these queries IV   60 4007 17.39
21
21
6297 Decipher   -1 3990 44.68
8
6
1837 Pie   60 3941 30.30
18
15
3921 The Great Ball   60 3934 39.12
7
11
10442 Candy Distribution   22 3914 37.52
2
4
9722 Insertion Sort   28 3896 30.92
12
12
10798 Wachovia Bank   58 3863 46.93
7
9
1684 Frequent values   111 3857 27.62
20
21
63 Square Brackets   92 3855 56.74
14
18
11373 Coke madness   37 3848 34.97
5
8
181 Scuba diver   98 3822 25.98
18
18
18164 Atoms in the Lab   32 3821 25.76
8
5
1710 Two Ends   115 3768 41.98
18
17
30 Bytelandian Blingors Network   54 3749 39.16
14
10
705 New Distinct Substrings   41 3745 26.41
26
24
12448 How Many Games?   53 3736 22.37
14
12
2416 Distinct Subsequences   94 3724 36.28
12
22
8611 Non-Decreasing Digits   71 3720 54.78
7
11
5976 Traversing Grid   30 3710 58.49
6
10
339 Recursive Sequence   76 3703 50.27
20
17
7299 Multiples of 3   120 3703 23.44
20
17
5971 LCM Sum   81 3701 25.89
20
29
7185 Bye Bye Cakes   17 3660 38.63
8
7
5295 Adjacent Bit Counts   86 3641 64.91
14
18
29 Hash it!   14 3596 24.13
14
8
237 Sums in a Triangle   -13 3578 42.39
28
10
2149 Biased Standings   21 3562 33.39
5
5
4343 Empty Boxes   26 3562 66.00
2
13
6294 Yodaness Level   74 3542 49.25
15
16
3934 Recaman’s Sequence   25 3529 53.85
9
6
16 Sphere in a tetrahedron   12 3508 56.02
11
16
6694 D - Playing with Marbles   18 3494 66.68
3
5
4942 Integer Factorization (15 digits)   45 3486 32.36
11
11
5917 Factorial length   11 3464 34.51
5
17
10283 ALL IZZ WELL   69 3462 31.34
17
14
1029 Matrix Summation   53 3459 20.01
15
18
154 Sweet and Sour Rock   80 3420 51.26
14
17
48 Glass Beads   29 3414 37.90
15
18
11772 Negative Score   67 3407 34.21
10
11
10500 Haybale stacking   22 3387 33.87
10
14
130 Rent your airplane and make money   88 3350 28.60
18
17
17247 Digit Sum   49 3349 36.69
18
22
9199 Circular Track   30 3340 40.27
7
14
13753 Amazing Prime Sequence   61 3321 29.83
11
12
1161 Tic-Tac-Toe ( I )   20 3307 22.86
12
10
1811 Longest Common Substring   34 3250 21.81
20
18
11354 Amusing numbers   53 3245 59.86
13
15

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