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list of classical problems


ID NAME QUALITY USERS ACC % DIFFICULTY C I
66 Cross-country   38 4059 64.54
11
12
1435 Vertex Cover   128 4022 34.09
15
18
3749 Subset Sums   73 4007 26.29
17
20
6297 Decipher   -1 3976 44.65
8
6
3921 The Great Ball   60 3924 39.09
7
11
10442 Candy Distribution   22 3911 37.53
2
4
63 Square Brackets   92 3838 56.87
14
18
9722 Insertion Sort   28 3825 30.68
12
12
10798 Wachovia Bank   58 3810 46.85
7
9
1837 Pie   60 3807 30.38
18
15
11373 Coke madness   37 3803 34.88
5
8
18164 Atoms in the Lab   32 3799 25.74
8
5
181 Scuba diver   98 3786 25.94
18
18
1684 Frequent values   111 3769 27.68
20
21
1710 Two Ends   115 3756 41.99
18
17
12448 How Many Games?   53 3727 22.43
14
12
30 Bytelandian Blingors Network   54 3718 39.05
14
10
8611 Non-Decreasing Digits   71 3715 54.78
7
11
5976 Traversing Grid   30 3704 58.48
6
10
2416 Distinct Subsequences   94 3689 36.21
12
22
2713 Can you answer these queries IV   60 3679 16.99
21
21
7299 Multiples of 3   120 3674 23.37
20
17
705 New Distinct Substrings   41 3670 26.23
26
24
7185 Bye Bye Cakes   17 3655 38.60
8
7
339 Recursive Sequence   75 3626 50.09
20
17
29 Hash it!   14 3575 24.20
14
8
237 Sums in a Triangle   -13 3568 42.39
28
10
4343 Empty Boxes   26 3548 66.08
2
13
5295 Adjacent Bit Counts   86 3544 65.92
14
18
5971 LCM Sum   81 3536 25.76
20
29
3934 Recaman’s Sequence   25 3526 53.89
9
6
6294 Yodaness Level   74 3519 49.23
15
16
6694 D - Playing with Marbles   18 3493 66.80
3
5
2149 Biased Standings   21 3481 33.28
5
5
16 Sphere in a tetrahedron   12 3479 56.49
11
16
5917 Factorial length   11 3462 34.54
5
17
10283 ALL IZZ WELL   69 3431 31.27
17
14
1029 Matrix Summation   52 3417 20.00
15
18
154 Sweet and Sour Rock   79 3402 51.42
14
17
11772 Negative Score   67 3374 34.31
10
11
4942 Integer Factorization (15 digits)   45 3372 32.30
11
11
48 Glass Beads   28 3358 37.81
15
18
130 Rent your airplane and make money   88 3338 28.60
18
17
9199 Circular Track   30 3336 40.26
7
14
13753 Amazing Prime Sequence   61 3303 29.76
11
12
1161 Tic-Tac-Toe ( I )   20 3242 22.89
12
10
11354 Amusing numbers   52 3232 59.86
13
15
15555 Check the coprimeness   23 3225 50.26
3
5
41 Play on Words   42 3206 19.39
21
24
2412 Arranging Amplifiers   18 3206 27.31
7
16

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