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list of classical problems


ID NAME QUALITY USERS ACC % DIFFICULTY C I
11515 I AM VERY BUSY   153 8646 45.08
9
11
370 Ones and zeros   152 4522 30.11
19
21
4033 Phone List   151 7335 31.82
16
14
4141 Euler Totient Function   147 12033 39.03
8
11
4560 The Double HeLiX   147 8980 37.55
11
10
39 Piggy-Bank   140 8249 35.53
14
16
7742 Onotole needs your help   138 10152 41.10
4
11
12323 Minimum Knight moves !!!   133 8714 42.65
15
11
1435 Vertex Cover   129 4159 34.36
15
18
3410 Feynman   122 34528 57.48
4
6
7299 Multiples of 3   121 3781 23.63
20
17
9948 Will it ever stop   121 17946 43.01
4
9
913 Query on a tree II   118 4785 20.96
23
21
1419 A Game with Numbers   118 12077 61.48
3
10
1710 Two Ends   115 3789 41.58
18
17
1684 Frequent values   112 3997 27.66
20
21
14956 Submerging Islands   107 4719 39.68
13
14
1030 Triple Fat Ladies   106 19217 51.73
4
12
7676 Sum of Digits   106 5035 38.79
17
20
2157 Anti-Blot System   104 12967 45.24
10
5
42 Adding Reversed Numbers   103 88140 48.70
6
4
7259 Light Switching   102 4696 34.33
16
15
25 Pouring water   100 5581 24.42
19
22
1845 Mice and Maze   100 5569 35.93
10
10
181 Scuba diver   99 3911 26.08
18
18
2123 Candy I   99 29123 44.23
4
5
38 Labyrinth   98 5361 25.82
18
16
64 Permutations   98 4413 52.19
12
20
368 Cobbled streets   98 5441 50.87
13
12
9655 Elevator Trouble   96 4334 32.39
11
11
6818 Capital City   95 2966 39.53
20
20
2416 Distinct Subsequences   94 3783 36.34
12
22
2905 Not a Triangle   93 5052 38.67
11
11
9493 Advanced Fruits   93 2263 37.52
19
16
63 Square Brackets   92 3891 56.76
14
18
694 Distinct Substrings   92 5782 26.62
21
24
3885 Coins Game   92 5497 45.27
10
13
7424 Girls and Boys   91 12347 46.95
4
10
400 To and Fro   90 23448 55.58
14
7
2884 Martian Mining   89 2328 47.80
13
22
3643 Traffic Network   89 2120 18.30
18
21
7733 Happy Numbers I   89 9403 53.36
8
8
130 Rent your airplane and make money   88 3387 28.64
18
17
7718 Number of common divisors   87 7296 24.44
11
13
7975 Tri graphs   87 4871 29.13
11
10
5295 Adjacent Bit Counts   86 3776 63.98
14
18
10380 prayatna PR   86 5303 43.08
6
6
23776 K-Query Online   86 2058 40.13
20
23
10232 Distinct Primes   85 5932 45.48
10
9
10401 Aliens at the train   85 4481 29.28
13
10

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