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list of classical problems


ID NAME QUALITY USERS ACC % DIFFICULTY C I
11515 I AM VERY BUSY   151 8262 45.24
9
11
370 Ones and zeros   149 4437 29.99
19
22
4033 Phone List   149 6789 31.33
16
14
4560 The Double HeLiX   146 8773 37.58
12
10
4141 Euler Totient Function   144 11416 38.41
8
11
39 Piggy-Bank   139 8064 35.44
14
16
7742 Onotole needs your help   138 10038 41.00
4
11
1435 Vertex Cover   128 4015 34.07
15
18
12323 Minimum Knight moves !!!   128 7645 42.23
15
11
3410 Feynman   120 33837 57.52
4
6
7299 Multiples of 3   120 3669 23.36
20
17
1419 A Game with Numbers   118 11948 61.63
3
10
9948 Will it ever stop   118 17696 43.12
4
9
913 Query on a tree II   115 4362 20.67
24
21
1710 Two Ends   115 3755 42.26
18
17
1684 Frequent values   111 3751 27.68
20
21
1030 Triple Fat Ladies   106 19005 51.75
4
12
2157 Anti-Blot System   104 12911 45.25
10
5
14956 Submerging Islands   104 4387 39.69
13
13
42 Adding Reversed Numbers   103 75804 48.42
6
4
7676 Sum of Digits   103 4747 38.59
17
20
7259 Light Switching   102 4251 32.73
16
15
25 Pouring water   99 5327 24.11
19
22
1845 Mice and Maze   99 5365 36.03
10
10
64 Permutations   98 4267 51.97
12
20
181 Scuba diver   98 3782 25.94
18
18
368 Cobbled streets   98 5375 50.76
13
12
38 Labyrinth   97 5279 25.75
17
16
2123 Candy I   95 28420 44.19
3
4
2416 Distinct Subsequences   94 3686 36.20
12
22
9655 Elevator Trouble   94 4148 32.09
11
11
63 Square Brackets   92 3834 56.89
14
18
2905 Not a Triangle   92 4974 38.64
11
11
3885 Coins Game   92 5136 46.07
10
13
6818 Capital City   92 2690 38.88
19
20
9493 Advanced Fruits   92 2221 37.48
19
16
694 Distinct Substrings   91 5486 26.35
21
24
7424 Girls and Boys   91 12213 46.96
4
10
400 To and Fro   89 23224 55.55
14
7
3643 Traffic Network   89 2088 18.30
18
21
7733 Happy Numbers I   89 9333 53.37
8
8
130 Rent your airplane and make money   88 3335 28.63
18
17
2884 Martian Mining   87 2266 47.78
13
22
5295 Adjacent Bit Counts   86 3536 65.96
14
18
7975 Tri graphs   86 4825 29.07
11
10
10380 prayatna PR   86 5218 43.37
6
6
7718 Number of common divisors   85 6726 25.03
11
13
10401 Aliens at the train   85 4352 29.26
13
10
1112 Number Steps   84 33670 43.24
4
4
10232 Distinct Primes   83 5775 45.49
10
9

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