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list of classical problems


ID NAME QUALITY USERS ACC % DIFFICULTY C I
11515 I AM VERY BUSY   151 8256 45.27
9
11
370 Ones and zeros   149 4437 29.99
19
22
4033 Phone List   149 6784 31.31
16
14
4560 The Double HeLiX   146 8770 37.57
12
10
4141 Euler Totient Function   144 11407 38.39
8
11
39 Piggy-Bank   139 8061 35.45
14
16
7742 Onotole needs your help   138 10035 41.01
4
11
1435 Vertex Cover   128 4014 34.07
15
18
12323 Minimum Knight moves !!!   128 7638 42.22
15
11
3410 Feynman   120 33829 57.53
4
6
7299 Multiples of 3   120 3667 23.36
20
17
1419 A Game with Numbers   118 11947 61.64
3
10
9948 Will it ever stop   118 17695 43.12
4
9
913 Query on a tree II   115 4361 20.67
24
21
1710 Two Ends   115 3754 42.27
18
17
1684 Frequent values   111 3747 27.70
20
21
1030 Triple Fat Ladies   106 18997 51.76
4
12
2157 Anti-Blot System   104 12909 45.24
10
5
14956 Submerging Islands   104 4381 39.70
13
13
42 Adding Reversed Numbers   103 75752 48.42
6
4
7676 Sum of Digits   103 4745 38.57
17
20
7259 Light Switching   102 4240 32.70
16
15
25 Pouring water   99 5327 24.12
19
22
1845 Mice and Maze   99 5361 36.03
10
10
64 Permutations   98 4266 51.96
12
20
181 Scuba diver   98 3781 25.94
18
18
368 Cobbled streets   98 5374 50.75
13
12
38 Labyrinth   97 5278 25.74
17
16
2123 Candy I   95 28416 44.19
3
4
2416 Distinct Subsequences   94 3686 36.20
12
22
9655 Elevator Trouble   94 4146 32.07
11
11
63 Square Brackets   92 3834 56.90
14
18
2905 Not a Triangle   92 4959 38.61
11
11
3885 Coins Game   92 5132 46.08
10
13
6818 Capital City   92 2689 38.88
19
20
9493 Advanced Fruits   92 2220 37.47
19
16
694 Distinct Substrings   91 5483 26.35
21
24
7424 Girls and Boys   91 12212 46.95
4
10
400 To and Fro   89 23219 55.55
14
7
3643 Traffic Network   89 2088 18.30
18
21
7733 Happy Numbers I   89 9330 53.36
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 3533 65.96
14
18
7975 Tri graphs   86 4825 29.07
11
10
10380 prayatna PR   86 5217 43.38
6
6
7718 Number of common divisors   85 6726 25.03
11
13
10401 Aliens at the train   85 4350 29.25
13
10
1112 Number Steps   84 33667 43.24
4
4
10232 Distinct Primes   83 5771 45.50
10
9

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