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list of classical problems


ID NAME QUALITY USERS ACC % DIFFICULTY C I
11515 I AM VERY BUSY   151 8279 45.20
9
11
370 Ones and zeros   149 4440 30.00
19
22
4033 Phone List   149 6798 31.33
16
14
4560 The Double HeLiX   146 8777 37.58
12
10
4141 Euler Totient Function   144 11421 38.42
8
11
39 Piggy-Bank   139 8069 35.44
14
16
7742 Onotole needs your help   138 10040 41.00
4
11
1435 Vertex Cover   128 4016 34.07
15
18
12323 Minimum Knight moves !!!   128 7658 42.25
15
11
3410 Feynman   120 33857 57.53
4
6
7299 Multiples of 3   120 3671 23.37
20
17
1419 A Game with Numbers   118 11950 61.62
3
10
9948 Will it ever stop   118 17698 43.12
4
9
913 Query on a tree II   115 4364 20.68
24
21
1710 Two Ends   115 3756 41.99
18
17
1684 Frequent values   111 3756 27.68
20
21
1030 Triple Fat Ladies   106 19007 51.74
4
12
2157 Anti-Blot System   104 12913 45.25
10
5
14956 Submerging Islands   104 4395 39.60
13
13
42 Adding Reversed Numbers   103 75864 48.42
6
4
7676 Sum of Digits   103 4751 38.57
17
20
7259 Light Switching   102 4274 32.81
16
15
25 Pouring water   100 5331 24.12
19
22
1845 Mice and Maze   99 5368 36.03
10
10
64 Permutations   98 4269 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 5282 25.76
17
16
2123 Candy I   95 28430 44.20
3
4
9655 Elevator Trouble   95 4152 32.09
11
11
2416 Distinct Subsequences   94 3688 36.21
12
22
2905 Not a Triangle   93 4976 38.64
11
11
63 Square Brackets   92 3834 56.89
14
18
3885 Coins Game   92 5140 46.09
10
13
6818 Capital City   92 2691 38.88
19
20
9493 Advanced Fruits   92 2222 37.49
19
16
694 Distinct Substrings   91 5492 26.37
21
24
7424 Girls and Boys   91 12215 46.94
4
10
400 To and Fro   89 23228 55.53
14
7
3643 Traffic Network   89 2088 18.30
18
21
7733 Happy Numbers I   89 9335 53.37
8
8
130 Rent your airplane and make money   88 3335 28.63
18
17
2884 Martian Mining   87 2267 47.79
13
22
5295 Adjacent Bit Counts   86 3539 65.91
14
18
7975 Tri graphs   86 4827 29.08
11
10
10380 prayatna PR   86 5220 43.37
6
6
7718 Number of common divisors   85 6729 25.02
11
13
10401 Aliens at the train   85 4356 29.25
13
10
1112 Number Steps   84 33685 43.24
4
4
10232 Distinct Primes   83 5782 45.49
10
9

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