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list of classical problems


ID NAME QUALITY USERS ACC % DIFFICULTY C I
4033 Phone List   151 6934 31.50
16
14
11515 I AM VERY BUSY   151 8341 45.24
9
11
370 Ones and zeros   149 4456 30.04
19
22
4560 The Double HeLiX   147 8809 37.58
12
10
4141 Euler Totient Function   144 11521 38.50
8
11
39 Piggy-Bank   140 8099 35.44
14
16
7742 Onotole needs your help   138 10069 41.02
4
11
12323 Minimum Knight moves !!!   130 7854 42.23
15
11
1435 Vertex Cover   128 4035 34.08
15
18
3410 Feynman   122 34014 57.51
4
6
7299 Multiples of 3   120 3683 23.41
20
17
9948 Will it ever stop   119 17764 43.08
4
9
1419 A Game with Numbers   118 11986 61.60
3
10
913 Query on a tree II   116 4426 20.70
23
21
1710 Two Ends   115 3757 41.97
18
17
1684 Frequent values   111 3796 27.52
20
21
1030 Triple Fat Ladies   106 19078 51.75
4
12
2157 Anti-Blot System   104 12924 45.25
10
5
7676 Sum of Digits   104 4789 38.53
17
20
14956 Submerging Islands   104 4467 39.67
13
13
42 Adding Reversed Numbers   103 76960 48.36
6
4
7259 Light Switching   102 4344 33.05
16
15
25 Pouring water   100 5383 24.21
19
22
1845 Mice and Maze   99 5404 36.01
10
10
64 Permutations   98 4301 51.94
12
20
181 Scuba diver   98 3796 25.93
18
18
368 Cobbled streets   98 5384 50.79
13
12
38 Labyrinth   97 5294 25.76
17
16
2123 Candy I   97 28551 44.25
4
5
9655 Elevator Trouble   96 4177 32.26
11
11
2416 Distinct Subsequences   94 3705 36.23
12
22
2905 Not a Triangle   93 4984 38.62
11
11
63 Square Brackets   92 3844 56.86
14
18
3885 Coins Game   92 5216 45.91
10
13
6818 Capital City   92 2742 39.02
19
20
9493 Advanced Fruits   92 2231 37.41
19
16
694 Distinct Substrings   91 5541 26.39
21
24
7424 Girls and Boys   91 12254 46.92
4
10
400 To and Fro   90 23292 55.53
14
7
3643 Traffic Network   89 2094 18.29
18
21
7733 Happy Numbers I   89 9357 53.37
8
8
130 Rent your airplane and make money   88 3340 28.58
18
17
2884 Martian Mining   87 2276 47.80
13
22
7975 Tri graphs   87 4836 29.09
11
10
5295 Adjacent Bit Counts   86 3590 65.55
14
18
7718 Number of common divisors   86 6834 25.01
12
13
10380 prayatna PR   86 5233 43.31
6
6
10401 Aliens at the train   85 4377 29.21
13
10
1112 Number Steps   84 33806 43.21
4
4
10232 Distinct Primes   84 5805 45.48
10
9

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