The Factorial
You know the meaning of N! (N! = 1*2*...*(N-1)*N). You have to find the meaning of N.
Specifications
Input
There is a meaning of N! (1 ≤ N ≤ 2000) in the unique line.
Output
Write the meaning of the natural number N.
Problem information
Time Limit: 1 secondsMemory Limit: 64 MB
Balls for the passed test: 5
Complexity: 58% 197/471
Example
Example input5040 |
Example output7 |
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