Factorial
By Andrês Rodrigues Oliveira, UNICAMP 
Brazil
By Andrês Rodrigues Oliveira, UNICAMP Brazil
Your problem is quite simple: given a number N, find the number of zeros to the right of your factorial in base 10.
The input contains several test cases. Each test case contains an integer N (0 ≤ N ≤ 106).
For each test case, the output contains number of zeros from the factorial of N in base 10.
| Input Samples | Output Samples |
|
2 |
0 |
|
5 |
1 |
|
14 |
2 |