24. Factorial Trailing Zeros
EasyMath
Print the number of trailing zeros in n!.
Input format
A single integer n.
Output format
The number of trailing zeros.
Example 1
Input
5
Output
1
Example 2
Input
0
Output
0
Constraints
0 ≤ n ≤ 10¹⁸
Read input from standard input and print the answer to standard output. Your code is judged against 5 test cases, most of them hidden.
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