172. Factorial Trailing Zeroes
172. Factorial Trailing Zeroes
Given an integer n, return the number of trailing zeroes in n!.
Example 1:
Input: 3
Output: 0
Explanation: 3! = 6, no trailing zero.
Example 2:
Input: 5
Output: 1
Explanation: 5! = 120, one trailing zero.
public int trailingZeroes(int n) {
if(n == 0) return 0;
return n / 5 + trailingZeroes(n / 5);
}