https://oj.leetcode.com/problems/factorial-trailing-zeroes/
public class Solution {
public int trailingZeroes(int n) {
if (n <= 0)
return 0; // Invalid input.
// How many 5s, 25s, 125s ...
int base = 5;
int fives = 0;
do
{
fives += n / d;
base *= 5;
}
while (base <= n);
return fives;
}
}[LeetCode]172 Factorial Trailing Zeroes
原文：http://7371901.blog.51cto.com/7361901/1601319