public class Solution { public int TrailingZeroes(int n) { if (n == 0) { return 0; } else { var x = n / 5; var y = TrailingZeroes(x); return x + y; } } }
https://leetcode.com/problems/factorial-trailing-zeroes/#/description
原文：http://www.cnblogs.com/asenyang/p/6747128.html