【leetcode刷题】T190-阶乘后的零

示例 1:
输入: 3
输出: 0
解释: 3! = 6, 尾数中没有零。

示例 2:
输入: 5
输出: 1
解释: 5! = 120, 尾数中有 1 个零.

class Solution(object):
    def trailingZeroes(self, n):
        """
        :type n: int
        :rtype: int
        """
        # 5的个数
        count = n
        res = 0
        while count > 0:
            count /= 5
            res += count
        return res

class Solution {
public:
    int trailingZeroes(int n) {
        int count = n, res = 0;
        while(count > 0){
            count /= 5;
            res += count;
        }
        return res;
    }
};