LintCode 2. 尾部的零

LintCode 2. 尾部的零

  • LintCode 2. 尾部的零
  • 设计一个算法,计算出 n 阶乘中尾部零的个数。

样例

  • 11! = 39916800,因此应该返回 2。

Java 代码

public class Solution {
    /*
     * @param n: An integer
     * @return: An integer, denote the number of trailing zeros in n!
     */
    public long trailingZeros(long n) {
        // write your code here, try to do it without arithmetic operators.
        long sum = 0;
        while (n > 0) {
            n = n / 5;
            sum = sum + n;
        }
        return sum;
    }
}

参考资料

原文地址:https://www.cnblogs.com/hgnulb/p/8979497.html