【LeetCode】 91 x的平方根

题目：

解题思路：

https://leetcode-cn.com/problems/sqrtx/solution/x-de-ping-fang-gen-by-leetcode-solution/

代码：

class Solution {
    public int mySqrt(int x) {
        if (x == 0) {
            return 0;
        }
        int ans = (int) Math.exp(0.5 * Math.log(x));
        return (long) (ans + 1) * (ans + 1) <= x ? ans + 1 : ans;
    }
}

来源：oschina

链接：https://my.oschina.net/u/4248053/blog/4706969