Square Root X

public class Solution {
    public int mySqrt(int x) {
        if(x == 0) {
            return 0;
        }

        int left = 1;
        int right = x;

        while(left <= right) {
            int mid = left + (right - left) / 2;

            if(mid == x / mid) {
                return mid;
            } else if(mid > x / mid) {
                right = mid - 1;
            } else if(mid < x / mid) {
                left = mid + 1;
            }
        }

        return right;
    }
}