首页 > itarticle > leetcode 0367

leetcode 0367

admin 11月 13, 2020 0

Desicription

Given a positive integer num, write a function which returns True if num is a perfect square else False.

Note: Do not use any built-in library function such as sqrt.

Example 1:

1 2	Input: 16 Output: true

Example 2:

1 2	Input: 14 Output: false

class  {
public:
    bool isPerfectSquare(int num) {
        return int(pow(int(sqrt(num)), 2.0)) == num;
    }
};