'''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:
Input: 16
Output: true

Example 2:
Input: 14
Output: false'''
class Solution:
    def isPerfectSquare(self, n: int) -> bool:
        i = 1
        while(i * i<= n): 
            if ((n % i == 0) and (n / i == i)): 
                return True
            i = i + 1
        return False
            
