Valid Perfect Square
Updated Feb 24, 2026
Problem
Return true if num is a perfect square.
Constraints
1 <= num <= 2^31 - 1
Examples
Example 1
Input:
{"num": 16}
Output:
true
Function Signature
def isPerfectSquare(self, num: int) -> bool
How to Submit
Implement a Solution class with a isPerfectSquare method.
Your method will be called with the input parameters and should return the answer.