Practice Valid Perfect Square
Read the task, work through the examples, and check your approach against the constraints. Use the original LeetCode task for coding and submissions.
Problem Statement
Given a positive integer num, return true if num is a perfect square or false otherwise. A perfect square is an integer that is the square of an integer. In other words, it is the product of some integer with itself. You must not use any built-in library function, such as sqrt.
Source: Valid Perfect Square on LeetCode. Use the original task for its coding environment and submissions.
Examples
# Example 1
Input
num = 16
Output
true
# Example 2
Input
num = 14
Output
false
Constraints
1 <= num <= 2^31 - 1
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