Given a non-negative integer n, return true if n is a perfect square. A perfect square is an integer that is the product of some non-negative integer multiplied by itself. For example, 16 is a perfect square because 4 * 4 = 16. Return false for negative numbers.
Examples:
Input: n = 16
Output: true
Explanation: 4 * 4 = 16
Input: n = 25
Output: true
Explanation: 5 * 5 = 25
Input: n = 14
Output: false
Explanation: No integer squared equals 14
Input: n = 0
Output: true
Explanation: 0 * 0 = 0
Input: n = 100
Output: true
Explanation: 10 * 10 = 100
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