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Power of 2
Basic Accuracy: 50.29% Submissions: 11455 Points: 1

Given a positive integer N. The task is to check if N is a power of 2. More formally, check if N can be expressed as 2x for some x.

Example 1:

Input: N = 1
Output: true
Explanation: 1 is equal to 2 raised to 0 (20 == 1).

Example 2:

Input: N = 98
Output: false
Explanation:
98 cannot be obtained by any power of 2.

Your Task: Your task is to complete the function isPowerofTwo() which takes n as a parameter and returns true or false by checking is given number can be represented as a power of two or not.

Expected Time Complexity: O(log N).
Expected Auxiliary Space: O(1).

Constraints:
0 <= N <= 1018