Given an integer (signed 32 bits), write a function to check whether it is a power of 4.
Example 1:
Input: 16 Output: true
Example 2:
Input: 5 Output: false
Follow up: Could you solve it without loops/recursion?
Given an integer (signed 32 bits), write a function to check whether it is a power of 4.
Example 1:
Input: 16 Output: true
Example 2:
Input: 5 Output: false
Follow up: Could you solve it without loops/recursion?