Super Pow

# Tag: #powerofn

## Leetcode: Pow(x, n)

## Leetcode: Power of Two

Given an integer, write a function to determine if it is a power of two.

## Leetcode: Power of Three

Given an integer, write a function to determine if it is a power of three.

## Leetcode: Power of Four

Given an integer (signed 32 bits), write a function to check whether it is a power of 4.