g0301_0400.s0342_power_of_four.Solution

public class Solution extends Object

342 - Power of Four.

Easy

Given an integer n, return true if it is a power of four. Otherwise, return false.

An integer n is a power of four, if there exists an integer x such that n == 4^x.

Example 1:

Input: n = 16

Output: true

Example 2:

Input: n = 5

Output: false

Example 3:

Input: n = 1

Output: true

Constraints:

Follow up: Could you solve it without loops/recursion?

Class Solution

Constructor Summary