Leetcode——326. Power of Three

题目原址

https://leetcode.com/problems/power-of-three/description/

题目描述

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

解题思路

求一个数是否是3的幂指数，与题231.Power of Two解题思路一致

AC代码

    public boolean isPowerOfThree(int n) {
        if(n == 0)
            return false;
        if(n == 1)
            return true;

        while(n % 3 == 0) {
            n = n / 3;

            if(n == 1)
                return true;
        }
        return false;
    }