leetcode-326-power of tree

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

给定一个整数，判断它是不是3的幂

简单的循环，判断最后是否得到1.

class Solution {
    public:
        bool isPowerOfThree(int n) {

            while(n>1)
                {
                    if(n%3>0) return false;
                    n/=3;
                }
            return n==1;
        }
};