LeetCode #326 Power of Three 三的次方

public class Solution {
    public bool IsPowerOfThree(int n) {
        if(n<0){
            return false;
        }

        double nn = n*1.0;
        while(nn>=3)
        {
            nn/=3;
        }
        return nn == 1.0;
    }
}

class Solution {
    public boolean isPowerOfThree(int n) {
        if(n<0){
            return false;
        }

        double nn = n*1.0;
        while(nn>=3)
        {
            nn/=3;
        }
        return nn == 1.0;
    }
}

class Solution:
    def isPowerOfThree(self, n: int) -> bool:
        if(n<0):
            return False

        while(n>=3):
            n=n/3

        return n == 1

/**
 * @param {number} n
 * @return {boolean}
 */
var isPowerOfThree = function(n) {
    if(n<0){
        return false;
    }

    while(n>=3)
    {
        n/=3;
    }
    return n == 1;
};