326. Power of Three

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

An integer n is a power of three, if there exists an integer x such that n == 3x.

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

class Solution {
public:
    bool isPowerOfThree(int n) {
        return n > 0 and !((int)pow(3,19) % n);
    }
};