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

Follow up:
Could you do it without using any loop / recursion?
*/

/**
 * @param {number} n
 * @return {boolean}
 */
var isPowerOfThree = function(n) {
    return n > 0 && Math.pow(3, Math.round(Math.log(n)/Math.log(3))) == n
};