class Solution {
   public static void main(String[] args){
        Solution sl = new Solution();
        boolean result = sl.isPowerOfThree(27);
        System.out.println(result);
    }
    public boolean isPowerOfThree(int n) {
        if(n == 0){
            return false;
        }
        while(true){
            if(n == 1){
                return true;
            }else if(n % 3 == 0){
                n = n/3;
            }else{
                return false;
            }
        }
    }
}