package Programmers; import java.util.*; class Solution { public String solution(int n) { Stack stack = new Stack (); String answer = ""; while(n != 0) { int temp = n % 3; if(temp == 0) { temp = 4; n = n / 3 - 1; } else { n /= 3; } stack.push(temp); } while(!stack.isEmpty()){ answer+=stack.pop(); } return answer; } }