[プログラマー]124カ国の数字

[問題の核心]:nアレイビット数を下げる

[最適な回答]

class Solution {
  public String solution(int n) {
      String[] numbers = {"4", "1", "2"};
      String answer = "";
      
      int num = n;
      
      while(num > 0){
          int remainder = num % 3;
          num /= 3;
          
          if(remainder == 0) num--; //0일 때, 자리수 내림
          
          answer = numbers[remainder] + answer;
      }
      
      return answer;
  }
}

[私の答え]

class Solution {
    public String solution(int n) {
        String answer = "";

        while (n > 0) {
            int remainder = n % 3;
 	
 			n /= 3;

            if (remainder == 0) n--;

            if(remainder == 0) {
            answer = "4" + answer;
            }

            if(remainder == 1) {
                answer = "1" + answer;
            }

            if(remainder == 2) {
                answer = "2" + answer;
            }
        }
        return answer;
    }
 }