import java.util.*;

class Solution {
    public int[] solution(int n) {
        List<Character> list = new ArrayList<>();
        
        for(int i = 2; i<=n; i++) {
            while(n%i==0) {
                if(!list.contains((char)(i+'0')))
                    list.add((char)(i+'0'));
                n = n/i;
            }
        }
        if(list.size() == 0) 
            list.add((char)(n+'0'));
        
        int[] answer = new int[list.size()];
        for (int i = 0; i < list.size(); i++){
            answer[i] = list.get(i) - '0';
        }
        return answer;
    }
}

//다른 사람의 풀이중 참조할 코드를 적는다.