내 코드 (틀림) import java.util.*; class Solution { public String solution(String[] participant, String[] completion) { String answer = ""; HashMap map = new HashMap(); for(int i=0; i < completion.length; i++) { int cnt = 1; if(map.containsKey(completion[i])) { cnt = map.get(completion[i]) + 1; } map.put(completion[i], cnt); } for(int i = 0; i < participant.length; i++) { if(!map.containsKey(particip..
