[JAVA Lv.1] 완주하지 못한 선수

import java.util.*;
 
class Solution {
    public String solution(String[] participant, String[] completion) {
        String answer = "";
 
        Arrays.sort(participant);
        Arrays.sort(completion);
 
        int i;
        for (i = 0; i < completion.length; i++) {
            if (!participant[i].equals(completion[i]))
                break;
        }        
        return participant[i];
    }
}