더보기문제 링크 https://school.programmers.co.kr/learn/courses/30/lessons/43164 import java.util.*;class Solution { //Set> set = new HashSet(); List> set = new ArrayList(); public String[] solution(String[][] tickets) { String[] answer = {}; List list = new ArrayList(); boolean[] visted = new boolean[tickets.length]; list.add("ICN"); dfs("ICN..