문제https://www.acmicpc.net/problem/1939풀이(20분)import java.io.*;import java.util.*;public class Main { static int[] parent; public static void main(String[] args) throws IOException { BufferedReader br = new BufferedReader(new InputStreamReader(System.in)); StringTokenizer st; st = new StringTokenizer(br.readLine()); int n = Integer.parseInt(st.nextToken()); // 도시..