요깨비's LAB

import java.util.HashMap; import java.util.Map; import java.util.Scanner; public class Main { public static void main(String[] args) { Scanner scr = new Scanner(System.in); int N = scr.nextInt(); Map nodes = new HashMap(); for (int i = 0; i < N; i++) { String id = String.valueOf((char) ('A' + i)); nodes.putIfAbsent(id, new Node(id)); } for (int i = 0; i < N; i++) { String rootId = scr.next(); St..