Lang:Java
Edit12345678910111213141516171819202122232425262728293031/****/import java.util.ArrayList;import java.util.Arrays;import java.util.HashMap;import java.util.List;import java.util.Map;import java.util.Scanner;/*** @author Lotay**/public class Main {/*** @param args*/public static void main(String[] args) {Scanner scanner = new Scanner(System.in);int N = scanner.nextInt();int k = scanner.nextInt();HashMap<Integer, List<Integer>> map = new HashMap<Integer, List<Integer>>();int i = 0;List<Integer> rootChild = new ArrayList<Integer>();while(i<k){int id = scanner.nextInt();if (id>0) {i++;rootChild.add(id);