hiho week 64 register

Ended

Participants:874

Verdict:Accepted
Score:100 / 100
Submitted:2015-09-21 09:38:50

Lang:Java

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/**
 * 
 */
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<IntegerList<Integer>> map = new HashMap<IntegerList<Integer>>();
        int i = 0;
        List<Integer> rootChild = new ArrayList<Integer>();
        while(i<k){
            int id = scanner.nextInt();
            if (id>0) {
                i++;
                rootChild.add(id);
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