please i got "runtime error on test 11" with this code any help?? thanks in advance

import java.io.PrintWriter;
import java.util.Scanner;

public class GregAndGraph {
  int [][]graph;//pour stocker la matrice de graphe
  int []noeudSupp;//pour les noeuds supprimer 
  int []somme;//somme de plus court chemin
  int [][] data;
	public GregAndGraph() {
		//saisie
		Scanner in = new Scanner(System.in);
		PrintWriter out=new PrintWriter (System.out);
		int n=in.nextInt();
		graph=new int[n+1][n+1];
		data=new int[n+1][n+1];
		noeudSupp=new int[n+1];
		somme=new int[n+1];
		int []id=new int[30];
		for(int i=1;i<=n;i++){
			for(int j=1;j<=n;j++){
				graph[i][j]=in.nextInt();
				data[i][j]=graph[i][j];
			}
		}
		for(int i=1;i<=n;i++){
			noeudSupp[i]=in.nextInt();
			id[noeudSupp[i]]=i;
			somme[i]=0;
		}
		
		for (int k = 1; k <= n; k++) {
            for (int i = 1; i <= n; i++) {
                for (int j = 1; j <= n; j++) {
                    graph[i][j] = Math.min(graph[i][j], graph[i][noeudSupp[n-k+1]] + graph[noeudSupp[n-k+1]][j]);
                    
                    if (id[i] > n-k && id[j] > n-k) somme[k] += graph[i][j];
                }
            }
        }

        for (int k = n; k >= 1; k--) {
            System.out.print(somme[k] + " ");
        }
    }
	

	public static void main(String[] args) {
		new GregAndGraph();

	}

}

please i got "rutime error on test 1" with this code any help?? thanks in advance

package graph.party;

import java.util.ArrayList;
import java.util.Scanner;

public class Party2 {

	public Party2() {
		Scanner in = new Scanner(System.in);
		System.out.println("entrez le nombre des employés\n");
		int n = in.nextInt();
		ArrayList<Integer> tab=new ArrayList<Integer>(n);
		for(int i=0;i<n;i++){
			tab.add(in.nextInt());
		}
		int result=0;
		for(int j=0;j<n;j++){
			int temp=1;int var=tab.get(j);
			while(var != -1){var=tab.get(var-1);temp++;}
			if(temp>result) result=temp;
		}
		System.out.println(result);
	}

	public static void main(String[] args) {
		new Party2();

	}

}