675. Problem z Java

[kb91]

Witam,
prosibym o pomoc aby wskazac mi co robie zle w kodzie Java skoro zwraca mi blad:
Blad wykonania (NZEC)

KOD:

package posz;

import java.io.IOException;
import java.util.Scanner;

public class Main {

/**
 * @param args the command line arguments
 * @throws java.lang.Exception
 */


public static void main(String[] args)throws java.lang.Exception {
    // TODO code application logic here
    try{
        Scanner in = new Scanner(System.in);
        short i;
        int j;
        short D = (short) in.nextInt();
        DataSet[] allData = new DataSet[D];

        for(i=0;i<D;i++)
        {
          allData[i]= new DataSet();
          int N =  in.nextInt();
          for(j=0;j<N;j++)
          {
              short dir=(short) in.nextInt();
              short steps = (short) in.nextInt();
              allData[i].addStep(dir,steps); 

          }
        }
        for(i=0;i<D;i++)
        {
           allData[i].printRoute();
        }
        System.gc();
        
    }catch (Exception e) 
    {
        return;
    }
    
}

}

class DataSet
{
long NS=0;
long EW=0;

public DataSet()
{
this.NS=0;
this.EW=0;
}

public void addStep(short dir, short steps)
{
switch(dir)
{
case 0:
this.NS+=(long) steps;
break;
case 1:
this.NS-=(long) steps;
break;
case 2:
this.EW-=(long) steps;
break;
case 3:
this.EW+=(long) steps;
break;
}
}
public void printRoute()
{
if(this.NS==0 && this.EW==0)
{
System.out.println("studnia");
}else{
String message="";
if(this.NS>0) message+="0 " + String.valueOf(this.NS) ;
if (this.NS<0) message+="1 " + String.valueOf(Math.abs(this.NS)) ;
System.out.println(message);
message="";
if(this.EW>0) message+="3 " + String.valueOf(this.EW) ;
if (this.EW<0) message+="2 " + String.valueOf(Math.abs(this.EW)) ;
System.out.println(message);
}

}

}