Help me ( arith2 )

[cesar_bianco_sof]

NZEC Error on ARITH2

//package spoj;

import java.util.Scanner;

/*public */class ARITH2 {

public static void main(String[] args) {
	long casos = 0;
	String ecuacion = "";
	
	Scanner s = new Scanner(System.in);
	casos = s.nextInt();
	while(casos--!=-1){
		ecuacion = s.nextLine();
		
		if(!ecuacion.isEmpty()){
			String partes[] = ecuacion.split(" * ");
			
			long total = Long.parseLong(partes[0]);
			
			for(long i = 0; i < partes.length; ++i){
				if(partes[(int)i].equalsIgnoreCase("*")){
					total *= Long.parseLong(partes[(int)i+1]);
				}
				
				if(partes[(int)i].equalsIgnoreCase("+")){
					total += Long.parseLong(partes[(int)i+1]);
				}
				
				if(partes[(int)i].equalsIgnoreCase("/")){
					total /= (int)Long.parseLong(partes[(int)i+1]);
				}
			}
			System.out.println(total);
		}
	}
}

}

on my computer runs perfectly. but when I submit it says error in spoj NZEC me ..! which means that error

[davidfashion]

NZEC Error on ARITH2

// Code removed.

on my computer runs perfectly. but when I submit it says error in spoj NZEC me ..! which means that error

The problem statement states "It may also contain spaces to improve readability." Since the problem may contain spaces, it may also not contain spaces. However, your program assumes that spaces are required. For example, the input:

1
1+1=

produces a NumberFormatException.