Backpacking

public class Main
{
	public static int main(String[] args) {

        String regex = "[s]";
		String valores [] = args[0].split(regex);
		
		int number1 = Integer.parseInt(valores[0]);
		int number2 = Integer.parseInt(valores[1]);
		
		int result = number1 + number2;
		
		return result;
	}
	
}

Test 1

Verdict: RUNTIME ERROR

Error: Main method must return a value of type void in class Main, please 
define the main method as:
   public static void main(String[] args)

Test 2

Verdict: RUNTIME ERROR

Error: Main method must return a value of type void in class Main, please 
define the main method as:
   public static void main(String[] args)

Test 3

Verdict: RUNTIME ERROR

Error: Main method must return a value of type void in class Main, please 
define the main method as:
   public static void main(String[] args)

Test 4

Verdict: RUNTIME ERROR

Error: Main method must return a value of type void in class Main, please 
define the main method as:
   public static void main(String[] args)