Backpacking

public class test{

    public static void main( String args[]){
        int x1 = 0;
        String c = System.console().readLine();
        String[] arrS = c.split(" ");
        for (String x : arrS){
            int a = Integer.parseInt(x);
            x1 += a;
        }
        System.out.println(x1);
    }
}

Test 1

Verdict: RUNTIME ERROR

Exception in thread "main" java.lang.NullPointerException
	at test.main(test.java:6)

Test 2

Verdict: RUNTIME ERROR

Exception in thread "main" java.lang.NullPointerException
	at test.main(test.java:6)

Test 3

Verdict: RUNTIME ERROR

Exception in thread "main" java.lang.NullPointerException
	at test.main(test.java:6)

Test 4

Verdict: RUNTIME ERROR

Exception in thread "main" java.lang.NullPointerException
	at test.main(test.java:6)