This is my java code for input:
        Scanner cin = new Scanner(System.in);
        int n = 0;
        try {
            //String line = stdin.readLine().trim();

            n = cin.nextInt();

            for (int i = 1; i <= n; i++) {

                //line = stdin.readLine().trim();
                a[i] = cin.nextInt();
            }

            //line = stdin.readLine().trim();

            int m = cin.nextInt();

            b = new int[m + 1];
            b[0] = -5000000;

            for (int i = 1; i <= m; i++) {
              //  line = stdin.readLine().trim();
                b[i] = cin.nextInt();
            }
        } catch (Exception e) {
            while (true) {
            }
        }

  
What is wrong?