public static void main (String [] args) {
        String a = "123456789";
        String v = "234567890";
        char [] aa  = a.toCharArray();
        char[] vv = v.toCharArray();
        int number = Integer.parseInt(new String(aa));
        int number1 = Integer.parseInt(new String(vv));
        BigInteger n = BigInteger.valueOf(number);
        BigInteger z = BigInteger.valueOf(number1);
        n=n.add(z);
        System.out.println(n);
    }
}