蓝桥杯

package Test_2019;

import java.math.BigInteger;
import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        BigInteger b = new BigInteger("0");
        while(in.hasNext()) {
            String s = new String(in.nextLine());
            BigInteger c = new BigInteger(s);
            b=b.add(c);
        }
        System.out.println(b.toString());
        in.close();
    }

}