poj1503

高精度

import java.util.*;
import java.math.*;

public class Main {
    public static void main(String[] args)
    {
        Scanner cin = new Scanner(System.in);
        BigInteger a = cin.nextBigInteger();
        BigInteger sum = BigInteger.ZERO;
        while (!a.equals(BigInteger.ZERO))
        {
            sum = sum.add(a);
            a = cin.nextBigInteger();
        }
        System.out.println(sum);
    }
}