poj 1503 && hdu 1047 大数相加

import java.io.*;
import java.util.*;
import java.math.*;
public class Main{
public static void main(String[] args){
Scanner cin = new Scanner(System.in);
boolean flag = false;
BigInteger a = BigInteger.valueOf(0);
while(cin.hasNextBigInteger())
{
BigInteger key = cin.nextBigInteger();
BigInteger b = BigInteger.valueOf(0);
if(key.compareTo(b)==0){
flag = true;
}
if(flag == true)break;
a=a.add(key);
}
System.out.println(a);
}
}