【Java练习4】POJ 1503

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

public class Main{
public static void main(String[] args){
Scanner cin = new Scanner(new BufferedInputStream(System.in));
BigInteger n;
BigInteger sum = new BigInteger("0");
while(cin.hasNextBigInteger()){
BigInteger zero = new BigInteger("0");
n = cin.nextBigInteger();
if(n.compareTo(zero)==0)break;
sum = sum.add(n);
}
System.out.println(sum);
}
}