Integer Inquiry

import java.lang.*;
import java.util.*;
import java.text.*;
import java.math.*;
import java.io.*;
class Main
{
    public static void main(String []args)
    {
        int n;
        BigInteger a1,a2;
        Scanner cin=new Scanner(System.in);
        while(cin.hasNext())
        {
            n=cin.nextInt();
            while(n--!=0)
            {
                a2=BigInteger.valueOf(0);
                a1=cin.nextBigInteger();
                while(a1.compareTo(BigInteger.valueOf(0))!=0)
                {
                    a2=a2.add(a1);
                    a1=cin.nextBigInteger();
                }
                System.out.println(a2);
                if(n!=0)System.out.println();
            }
        }
    }
}