HDU 1047 Integer Inquiry

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

public class Main
{
static public void main(String[] args)
{
Scanner cin = new Scanner(System.in);

int T = cin.nextInt();

for(int ca = 1; ca <= T; ca++)
{
BigInteger sum = new BigInteger(cin.next());
cin.nextLine();

while(true)
{
String s = cin.nextLine();
if(s.isEmpty() || s.equals("0")) break;
BigInteger t = new BigInteger(s);
sum = sum.add(t);
}

System.out.println(sum);
if(ca != T) System.out.println();
}

cin.close();
}
}