HDU-1047 Integer Inquiry 大数相加

import java.io.*;
import java.util.*;
import java.text.*;
import java.math.*;
public class Main
{
public static void main(String args[])
{
int t;
Scanner scan = new Scanner( System.in );
t = scan.nextInt();
BigInteger ans = BigInteger.ZERO,a;
while( (t--)>0 )
{
ans = BigInteger.ZERO;
while( true )
{
a = scan.nextBigInteger();
if( a.compareTo(BigInteger.ZERO) == 0 )
break;
ans = ans.add(a);
}
System.out.println(ans);
if( t > 0 )
System.out.println("");
}

}
}

import java.math.BigInteger;
import java.util.Scanner;

public class Main
{
public static void main(String[] args)
{
Scanner scanner = new Scanner(System.in);
while(scanner.hasNext())
{
String s1 = scanner.next();
String s2 = scanner.next();

BigInteger num1 = new BigInteger(s1);
BigInteger num2 = new BigInteger(s2);

System.out.println(num1.add(num2));
}
}
}