hdu 1002 大数相加

import java.io.*;import java.util.*;import java.math.*;import java.text.*;public class Main {public static void main(String[] args) {          Scanner cin=new Scanner(System.in);          int t=cin.nextInt();          for(int i=1;i<=t;i++)          {         BigInteger a=cin.nextBigInteger();         BigInteger b=cin.nextBigInteger();         System.out.println("Case "+i+":");         System.out.println(a+" + "+b+" = "+a.add(b));         if(i!=t)         System.out.println();          }}}