杭电 1002 A + B Problem II

import java.io.*;

import java.util.*;

import java.math.*;

public class Main {

       public static void main(String args[])

       {

    	   Scanner cin=new Scanner(System.in);

    	   int t;

    	   BigInteger a,b,c;

    	   t=cin.nextInt();

    	   for(int i=1;i<=t;i++)

    	   {

    		   a=cin.nextBigInteger();

    		   b=cin.nextBigInteger();

    		   c=a.add(b);

    		   System.out.println("Case " + i +":");

    		   System.out.println(a + " + " + b + " = " + c);

    		   if(i!=t)

    		   {

    			   System.out.println();

    		   }

    	   }

       }

}