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();
}
}

}