HDOJ 1002 java

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



public class Main {

    public static void main(String[] args) {
        
            Scanner scanner= new Scanner(System.in);
            int n=scanner.nextInt();
            for(int i=1;i<=n;i++)
            {
                BigInteger a=scanner.nextBigInteger();
                BigInteger b=scanner.nextBigInteger();
                BigInteger c=a.add(b);
                System.out.println("Case "+i+":");
                System.out.println(a+" + "+b+" = "+c);
                if(i!=n)
                System.out.println();
            }
                    scanner.close();
            
    }

}