题目简单，仅作记录用
------------------------------------------------------------------------------------------------------import java.util.Scanner;

public class hdoj1000 {
public static void main(String[] args){

    String a = null;
    String b = null;
    int case_num;
    Scanner in = new Scanner(System.in);

        case_num = in.nextInt();
        for (int x = 0; x < case_num; x++)
        {
            a = in.next();
            b = in.next();



            int flag = 0;

            char[] as = new char[1000];
            char[] bs = new char[1000];
            char[] is = new char[1001];


            int max = a.length() > b.length() ? a.length() : b.length();

            for (int i = 0; i < a.length(); i++) as[i] = a.charAt(a.length()-1 - i);


            for (int i = 0; i < b.length(); i++) bs[i] = b.charAt(b.length() -1 - i);



            for (int i = 0; i < max; i++)
            {
                if(as[i] == 0)
                    is[i] = bs[i];
                else if(bs[i] == 0)
                    is[i] = as[i];
                else {
                    is[i] = (char) (as[i] + bs[i]);
                    is[i] = (char) (is[i] - '0');
                }
            }


            for (int i = 0; i < max ; i++)
            {
                if(i == max - 1 && is[i] > '9')
                    flag = 1;
                if(is[i] > '9')
                {

                    is[i] = (char) (is[i] - 10);
                    is[i + 1] = (char) (is[i + 1] + 1);

                }
            }

            if (flag == 1) {
                is[max] = '1';
                String s = "";
                for(int i = 0; i <= max; i++)
                {
                    s += is[max - i];
                }

                int tmp = x + 1;
                System.out.println("Case " + tmp + ":");
                System.out.println(a + " + " + b + " = " + s );
            }else
            {
                String s = "";
                for (int i = 0; i < max; i++) s += is[max - i - 1];

                int tmp = x + 1;
                System.out.println("Case " + tmp + ":");
                System.out.println(a + " + " + b + " = "  + s );
            }

            if(x != case_num - 1)
                System.out.println();

        }

}

}