纪念一下第一次用JAVA写大数！

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,k = 0;t = cin.nextInt();while(t!=0){t--;k++;BigInteger n,m,aaa;n = cin.nextBigInteger();m = cin.nextBigInteger();aaa = n.add(m);System.out.println("Case "+k+":");System.out.println(n+" + "+m+" = "+aaa);}}}