问题陈述：

　　

 

代码详解(Java)：　　

import java.io.BufferedInputStream;import java.math.BigInteger;import java.util.Scanner;public class Main {    public static void main(String[] args) {        Scanner sc = new Scanner(new BufferedInputStream(System.in));        int t, id = 0;        BigInteger a, b, c;        t = sc.nextInt();        while(t-- > 0) {            id++;            a = sc.nextBigInteger();            b = sc.nextBigInteger();            c = a.add(b);            System.out.println("Case " + id + ":");            System.out.println(a + " + " + b + " = " + c);            if(t != 0) {                System.out.println("");            }        }        sc.close();    }}

 

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