ACM-I'll play a trick on you

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描述

Please look the picture carefully. Then I‘ll give you two integers and your task is output the third one.
Please never doubt the picture.

输入

The first line is a number T(1<=T<=30), represents the number of case. The next T blocks follow each indicates a case.
Each case contains two integers A,B (1<=B<=A<=10^100)

输出

For each case, output the number of case and the third integer.

样例输入

3
99 72
45 27
39 18

样例输出

27
18
21

代码：

ACM-I'll play a trick on you

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原文地址：http://blog.csdn.net/u012701023/article/details/46044863