题目描述

Dr Lu says we need to have more easy problems so that every one attending the contest can solve them. Though the problem above is easy enough, he also wants some more easy problems, so this problem is set.

As the title of the problem indicates, this is a check in problem, You just need to output how many canteens in our QLU.

输入格式

输出格式

The answer using number like 2.

样例

None 

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