本次笔试在牛客在线笔试平台， 记录一下编程题的题目。

Author: o_oyao

Link: http://dyingdown.github.io/2021/09/18/%E7%BD%91%E6%98%93%E9%9B%B7%E7%81%AB2021%E7%A7%8B%E6%8B%9B%E7%AC%94%E8%AF%95/

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