mx刚来洛谷想问个问题

灌水区

@[Garrosh](/user/310524)
by xiezihan @ 2020-02-14 21:22:24

![](https://cdn.luogu.com.cn/upload/image_hosting/bv03zy2k.png)
by xiezihan @ 2020-02-14 21:22:39

https://baike.baidu.com/item/%E8%B0%94%E8%B0%94/5860152?fr=aladdin
by xiezihan @ 2020-02-14 21:23:42

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