/kel

https://m-sea-blog.com/archives/afo

https://www.luogu.com.cn/blog/qwqkrrrr/farewell1

https://ouuan.github.io/post/2019以及毕业之前/

https://orchidany.gitee.io/2020/09/30/New-Start/

https://www.luogu.com.cn/blog/fusu2333/post-zhong-yan-sdoi2020-tui-yi-sui-bi

https://www.cnblogs.com/Mr-Spade/p/13443475.html

https://blog.csdn.net/qq_39972971/article/details/108307428

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