2020-C01

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原文章内容如下：

= Official Site =
http://acm.hdu.edu.cn/contests/contest_show.php?cid=909
= Onsite Ranking =
http://acm.hdu.edu.cn/contests/contest_ranklist.php?cid=909&page=1
= Test Data & Participants' Solution =
Solution: See attachment for the official solution.
= Upsolving =
http://acm.hdu.edu.cn/listproblem.php?vol=59, 6888-6900
= Ranklist =
[[Image(2020-C01.png)]]

Official Site

http://acm.hdu.edu.cn/contests/contest_show.php?cid=909

Onsite Ranking

http://acm.hdu.edu.cn/contests/contest_ranklist.php?cid=909&page=1

Test Data & Participants' Solution

Solution: See attachment for the official solution.

Upsolving

http://acm.hdu.edu.cn/listproblem.php?vol=59, 6888-6900

Ranklist

附加文件