UOJ Extraordinary Round!

zici

题目有点水，请大家慢点A

资瓷

难度和NOI相近……

后排围观

资瓷

MD5 太弱了, 换 sha256 吧

后排等题解qwq.第一次玩uer就掉rating了qwq.....

求题解/kel

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