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时长:00:00更新时间:2020-11-09 08:32:32
CodeforcesRound#286(Div.2)D.:Shuseki Kingdom is the world's leading nation for innovation and technology. There are n cities in the kingdom, numbered from 1 to n . Thanks to Mr. Kitayuta's research, it has finally become possible to construct teleportation pipes betwe
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