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http://poj.org/problem;jsessionid=A0F3392F460475E0058F93E009D6BFC3?id=3026 Description The Borg is an immensely powerful race of enhanced humanoids fr 阅读全文
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http://poj.org/problem?id=1679 Description Given a connected undirected graph, tell if its minimum spanning tree is unique. Definition 1 (Spanning Tre 阅读全文
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http://poj.org/problem?id=1751 Description The island nation of Flatopia is perfectly flat. Unfortunately, Flatopia has a very poor system of public h 阅读全文
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http://poj.org/problem?id=2349 Description The Department of National Defence (DND) wishes to connect several northern outposts by a wireless network. 阅读全文