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Stars Time limit: 0.25 secondMemory limit: 64 MB Astronomers often examine star maps where stars are represented by points on a plane and each star ha 阅读全文
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Distance in the Tree Time limit: 1.0 secondMemory limit: 64 MB A weighted tree is given. You must find the distance between two given nodes. Input The 阅读全文
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Nested Segments Time limit: 1.0 secondMemory limit: 64 MB You are given n segments on a straight line. For each pair of segments it is known that they 阅读全文
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Monobilliards Time limit: 1.0 secondMemory limit: 64 MB A monobilliards table set up in a gaming house of a town N turned out to be a very profitable 阅读全文