poj3067详解——树状数组

最新推荐文章于 2019-05-03 11:58:27 发布

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最新推荐文章于 2019-05-03 11:58:27 发布 · 535 阅读

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本文详细解析了poj3067题目，该问题涉及到计算在日本东海岸和西海岸城市间构建的K条超级高速公路的交叉点数量。通过将问题转化为求逆序对的数量来解决，阐述了如何利用排序和树状数组来高效计算交叉点数目，并提供了相关资源链接以加深理解。

Japan

Time Limit: 1000MS		Memory Limit: 65536K
Total Submissions: 32106		Accepted: 8633

Description

Japan plans to welcome the ACM ICPC World Finals and a lot of roads must be built for the venue. Japan is tall island with N cities on the East coast and M cities on the West coast (M <= 1000, N <= 1000). K superhighways will be build. Cities on each coast are numbered 1, 2, ... from North to South. Each superhighway is straight line and connects city on the East coast with city of the West coast. The funding for the construction is guaranteed by ACM. A major portion of the sum is determined by the number of crossings between superhighways. At most two superhighways cross