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这几天一直在搞这个东西,今天总算搞懂了,函数式线段树是一种解决离线算法的数据结构,我是这样理解的,它将所有数据离散化,再对每一个节点 N 建一颗(1,N)的线段树,这是它的思路,当然如果真正的去建这么多线段树,内存肯定爆了,所以这个就是函数式线段树的高级的地方,它从分利用前缀和的思想,后一颗树和前一... 阅读全文
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DescriptionCalculate the number of toys that land in each bin of a partitioned toy box.Mom and dad have a problem - their child John never puts his to... 阅读全文
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题目描述Given you a circle and a rectangular in a plane.You task is to find out how many intersecting points between the circle and the rectangular?输入Mult... 阅读全文
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题目描述In our childhood, we all like playing games with our friends. Now you are a teacher in a kindergarten and there are n children in your class. Befo... 阅读全文
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题目描述There are N tasks and M resources, each task is asked to use some resources and each resource can only be used by at most one task. You are asked ... 阅读全文
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DescriptionFor the daily milking, Farmer John'sNcows (1 ≤N≤ 50,000) always line up in the same order. One day Farmer John decides to organize a game o... 阅读全文