Description 已知平面内 N 个点的坐标,求欧氏距离下的第 K 远点对. Input 输入文件第一行为用空格隔开的两个整数 N, K.接下来 N 行,每行两个整数 X,Y,表示一个点 的坐标.1 < = N < = 100000, 1 < = K < = 100, K < = N*(N−1)/2 , 0 < = X, Y < 2^31. Output 输出文件第一行为一个整数,表示第 K 远点对的距离的平方(一定是个整数). Sample I…
Time Limit: 10 Sec Memory Limit: 128 MBSubmit: 1235 Solved: 418[Submit][Status][Discuss] Description The course of Software Design and Development Practice is objectionable. ZLC is facing a serious problem .There are many points in K-dimensional sp…
Range Search (kD Tree) The range search problem consists of a set of attributed records S to determine which records from Sintersect with a given range. For n points on a plane, report a set of points which are within in a given range. Note that you…
这篇随笔是对Wikipedia上k-d tree词条的摘录, 我认为解释得相当生动详细, 是一篇不可多得的好文. Overview A \(k\)-d tree (short for \(k\)-dimensional tree) is a binary space-partitioning tree for organizing points in a \(k\)-dimensional space. \(k\)-d trees are a useful data structure for…
Today, TripAdvisor held a tech talk in Columbia University. The topic is about k-d Tree implemented in TripAdvisor to efficiently search MASSIVE location tree. Problem Millions of locations, it's tough to perform Nearest Neighbor Search. Solution Us…