bzoj 3053 HDU 4347 : The Closest M Points  kd树 题目大意:求k维空间内某点的前k近的点. 就是一般的kd树,根据实测发现,kd树的两种建树方式,即按照方差较大的维度分开(建树常数大)或者每一位轮换分割(询问常数大),后者更快也更好些,以后就果断写第二种了. #include<iostream> #include<cstring> #include<cstdio> #include<algorithm> using…

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…

版权声明:本文为博主原创文章,未经博主允许不得转载. hdu 4347 题意: 求k维空间中离所给点最近的m个点,并按顺序输出  . 解法: kd树模板题 . 不懂kd树的可以先看看这个 . 不多说,上代码 . #include <iostream> #include <cstdio> #include <algorithm> #include <cmath> #include <cstring> #include <queue> #…

传送门 解题思路 \(KD-Tree\)模板题,\(KD-Tree\)解决的是多维问题,它是一个可以储存\(K\)维数据的二叉树,每一层都被一维所分割.它的插入删除复杂度为\(log^2 n\),它查询最近点对的复杂度为\(O(n^{\frac{k-1}{k}}\),\(k\)代表维数.用堆维护最近点,查询时就先找到它属于的区域,然后回溯时判断一下它到父节点的距离和堆顶的大小,如果比堆顶还大就不递归它的兄弟节点. 代码 #include<iostream> #include<cstdio…

Problem - 4347 一道KNN的题.直接用kd树加上一个暴力更新就撸过去了.写的时候有一个错误就是搜索一边子树的时候返回有当前层数会被改变了,然后就直接判断搜索另一边子树,搞到wa了半天. 代码如下: #include <cstdio> #include <iostream> #include <cstring> #include <algorithm> #include <vector> using namespace std; ;…

The Closest M Points Time Limit: 16000/8000 MS (Java/Others)    Memory Limit: 98304/98304 K (Java/Others)Total Submission(s): 3285    Accepted Submission(s): 1201 Problem Description The course of Software Design and Development Practice is objection…

居然是KD解. /* 4347 */ #include <iostream> #include <sstream> #include <string> #include <map> #include <queue> #include <set> #include <stack> #include <vector> #include <deque> #include <algorithm>…

本文参考: https://www.cnblogs.com/GerynOhenz/p/8727415.html kuangbin的ACM模板(新) 题目链接:http://acm.hdu.edu.cn/showproblem.php?pid=4347 Problem Description The course of Software Design and Development Practice is objectionable. ZLC is facing a serious problem…

Description The course of Software Design and Development Practice is objectionable. ZLC is facing a serious problem .There are many points in K-dimensional space .Given a point. ZLC need to find out the closest m points. Euclidean distance is used a…

赤果果的kdTree. 学习传送门:http://www.cnblogs.com/v-July-v/archive/2012/11/20/3125419.html 其实就是二叉树的变形 #include<bits/stdc++.h> using namespace std; ,K = ; #define squ(x) ((x)*(x)) int k,n,idx; struct Point { int x[K]; bool operator <(const Point& rhs)…