POJ3241 最小曼哈顿距离生成树 - 真有趣哇

【POJ3241 最小曼哈顿距离生成树 - 真有趣哇】的更多相关文章

POJ3241 最小曼哈顿距离生成树 - 真有趣哇

目录 Catalog Solution: (有任何问题欢迎留言或私聊 && 欢迎交流讨论哦 Catalog Problem:Portal传送门原题目描述在最下面. 给你n个坐标,求最小曼哈顿距离生成树. Solution: 请一定要理解: 有一个剪枝:把坐标分成$8$块,在一个$45$度区间内,只需要向与之距离最近的点连边. 虽然一共有$8$个相对区域,但我们只需考虑$4$个,中心对称的不需要再连一次边.这$4$个区域坐标转化一下即可求解. 先考虑每个点\…

Hdu4311 || 4312Meeting point-1/-2 n个点中任意选一个点使得其余点到该点曼哈顿距离之和最小

Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 3448 Accepted Submission(s): 1144 Problem Description It has been ten years since TJU-ACM established. And in this year all the retired TJU-ACM…

poj3241 曼哈顿最小距离生成树第k大的边

思路: 已知: 要生成曼哈顿距离最小生成树,一个点最多和四周8个点连线,那8个点分别是将那个点四周360度平分成8个区间,每个区间里面和那个点曼哈顿距离最小的点,所以如果有n个点,那么最多有4n条边,然后就可以用kruskal算法去做. #include <iostream> //poj3241 曼哈顿距离最小生成树第k大的边 #include <cstdio> #include <cstring> #include <algorithm> #include…

某个点到其他点的曼哈顿距离之和最小（HDU4311）

Meeting point-1 Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Others) Total Submission(s): 2866 Accepted Submission(s): 919 Problem Description It has been ten years since TJU-ACM established. And in this year all the…

TZOJ 1689 Building A New Barn(求平面上有几个其它点求到n个点的曼哈顿距离最小)

描述 After scrimping and saving for years, Farmer John has decided to build a new barn. He wants the barn to be highly accessible, and he knows the coordinates of the grazing spots of all N (2 ≤ N ≤ 10,000 cows. Each grazing spot is at a point with int…

HDU 4311 Meeting point-1（曼哈顿距离最小）

http://acm.hdu.edu.cn/showproblem.php?pid=4311 题意:在二维坐标中有n个点,现在要从这n个点中选出一个点,使得其他点到该点的曼哈顿距离总和最小. 思路: 离散化分别处理x坐标和y坐标. 将点按照x坐标进行排序,sum数组记录记录前缀和,那么当选第i个点时其余点在x轴到该点的距离为 $(i-1)*p[i].x-sumx[i-1] + (sumx[n]-sumx[i]) - (n-i)*p[i].x$. y坐标同理. #include<iostream>…