Quoit Design Time Limit: 10000/5000 MS (Java/Others) Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 30919 Accepted Submission(s): 8120 Problem Description Have you ever played quoit in a playground? Quoit is a game in which flat rings…

题目链接:http://acm.hdu.edu.cn/showproblem.php?pid=1007 题意:给你n(2<=n<=10^6)个点的坐标,然后找到两个点使得他们之间的距离最小,然后输出最小距离的一半; 先把n个点按x坐标排序,然后求左边n/2个和右边n/2个的最近距离,最后合并. 首先,假设点是n个,编号为1到n.我们要分治求,则找一个中间的编号mid,先求出1到mid点的最近距离设为d1,还有mid+1到n的最近距离设为d2.这里的点需要按x坐标的顺序排好,并且假设这些点中,没…

Quoit Design Time Limit: 10000/5000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others) Total Submission(s): 28539    Accepted Submission(s): 7469 Problem Description Have you ever played quoit in a playground? Quoit is a game in which flat…

题目链接:http://acm.hdu.edu.cn/showproblem.php?pid=1007 Quoit Design Time Limit: 10000/5000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 42865    Accepted Submission(s): 11128 Problem Description Have you ever played…

题目链接:http://acm.hdu.edu.cn/showproblem.php?pid=1007 简单裸题,测测模板,G++速度快了不少,应该是编译的时候对比C++优化了不少.. //STATUS:G++_AC_1703MS_5004KB #include <functional> #include <algorithm> #include <iostream> //#include <ext/rope> #include <fstream>…

题意: 给出平面上的n个点,问任意点对之间的最短距离是多少? 思路: 先将所有点按照x坐标排序,用二分法将n个点一分为二个部分,递归下去直到剩下两或一个点.对于一个部分,左右部分的答案分别都知道,那么可能的答案就是min(left_ans,right_ans) .注意更小的点对可能一个在左,一个在右.所以还得处理两个边内的紧靠着的部分,如果左边的一个点到达中线的距离已经超过当前最短距离,那么这个点到达右边任意一个点也不会是最短距离了.同时,若一左一右的两个点的y距离已经超过目前最短距离,那么也不…

http://acm.hdu.edu.cn/showproblem.php?pid=1007 给出n个玩具(抽象为点)的坐标 求套圈的半径 要求最多只能套到一个玩具 实际就是要求最近的两个坐标的距离 典型的最近点对问题 最近点对详解 http://blog.csdn.net/lonelycatcher/article/details/7973046 //最近点对 # include <stdio.h> # include <algorithm> # include <math…

题目意思很简单,意思就是求一个图上最近点对. 具体思想就是二分法,这里就不做介绍,相信大家都会明白的,在这里我说明一下如何进行拼合. 具体证明一下为什么只需要检查6个点 首先,假设当前左侧和右侧的最小值为d,那么对于一个点,如果有个最小值小于d,那么一定存在于上d下d左d右d的一块区域内,又因为是从左到右,从上到下,所以左侧的那部分匹配的区域会重叠,也就是对于左侧的区域,完全没有必要去进行匹配.所以只需要对右侧d,上下d的区域进行匹配,而假设这个区域内的所以点的距离为d那么最多为6个,那么如果长…

Quoit Design Problem Description Have you ever played quoit in a playground? Quoit is a game in which flat rings are pitched at some toys, with all the toys encircled awarded. In the field of Cyberground, the position of each toy is fixed, and the ri…

Quoit Design Time Limit: 10000/5000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 29344    Accepted Submission(s): 7688 Problem Description Have you ever played quoit in a playground? Quoit is a game in which flat…