题目连接:hdu_1007_Quoit Design 题意: 给你平面上的一些点,让你找出这些点的最近点对的距离 题解: 采用分治,达到O(nlognlogn)的时间复杂度就能艹过去了 #include<stdio.h> #include<string.h> #include<algorithm> #include<math.h> using namespace std; //O(nlognlogn)找最近点对 ; struct TPoint { doubl…

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): 25335    Accepted Submission(s): 6716 Problem Description Have you ever played quoit in a playground? Quoit is a game in which flat…

最近点问题:二维平面中有n(n很大)个点,求出距离最近的两个点 思路:因为n的值很大,所以暴力和dp都行不通了吧!分治法就挺好的. 将区间一半一半的分开,直到分成只有一个点或两个点的时候! 对于只有两个点的区间,最小值就是这两个点的距离,只有一个点的区间, 最小值就是无穷大.注意还要考虑合并的时候,可能距离最近的两个点, 分别在左右两个不同的区间.对于这种情况的处理如下: mid=(ld+rd)/2; ans = min(solve(ld, mid), solve(mid+1, rd));得到两…

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…

ZOJ2107 给定10^5个点,求距离最近的点对的距离. O(n^2)的算法是显而易见的. 可以通过分治优化到O(nlogn) 代码很简单 #include<iostream> #include<stdio.h> #include<stdlib.h> #include<string.h> #include<math.h> #include<algorithm> #include<queue> #include<ve…

HDU 1000 A + B Problem  I/O HDU 1001 Sum Problem  数学 HDU 1002 A + B Problem II  高精度加法 HDU 1003 Maxsum  贪心 HDU 1004 Let the Balloon Rise  字典树,map HDU 1005 Number Sequence  求数列循环节 HDU 1007 Quoit Design  最近点对 HDU 1008 Elevator  模拟 HDU 1010 Tempter of th…

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…

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…

Quoit Design Time Limit: 5 Seconds      Memory Limit: 32768 KB 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…