Luogu 1452 Beauty Contest 求平面最远点对,先求出凸包,再找凸包的直径. 使用旋转卡壳,直径一定出现在对踵点对间.比较不同点到同一直线距离可以用叉积算三角形面积来比较. 实现时注意关于栈的 \(top\) 的细节. #include<bits/stdc++.h> using namespace std; #define ll long long #define mp make_pair #define pii pair<int,int> inline int…

/* poj 2187 Beauty Contest 凸包:寻找每两点之间距离的最大值 这个最大值一定是在凸包的边缘上的! 求凸包的算法: Andrew算法! */ #include<iostream> #include<cstdio> #include<cstring> #include<algorithm> using namespace std; struct Point{ Point(){} Point(int x, int y){ this->…

Description Bessie, Farmer John's prize cow, has just won first place in a bovine beauty contest, earning the title 'Miss Cow World'. As a result, Bessie will make a tour of N (2 <= N <= 50,000) farms around the world in order to spread goodwill bet…

http://poj.org/problem?id=2187 显然直径在凸包上(黑书上有证明).(然后这题让我发现我之前好几次凸包的排序都错了QAQ只排序了x轴.....没有排序y轴.. 然后本题数据水,暴力也能过... (之前一直以为距离是单增的,其实并不是,应该是三角形面积单增...) 考虑旋转卡壳 一篇好的文章:http://www.cnblogs.com/Booble/archive/2011/04/03/2004865.html 首先对踵点就是两条平行线夹紧凸包的两个点(或者3个点或4…

链接:http://poj.org/problem?id=2187 Description Bessie, Farmer John's prize cow, has just won first place in a bovine beauty contest, earning the title 'Miss Cow World'. As a result, Bessie will make a tour of N (2 <= N <= 50,000) farms around the wor…

Beauty Contest 题意:给你一个数据范围在2~5e4范围内的横纵坐标在-1e4~1e4的点,问你任意两点之间的距离的最大值的平方等于多少? 一道卡壳凸包的模板题,也是第一次写计算几何的题,就看了些模板,关于预备知识;我是直接找到左下角的点,排好序之后,就直接形成凸包,之后调用rotating_calipers()求解:里面注意在凸包构造好之后,因为是++top的,所以在后面卡壳里面%top会出现问题,所以循环之后再一次++top;开始看graham()里面的while循环看了很久,其…

Time Limit: 3000MS   Memory Limit: 65536K Total Submissions: 25256   Accepted: 7756 Description Bessie, Farmer John's prize cow, has just won first place in a bovine beauty contest, earning the title 'Miss Cow World'. As a result, Bessie will make a…

转载请注明出处: http://www.cnblogs.com/fraud/          ——by fraud Beauty Contest Time Limit: 3000MS   Memory Limit: 65536K Total Submissions: 31214   Accepted: 9681 Description Bessie, Farmer John's prize cow, has just won first place in a bovine beauty con…

Beauty Contest Time Limit: 3000MS   Memory Limit: 65536K Total Submissions: 27276   Accepted: 8432 Description Bessie, Farmer John's prize cow, has just won first place in a bovine beauty contest, earning the title 'Miss Cow World'. As a result, Bess…

id=2187">Beauty Contest Time Limit: 3000MS   Memory Limit: 65536K Total Submissions: 27218   Accepted: 8410 Description Bessie, Farmer John's prize cow, has just won first place in a bovine beauty contest, earning the title 'Miss Cow World'. As a…