Time Limit: 3000MS   Memory Limit: 65536K Total Submissions: 32708   Accepted: 10156 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…

题目:http://poj.org/problem?id=2187 学习材料:https://blog.csdn.net/wang_heng199/article/details/74477738 https://www.jianshu.com/p/74c25c0772d6 可以再倒着枚举一遍那样求凸包. 用叉积算面积来旋转卡壳. 注意在面积等于的时候就不要往后走了,不然只有两个点的数据就会死循环. #include<cstdio> #include<cstring> #inclu…

旋转卡壳求凸包的直径的平方 板子题 #include<cstdio> #include<vector> #include<cmath> #include<algorithm> using namespace std; struct Point { int x, y; Point(int x=0, int y=0):x(x),y(y) { } }; typedef Point Vector; Vector operator - (const Point&…

题目:http://poj.org/problem?id=2187 学习资料:https://blog.csdn.net/wang_heng199/article/details/74477738 https://www.jianshu.com/p/74c25c0772d6 注意求凸包时先下后上,保持逆时针: 别忘了给点排序囧. 代码如下: #include<cstdio> #include<cstring> #include<algorithm> #include&l…

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…

 凸包(旋转卡壳) 大概理解了凸包A了两道模板题之后在去吃饭的路上想了想什么叫旋转卡壳呢?回来无聊就搜了一下,结果发现其范围真广. 凸包: 凸包就是给定平面图上的一些点集(二维图包),然后求点集组成的凸多边形,但是要包含所有的点. 求凸多边形的方法:Graham算法描述如下: Graham()算法先对点进行排序,有极角序和水平序两种排序方式.我们仍然以左下方的点作为基准点来通过叉积进行排序.利用STL里面的sort或者自己写个排序算法,排序所用时间为O(NlogN),极角序列如左图所示:极角排序…

/* 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->…

题目链接:http://poj.org/problem?id=2187 Time Limit: 3000MS Memory Limit: 65536K 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…

链接: http://poj.org/problem?id=2187 http://acm.hust.edu.cn/vjudge/contest/view.action?cid=22013#problem/E Beauty Contest Time Limit: 3000MS   Memory Limit: 65536K Total Submissions: 24254   Accepted: 7403 Description Bessie, Farmer John's prize cow, h…

题面 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 between farm…