poj 1584(综合性强的计算几何，好题)

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poj 1584(综合性强的计算几何，好题)

A Round Peg in a Ground Hole Time Limit: 1000MS Memory Limit: 10000K Total Submissions: 6238 Accepted: 1997 Description The DIY Furniture company specializes in assemble-it-yourself furniture kits. Typically, the pieces of wood are attached to on…

POJ 1061 青蛙的约会数论水题

http://poj.org/problem?id=1061 傻逼题不多说 (x+km) - (y+kn) = dL 求k 令b = n-m ; a = x - y ; 化成模线性方程一般式 : Lx+by=a 再除gcd化简成最简形式使得L,b互素 (即构造 L'x+b'y =1) 求Ex_GCD得到 y * a 就是最后的答案...还是一样要化成正整数形式 pair<LL,LL> ex_gcd(LL a,LL b){ ) ,); pair<LL,LL> t = ex_gcd(…

POJ 1584 A Round Peg in a Ground Hole 判断凸多边形点到线段距离点在多边形内

首先判断是不是凸多边形然后判断圆是否在凸多边形内不知道给出的点是顺时针还是逆时针,所以用判断是否在多边形内的模板,不用是否在凸多边形内的模板 POJ 1584 A Round Peg in a Ground Hole(判断凸多边形,点到线段距离,点在多边形内) #include <iostream> #include <cstdio> #include <cstring> #include <algorithm> #include <cmath&g…

POJ P2318 TOYS与POJ P1269 Intersecting Lines——计算几何入门题两道

rt,计算几何入门: TOYS Calculate the number of toys that land in each bin of a partitioned toy box. Mom and dad have a problem - their child John never puts his toys away when he is finished playing with them. They gave John a rectangular box to put his toy…

POJ 1584 A Round Peg in a Ground Hole【计算几何=_=你值得一虐】

链接: http://poj.org/problem?id=1584 http://acm.hust.edu.cn/vjudge/contest/view.action?cid=22013#problem/D A Round Peg in a Ground Hole Time Limit: 1000MS Memory Limit: 10000K Total Submissions: 4475 Accepted: 1374 Description The DIY Furniture com…

POJ 1584 计算几何

思路: 求一遍凸包用三角形面积(叉积求一下)/边长求出来高,跟半径比一比坑点:凸包上三点共线 //By SiriusRen #include <cmath> #include <cstdio> #include <algorithm> using namespace std; #define eps 1e-9 ; int n,top,k,f;double r; struct Point{double x,y;}point[N],tubao[N],cir; Poin…

2018.07.04 POJ 1654 Area（简单计算几何）

Area Time Limit: 1000MS Memory Limit: 10000K Description You are going to compute the area of a special kind of polygon. One vertex of the polygon is the origin of the orthogonal coordinate system. From this vertex, you may go step by step to the fol…