Circle Through Three Points Time Limit: 1000MS   Memory Limit: 10000K Total Submissions: 3169   Accepted: 1342 Description Your team is to write a program that, given the Cartesian coordinates of three points on a plane, will find the equation of the…

题目链接:http://poj.org/problem?id=1329 #include<cstdio> #include<cmath> #include<algorithm> #include<iostream> #include<cstring> using namespace std; typedef long long ll; ; int sgn(double x) { ; ? - : ; } struct Point{ double x…

题目链接:http://poj.org/problem?id=1329 输出很蛋疼,要考虑系数为0,输出也不同 #include<cstdio> #include<cstring> #include<cmath> #include<iostream> #include<algorithm> #include<queue> using namespace std; ; const double PI = acos(-1.0); cons…

题链: http://poj.org/problem?id=1329 题解: 计算几何,求过不共线的三点的圆 就是用向量暴力算出来的东西... (设出外心M的坐标,由于$|\vec{MA}|=|\vec{MB}|=|\vec{MC}|$,可以解出M点坐标.) 代码: #include<cmath> #include<cstdio> #include<cstring> #include<iostream> using namespace std; const…

Circle Through Three Points Time Limit: 1000MS   Memory Limit: 10000K Total Submissions: 3766   Accepted: 1570 Description Your team is to write a program that, given the Cartesian coordinates of three points on a plane, will find the equation of the…

题目链接 抄的外心模版.然后,输出认真一点.1Y. #include <cstdio> #include <cstring> #include <string> #include <cmath> #include <algorithm> using namespace std; #define eps 1e-8 struct point { double x,y; }; struct line { point a,b; }; point inte…

Circle Through Three Points Time Limit: 1000MS   Memory Limit: 10000K Total Submissions: 4112   Accepted: 1712 Description Your team is to write a program that, given the Cartesian coordinates of three points on a plane, will find the equation of the…

模板题,注意一下输出就可以. #include <iostream> #include <cstdio> #include <cmath> #include <algorithm> using namespace std; struct point { double x,y; }; struct triangle{ point t[3]; }t; struct Circle{ double x,y; double r; }tmp; double dist(p…

转自:http://blog.csdn.net/tyger/article/details/4480029 计算几何题的特点与做题要领:1.大部分不会很难,少部分题目思路很巧妙2.做计算几何题目,模板很重要,模板必须高度可靠.3.要注意代码的组织,因为计算几何的题目很容易上两百行代码,里面大部分是模板.如果代码一片混乱,那么会严重影响做题正确率.4.注意精度控制.5.能用整数的地方尽量用整数,要想到扩大数据的方法(扩大一倍,或扩大sqrt2).因为整数不用考虑浮点误差,而且运算比浮点快. 一.点…

//第一期 计算几何题的特点与做题要领: 1.大部分不会很难,少部分题目思路很巧妙 2.做计算几何题目,模板很重要,模板必须高度可靠. 3.要注意代码的组织,因为计算几何的题目很容易上两百行代码,里面大部分是模板.如果代码一片混乱,那么会严重影响做题正确率. 4.注意精度控制. 5.能用整数的地方尽量用整数,要想到扩大数据的方法(扩大一倍,或扩大sqrt2).因为整数不用考虑浮点误差,而且运算比浮点快. 一.点,线,面,形基本关系,点积叉积的理解 POJ 2318 TOYS(推荐) http:/…