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…

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…

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 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: 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…

https://icpcarchive.ecs.baylor.edu/index.php?option=com_onlinejudge&Itemid=8&page=show_problem&problem=2640 http://www.spoj.com/problems/SPOINTS/en/ http://poj.org/problem?id=3805 http://judge.u-aizu.ac.jp/onlinejudge/description.jsp?id=1298 要…

地址:http://poj.org/problem?id=1329 题目: Circle Through Three Points Time Limit: 1000MS   Memory Limit: 10000K Total Submissions: 3970   Accepted: 1667 Description Your team is to write a program that, given the Cartesian coordinates of three points on…

import java.text.DecimalFormat;import java.util.Scanner; public class TheAreaOfCircle { public static void main(String[] args) { /*问题描述 给定圆的半径r,求圆的面积. 输入格式 输入包含一个整数r,表示圆的半径. 输出格式 输出一行,包含一个实数,四舍五入保留小数点后7位,表示圆的面积. 说明:在本题中,输入是一个整数,但是输出是一个实数. 对于实数输出的问题,请…

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…