题目链接:http://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&page=show_problem&problem=2896 大概思路:A和B运动,以A(Posa)为参考点,求出B的运动轨迹(Posb -> Posb + Vb-Va); #include<cstdio> #include<cstring> #include<cmath> #include&l…

#include<cstdio> #include<cstring> #include<cmath> #include<iostream> #include<algorithm> #include<queue> #include<vector> using namespace std; struct Point{ double x,y; Point(, ) : x(x),y(y){ } //构造函数 }; typedef…

Problem ATriangle Fun Input: Standard Input Output: Standard Output In the picture below you can see a triangle ABC. Point D, E and F divides the sides BC, CA and AB into ratio 1:2 respectively. That is CD=2BD, AE=2CE and BF=2AF. A, D; B, E and C, F…

题目链接:https://cn.vjudge.net/problem/UVA-12304 题意: 作为题目大合集,有以下一些要求: ①给出三角形三个点,求三角形外接圆,求外接圆的圆心和半径. ②给出三角形三个点,求三角形内接圆,求内接圆的圆心和半径. ③给出一个圆,和一个点,求过该点的圆的切线与x轴的夹角(0<=angle<180): ④给出一条直线,一个点p,指定半径r,求经过点p的与直线相切的半径为r的圆: ⑤给出两条直线,求与这两条直线相切的圆: ⑥给出两个圆,求同时与这两个圆相切的圆:…

链接: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&page=show_problem&problem=4077 题意: 三角剖分是指用不相交的对角线把一个多边形分成若干个三角形.输入一个简单m(2<m<50)边形,找一个最大三角形面积最小的三角剖分.输出最大三角形的面积. 分析: 和“最优三角剖分”一样,设d(i,j)为子多边形i,i+1,…,j-1,j(i<j)的最…

Problem D Morley's Theorem Input: Standard Input Output: Standard Output Morley's theorem states that that the lines trisecting the angles of an arbitrary plane triangle meet at the vertices of an equilateral triangle. For example in the figure below…

题目大意:给出平面上许多矩形的中心点和倾斜角度,计算这些矩形面积占这个矩形点形成的最大凸包的面积比. 算法:GRAHAM,ANDREW. 题目非常的简单,就是裸的凸包 + 点旋转.这题自己不会的地方就是点旋转,另外,Andrew 算法还没有调试出来 .有一个非常细节的地方:给出的矩形有N个,但是点有4*N个. 直接上代码:GRAHAM #include <cstdio> #include <iostream> #include <algorithm> #include…

Problem B Board Wrapping Input: standard input Output: standard output Time Limit: 2 seconds The small sawmill in Mission, British Columbia, has developed a brand new way of packaging boards for drying. By fixating the boards in special moulds, the b…

多边形凸包.. .. Board Wrapping Time Limit: 3000MS Memory Limit: Unknown 64bit IO Format: %lld & %llu Submit Status Description Problem B Board Wrapping Input: standard input Output: standard output Time Limit: 2 seconds The small sawmill in Mission, Briti…

题目 题目 分析 跟着lrj学的,理解了,然而不是很熟,还是发上来供以后复习 代码 #include <bits/stdc++.h> using namespace std; ; struct Point { int x,y; double rad; bool operator < (const Point &rhs) const{ return rad<rhs.rad; } }op[maxn],p[maxn]; int n,color[maxn]; bool left(P…