POJ1066 题意:给出一个100*100的正方形区域,通过若干连接区域边界的线段将正方形区域分割为多个不规则多边形小区域,然后给出宝藏位置,要求从区域外部开辟到宝藏所在位置的一条路径,使得开辟路径所需要打通的墙壁数最少("打通一堵墙"即在墙壁所在线段中间位置开一空间以连通外界),输出应打通墙壁的个数(包括边界上墙壁). 思路:枚举每一个入口,在所有的情况中取穿墙数最少的输出即可,枚举每一个入口的时候,并不用枚举每条边的中间点,直接枚举该线段的两个顶点就行(因为要经过一个墙,那么从线…

129. Inheritance time limit per test: 0.25 sec. memory limit per test: 4096 KB The old King decided to divide the Kingdom into parts among his three sons. Each part is a polygonal area. Taking into account the bad temper of the middle son the King ga…

"求线段交点"是一种非常基础的几何计算, 在很多游戏中都会被使用到. 下面我就现学现卖的把最近才学会的一些"求线段交点"的算法总结一下, 希望对大家有所帮助. 本文讲的内容都很初级, 主要是面向和我一样的初学者, 所以请各位算法帝们轻拍啊 嘎嘎 引用 已知线段1(a,b) 和线段2(c,d) ,其中a b c d为端点, 求线段交点p .(平行或共线视作不相交) =============================== 算法一: 求两条线段所在直线的交点, 再…

Mirror and Light Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 650    Accepted Submission(s): 316 Problem Description The light travels in a straight line and always goes in the minimal path b…

E. Covered Points 利用克莱姆法则计算线段交点.n^2枚举,最后把个数开方,从ans中减去. ans加上每个线段的定点数, 定点数用gcs(△x , △y)+1计算. #include <algorithm> #include <iterator> #include <iostream> #include <cstring> #include <cstdlib> #include <iomanip> #include…

#include<stdio.h> #include<math.h> const double eps=1e-8; int n; struct Point { double x,y; Point (){} Point (double _x,double _y) { x=_x; y=_y; } Point operator -(const Point &b)const { return Point (x-b.x,y-b.y); } double operator *(cons…

Treasure Hunt Time Limit : 2000/1000ms (Java/Other)   Memory Limit : 20000/10000K (Java/Other) Total Submission(s) : 3   Accepted Submission(s) : 2 Problem Description Archeologists from the Antiquities and Curios Museum (ACM) have flown to Egypt to…

链接:http://acm.hdu.edu.cn/showproblem.php?pid=1086 You can Solve a Geometry Problem too Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 7167    Accepted Submission(s): 3480 Problem Description Ma…

You can Solve a Geometry Problem too Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others) Total Submission(s): 7847    Accepted Submission(s): 3834 Problem Description Many geometry(几何)problems were designed in the ACM/…

很简单的算法,这里是把每对线段都进行比较了. 还有一种似乎先通过x和y排序再进行交点判断的,不过那种方法我还没看太明白. 这里的方法如下: 1.根据线段的端点求两条直线的交点. 2.判断直线的交点是否在两条线段上. 结果如下: matlab代码如下: clear all;close all;clc; n=; p=rand(n,); %(x1,y1,x2,y2)线段两端点 :n pbar=p(i,:); pbar=reshape(pbar,[,]); line(pbar(,:),pbar(,:))…