Segments Time Limit: 1000MS Memory Limit: 65536K Description Given n segments in the two dimensional space, write a program, which determines if there exists a line such that after projecting these segments on it, all projected segments have at least…

Area Time Limit: 1000MS Memory Limit: 10000K Description Being well known for its highly innovative products, Merck would definitely be a good target for industrial espionage. To protect its brand-new research and development facility the company has…

POJ 3304 Segments 大意:给你一些线段,找出一条直线可以穿过全部的线段,相交包含端点. 思路:遍历全部的端点,取两个点形成直线,推断直线是否与全部线段相交,假设存在这种直线,输出Yes.可是注意去重. struct Point { double x, y; } P[210]; struct Line { Point a, b; } L[110]; double xmult(Point p1, Point p2, Point p) { return (p1.x-p.x)*(p2.y…

Toy Storage Time Limit: 1000MS Memory Limit: 65536K Description Mom and dad have a problem: their child, Reza, never puts his toys away when he is finished playing with them. They gave Reza a rectangular box to put his toys in. Unfortunately, Reza is…

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…

Wall Time Limit: 1000MS Memory Limit: 10000K Description Once upon a time there was a greedy King who ordered his chief Architect to build a wall around the King's castle. The King was so greedy, that he would not listen to his Architect's proposals…

Space Ant Time Limit: 1000MS Memory Limit: 10000K Description The most exciting space discovery occurred at the end of the 20th century. In 1999, scientists traced down an ant-like creature in the planet Y1999 and called it M11. It has only one eye o…

POJ 3304  Segments 题意:给定n(n<=100)条线段,问你是否存在这样的一条直线,使得所有线段投影下去后,至少都有一个交点. 思路:对于投影在所求直线上面的相交阴影,我们可以在那里作一条线,那么这条线就和所有线段都至少有一个交点,所以如果有一条直线和所有线段都有交点的话,那么就一定有解. 怎么确定有没直线和所有线段都相交?怎么枚举这样的直线?思路就是固定两个点,这两个点在所有线段上任意取就可以,然后以这两个点作为直线,去判断其他线段即可.为什么呢?因为如果有直线和所有线段都相…

题目传送门:POJ 3304 Segments Description Given n segments in the two dimensional space, write a program, which determines if there exists a line such that after projecting these segments on it, all projected segments have at least one point in common. Inp…

题目链接:POJ 3304 Problem Description Given n segments in the two dimensional space, write a program, which determines if there exists a line such that after projecting these segments on it, all projected segments have at least one point in common. Input…