poj 1113 Wall (凸包模板题）

Max Angle # **Time Limit: 4000/2000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Others) Total Submission(s): 678 Accepted Submission(s): 238 **

Transmitters Time Limit: 1000MS Memory Limit: 10000K Total Submissions: 4817 Accepted: 2576 Description In a wireless network with multiple transmitters sending on the same frequencies, it is often a requirement that signals don’t overlap, or at least that they don’t conflict. One way of accomplishing this is to restrict a transmitter’s coverage area. This problem uses a shielded transmitter that only broadcasts in a semicircle.

20190211update：工作的时候看同事ocr的代码，发现有一段就是极角排序orz…所以说算法还是有用的…