摘要：
题目链接： http://poj.org/problem?id=1269 题目描述： Intersecting Lines Description We all know that a pair of distinct points on a plane defines a line and tha 阅读全文
摘要：
题目链接： http://poj.org/problem?id=3304 题目描述： Segments Description Given n segments in the two dimensional space, write a program, which determines if th 阅读全文