2016年7月26日
Eureka
摘要： Professor Zhang draws n points on the plane, which are conveniently labeled by 1,2,...,n. The i-th point is at (xi,yi). Professor Zhang wants to know 阅读全文
posted @ 2016-07-26 09:46 大领主 阅读(136) 评论(0) 推荐(0) 编辑