摘要：
3维空间中的最小生成树。。。。好久没碰关于图的东西了。。。。。 Building a Space StationTime Limit:1000MSMemory Limit:30000KTotal Submissions:3804Accepted:1940DescriptionYou are a member of the space station engineering team, and are assigned a task in the construction process of the station. You are expected to write a compu... 阅读全文
摘要：
The Moving PointsTime Limit: 6000/3000 MS (Java/Others)Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 878Accepted Submission(s): 353Problem DescriptionThere are N points in total. Every point moves in certain direction and certain speed. We want to know at what time that the largest d 阅读全文