摘要：
Mirror and LightTime Limit: 2000/1000 MS (Java/Others)Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 650Accepted Submission(s): 316Problem DescriptionThe light travels in a straight line and always goes in the minimal path between two points, are the basic laws of optics.Now, our prob 阅读全文
摘要：
爆头Time Limit: 2000/1000 MS (Java/Others)Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 1447Accepted Submission(s): 601Problem Descriptiongameboy是一个CS高手，他最喜欢的就是扮演警察，手持M4爆土匪的头。也许这里有人没玩过CS，有必要介绍一下“爆头”这个术语：所谓爆头，就是子弹直接命中对方的头部，以秒杀敌人。现在用一个三维的直角坐标系来描述游戏中的三维空间（水平面为xoy平面，z轴正方向是上方）。假设游戏中角色的头是一个标 阅读全文