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@[我为saber上大师](/space/show?uid=34941)
by Hammer_cwz_77 @ 2017-08-15 14:38:44
@[神犇（cwz）](/space/show?uid=34939) 你傻啊？
by xyx_xcc @ 2017-08-15 14:53:07
@[我为saber上大师](/space/show?uid=34941) 猪皮？
by Hammer_cwz_77 @ 2017-08-15 15:54:18
@[神犇（cwz）](/space/show?uid=34939) 你是真傻
by xyx_xcc @ 2017-08-15 16:08:00
@[我为saber上大师](/space/show?uid=34941) 你就是个巨神
by Hammer_cwz_77 @ 2017-08-15 17:03:31
哈哈
by 田田 @ 2018-01-07 11:11:13
@[田田](/space/show?uid=53487)
by 田田 @ 2018-01-07 11:11:34
Bessie hears that an extraordinary meteor shower is coming; reports say that these meteors will crash into earth and destroy anything they hit. Anxious for her safety, she vows to find her way to a safe location (one that is never destroyed by a meteor) . She is currently grazing at the origin in the coordinate plane and wants to move to a new, safer location while avoiding being destroyed by meteors along her way.
The reports say that M meteors (1 ≤ M ≤ 50,000) will strike, with meteor i will striking point (Xi, Yi) (0 ≤ Xi ≤ 300; 0 ≤ Yi ≤ 300) at time Ti (0 ≤ Ti ≤ 1,000). Each meteor destroys the point that it strikes and also the four rectilinearly adjacent lattice points.
Bessie leaves the origin at time 0 and can travel in the first quadrant and parallel to the axes at the rate of one distance unit per second to any of the (often 4) adjacent rectilinear points that are not yet destroyed by a meteor. She cannot be located on a point at any time greater than or equal to the time it is destroyed).
Determine the minimum time it takes Bessie to get to a safe place
贝西听说一场非凡的流星雨即将来临;有报道称这些流星将撞击地球并摧毁任何它们击中的物体。出于对她安全的担心，她发誓要找到一条安全的地方（一个永远不会被流星摧毁的地方）。她目前正在坐标平面上吃草，想要搬到一个新的、更安全的地方，同时避免在途中被流星摧毁。
报道称，流星（1万5万）将会撞击，流星将击中点（Xi，Yi）（0 Xi 300;0 Yi 300）在时间Ti（0 Ti 1000）。每颗流星摧毁了它撞击的点，也破坏了四个直线相邻的晶格点。
贝西在0时刻离开原点，可以在第一象限，以每秒钟一个距离单位的速度与坐标轴平行，到任何一个（通常是4）相邻的直线点，它们还没有被流星摧毁。在任何时候，她都不能被定位在一个点上，大于或等于它被摧毁的时间）。
确定贝茜到达安全地点的最短时间。
by Microsoftmonkey @ 2018-05-18 20:39:23
机翻
by Microsoftmonkey @ 2018-05-18 20:39:36
by Low_key_smile @ 2022-04-17 21:09:28