A quadtree does the same thing for two-dimensional space. It takes a rectangular region and divides it into four equal quadrants: northwest, northeast, southwest, southeast. If a quadrant has too many points in it, it subdivides again and again. Each subdivision creates smaller and smaller cells where points are densely packed.
"Trends that would have unfolded in a season are now taking up to 48 hours and I would say [creatives] have made fashion faster, more democratic and far more conversational."
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成立超过百年的松下集团，把昔日最赚钱的业务交给了中国公司。
Мощный удар Израиля по Ирану попал на видео09:41
对违反治安管理的外国人，可以附加适用限期出境或者驱逐出境。