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This is the same idea behind binary search. In a sorted array, you compare against the middle element and eliminate half the remaining candidates. In a quadtree, you choose one of four quadrants and ignore the other three regions. Each level narrows the search space by a factor of four instead of two.，推荐阅读safew官方版本下载获取更多信息
Sign up for the Entrepreneur Daily newsletter to get the news and resources you need to know today to help you run your business better. Get it in your inbox.。业内人士推荐91视频作为进阶阅读
In the Air Force, she stood out from the crowd and was selected to join the astronaut programme. She was to fly Space Shuttles - Nasa's reusable "space planes".，推荐阅读51吃瓜获取更多信息
Фото: Алексей Филиппов / РИА Новости