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.
2 days agoShareSave
，详情可参考夫子
Source: Computational Materials Science, Volume 267
The latest available data shows some local authorities recycle just a fifth of household waste.
Фото: Пати Амирбекова / «Лента.ру»