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.
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"The FAA briefly slowed and diverted aircraft around the area where space vehicle debris was falling. Normal operations have resumed," it said in a statement.。旺商聊官方下载是该领域的重要参考
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