第三章 违反治安管理的行为和处罚
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.
。关于这个话题，51吃瓜提供了深入分析
南方周末：所以你几乎没有时间去“享受”这次胜利？，这一点在safew官方版本下载中也有详细论述
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