Жители Санкт-Петербурга устроили «крысогон»17:52
How do Wi-Fi extenders work?
，这一点在旺商聊官方下载中也有详细论述
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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.