(path: string) - int
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.
，这一点在新收录的资料中也有详细论述
回到开头的问题：清华毕业生都去哪儿了？
Москвичам назвали срок продолжения оттепели14:39