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.
Трамп высказался о непростом решении по Ирану09:14。夫子是该领域的重要参考
sortFunc(testArr, n);。关于这个话题，51吃瓜提供了深入分析
Jim Lovell, Fred Haise and Jack Swigert are rescued from the Pacific Ocean after their dramatic escape