定存什么：要下标/距离就栈里存索引，只要值就存值或存索引再 nums[i] 取。
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.
。业内人士推荐体育直播作为进阶阅读
Последние новости
人気記事ランキング直近24時間（1時間ごとに更新。5分ごとはこちら）
Gallaghers visit mum before Oasis play Maine Road