The quadtree is the two-dimensional case of a broader family of space-partitioning data structures. Octrees extend the same idea to three dimensions (splitting cubes into eight children), KD-trees use alternating axis-aligned splits (splitting along x, then y, then x again), and R-trees group nearby objects into bounding rectangles. Each variant makes different tradeoffs between construction time, query speed, and update cost.
Follow topics & set alerts with myFT
，更多细节参见51吃瓜
Ahrefs is a more user-friendly option. It takes seconds
8年攻坚，我国历史性摆脱绝对贫困，创造了又一个“彪炳史册的人间奇迹”。