Regions with many nearby points keep subdividing. Regions with few or no points stay large. The tree adapts to the data: dense areas get fine-grained cells, sparse areas stay coarse. The split grid is predetermined (always at midpoints), but the tree only refines cells that need it. Sparse regions stay as single large nodes while dense regions subdivide deeply.
微信上线新功能：同一文件多聊转发不重复占存储
。关于这个话题，同城约会提供了深入分析
print(f"Completed! Processed {len(self.seen_urls)} pages")
const n = nums.length;