Дания захотела отказать в убежище украинцам призывного возраста09:44
const len = nums.length;
，详情可参考safew官方版本下载
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.，这一点在旺商聊官方下载中也有详细论述
int j = high; // 从右向左找小于pivot的