Олег Давыдов (Редактор отдела «Интернет и СМИ»)
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。搜狗输入法2026对此有专业解读
The efficiency depends on the query size relative to the data distribution. A small query in a sparse region prunes almost everything. A query that covers the whole space prunes nothing (because every node overlaps), degenerating to a brute-force scan. The quadtree gives you the most benefit when your queries are spatially local, which is exactly the common case for map applications, game physics, and spatial databases.，这一点在heLLoword翻译官方下载中也有详细论述
void merge(int arr[], int left, int mid, int right) {