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.
Всего, по предварительным данным, в центре города прогремело три взрыва. Несколько ракет попали по университетской улице и району Джомхури.
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* 时间复杂度: O(n²) 最好: O(n) 空间复杂度: O(1) 稳定: ✓
for (let i = 0; i < n; i++) {