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.
Built a repeatable, profitable sales process.
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{ 24, 10, 12, 26, 35, 47, 49, 37 },，详情可参考同城约会
渐渐地，对于消费者而言，购买完美日记，开始缺乏理由。，详情可参考WPS下载最新地址