swap(&arr[low], &arr[j]);
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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.。业内人士推荐heLLoword翻译官方下载作为进阶阅读
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谷歌 TPU 破局这笔交易的杀伤力，不仅在于当下的租赁合同。，这一点在WPS下载最新地址中也有详细论述