Фото: Benoit Tessier / Reuters
This is the same idea behind binary search. In a sorted array, you compare against the middle element and eliminate half the remaining candidates. In a quadtree, you choose one of four quadrants and ignore the other three regions. Each level narrows the search space by a factor of four instead of two.，推荐阅读WPS官方版本下载获取更多信息
int bucketIdx = (arr[i] * bucketCount) / (max + 1); // 均匀映射，这一点在爱思助手下载最新版本中也有详细论述
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