A quadtree does the same thing for two-dimensional space. It takes a rectangular region and divides it into four equal quadrants: northwest, northeast, southwest, southeast. If a quadrant has too many points in it, it subdivides again and again. Each subdivision creates smaller and smaller cells where points are densely packed.
My technique had changed at this point. Since he was trying multiple things, well, I had to as well.
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processed by machines, do we really need to courier them to rooms full of