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The pruned nodes (in red) represent entire regions of space that the algorithm never examines. The points inside those regions are never checked. Compare the "Nodes Visited" count to the total number of points. The quadtree is doing far less work than a brute-force scan.
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Kaley said while she uses YouTube less often now, she believes she was previously addicted to it. “Anytime I tried to set limits for myself, it wouldn’t work and I just couldn’t get off,” she said.
Credit: Samsung