I'm not even quite sure when the 3614 was introduced, but based on manual
2026年3月1日，伊朗政府宣布最高领袖哈梅内伊遇袭身亡。
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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.
