The quadtree is the two-dimensional case of a broader family of space-partitioning data structures. Octrees extend the same idea to three dimensions (splitting cubes into eight children), KD-trees use alternating axis-aligned splits (splitting along x, then y, then x again), and R-trees group nearby objects into bounding rectangles. Each variant makes different tradeoffs between construction time, query speed, and update cost.
Samsung’s Unpacked event midweek revealed three new phones and two sets of earbuds, but the real standout, as usual, is the Galaxy S26 Ultra. This year, the Ultra actually features a bit of genuine tech innovation — and no, we don’t mean it folds.
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