The tree starts as a single region covering the whole space. As points arrive, they get dropped into the region that contains them. When a region exceeds its capacity (the maximum number of points it can hold before splitting), the region divides into four children, and the existing points get redistributed.
ATM. ATMs hand out cash, and one thing we all know about cash is that once you
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configurable: false,
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To: Sundar Pichai, Chief Executive Officer, Google