Background Activity icons are just a little bit cuter
Prosecutors said in court that officers arrived at the park after a 911 call about a disorderly group, including people climbing on a roof.
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Now that we can build the tree, let's use it to search. Finding a specific point means starting at the root and asking: which child quadrant contains this coordinate? Then you recurse into that child and ask again. Each level of the tree cuts the search space by roughly three-quarters.