So we can follow up during verification. Not published.
63-летняя Деми Мур вышла в свет с неожиданной стрижкой17:54
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This is the same idea behind binary search. In a sorted array, you compare against the middle element and eliminate half the remaining candidates. In a quadtree, you choose one of four quadrants and ignore the other three regions. Each level narrows the search space by a factor of four instead of two.
Жители Санкт-Петербурга устроили «крысогон»17:52