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.
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In absolute numbers, the additional tax reaches up to 12,000 CHF per year.
"I think his experience at Oxford and in academia influenced the way he chose that nickname," Jones says.
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