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Construct a 2^n x 2^n permutation of integers 0..2^(2n)-1 so that the four quadrants (top-right, bottom-right, bottom-left, top-left) have strictly increasing value ranges (top-right < bottom-right < bottom-left < top-left) and each quadrant itself is recursively a special grid; return any grid satisfying this for n ≤ 10.
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Leetcode 3537. Fill a Special Grid
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