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Leetcode 2033. Minimum Operations to Make a Uni-Value Grid

Check whether every grid value is congruent modulo x (otherwise return -1); if they are, treat the flattened values and minimize total |delta| by choosing the median target — the minimum operations equals the sum of |value - median| divided by x.

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Leetcode 2033. Minimum Operations to Make a Uni-Value Grid | Hello Interview