Maximum Size Hollow Square

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You are given a grid with $N$ rows and $M$ columns, where each cell contains either '0' or '1'. You may perform the following operation up to $K$ times: choose two different cells and swap the values in them. Find the largest possible side length of a square subgrid which contains only '0'-s after performing these operations. ### Input - The first line of the input contains a single integer

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solution.cppC++17

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