Matrix Sum

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We call an N × M matrix nice, if it satisfies both these conditions: - Each of its elements is either a 0 or a 1. - We define two cells of the matrix to be adjacent, if they share a side. All the cells containing a 1 should form a single connected component. More formally: You should be able to reach any cell containing a 1 from any other cell containing a 1 through a sequence of steps, where a

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solution.cppC++17

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