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Chef and his $X$ friends have became famous and have decided to shift to a new building. The building have several rooms. The floors of the building are numbered from $1$ to $N$ and the rooms of each floor are numbered from $1$ to $M$. A room can either be occupied or empty. - Occupied rooms are marked with $0$ - Vacant rooms are marked with $1$ Given a matrix $B$ representing the building consi

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solution.cppC++17

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