Maximize the GBP

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Berland is a small country represented as a grid with $N×M$ blocks (N adjacent rows with M adjacent column). Each block has either a stock exchange or it is a residential block. Berland has exactly $5$ stock exchanges and hence $N×M - 5$ residential blocks. Location of all stock exchanges is fixed. You are given location of all $5$ stock exchanges in the form of Ri, Ci which means that ith stoc

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solution.cppC++17

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