Tom and Grid

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Tom has a grid of $R$ rows and $C$ columns. The grid contains $(R*C)$ squares in it. Each square in the grid has some number of blocks $X$ on it. $(X \geq 0)$ But,Tom wants to make the no. of blocks in all the squares equal. To do that he is allowed to do the following operation. - He can remove any number of block from any square in the grid. What is the minimum number of blocks that Tom has

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solution.cppC++17

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