Querying on a Grid

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Chef is helping out at a volunteering center for teaching. A child comes to Chef with a problem that he is not able to solve and asks Chef for his help. The problem is the following: Consider an M × N grid graph. The vertices in the grid graph are identified by its row and column number, i.e., for a vertex there are two numbers (i,j) associated with it, where 1 ≤ i ≤ M is its row, and 1 ≤ j ≤ N

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solution.cppC++17

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