Wall Painting

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Chef wanted to paint a wall in his house, but he did not like the way ordinary people paint walls. So he invented a new machine that can do so. Consider the wall to be a rectangular grid of height N and width M such that the top-left corner is (1, 1) and the bottom-right corner is (N, M). Chef can input the coordinates of the top-left corner and the bottom-right corner of any rectangle on this gri

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solution.cppC++17

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