Edit Distance on Grid

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Problem description. Recently, Chef is learning how to compute the edit distance between two strings. Today, Chef wants to generalize the concept of edit distance to 2D-grid(s). Given a 2D-grid with N rows and M columns, each cell of the grid is either white or black. There are three operations to change the grid: 1) Swap two cells share a common edge, which takes 1 second, or 2) Change one w

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solution.cppC++17

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