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Problem Statement
There is a grid with H horizontal rows and W vertical columns. Let (i,j) denote the square at the i-th row from the top and the j-th column from the left.For each i and j (1≤i≤H, 1≤j≤W), Square (i,j) is described by a character ai,j. If ai,j is ., Square (i,j) is an empty square...