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Four Winds with Parks (571)
Instruction:
Draw arrows in the empty cells in the grid. Arrows can only point in the four directions indicated on the compass rose and must begin at the edge of a cell with a number. Each empty cell must be covered by at most one arrow. Each number indicates the total length of all the arrows that begin at an edge next to that number’s cell.
In each row and column, exactly one cell must remain empty.