Kuromasu #71
Color the gray cells of the grid black or white. A cell with a number is always white.
The number indicates how many white cells you can see in total when looking north, south, east, and west from that cell until your view is blocked by a black cell or the edge of the grid (the cell with the number is counted).
Black cells must not be orthogonally adjacent. All white cells must form a single, orthogonally contiguous area.