Airando

Airando (Island) is a logical puzzle that challenges players to strategically blacken specific cells to create distinct islands composed of white cells.

Rules: Colour the grey cells of the grid black or white. Cells with numbers may not be blacked out.
All white squares must form a single orthogonally contiguous area.
A number in a white cell indicates how many empty white cells can be reached from this cell without crossing a black cell or another number cell.