Shakashaka #67
Draw one of four possible black triangles (◢, ◣, ◤,◥) in some white cells; some white cells can also be left empty.
A number in a black cell indicates how many triangle sides are orthogonally adjacent to that cell. Black cells without a number can have any number of triangle sides adjacent to them.
The remaining white areas must all be rectangular. A rectangle can be oriented horizontally, vertically, or obliquely. Two white rectangles may not be orthogonally adjacent (but diagonally).