Trinudo

Trinudo is a Japanese logic puzzle. Divide the grid into areas consisting of one, two or three cells. In fact, Trinudo is a limited Fillomino, but it’s still fun.

Rules: A number between 1 and 3 must be entered in each cell of the grid so that there are areas of cells with the same number that are the same size as the number.
Two different areas of the same size must not be orthogonally (but diagonally) neighbouring.
Two preset numbers may belong to the same area; areas can also be created that do not contain a single preset number.