Rules - Polyominous

Polyominous was invented by the Japanese puzzle company Nikoli.  The name is from Zotmeister.

1. Divide the grid into polyominoes.
2. Each space in the grid will have a number in it.
3. Each number must be in a polyomino with that number of squares.
4. No two polyominoes with the same number of squares may touch on any of their edges.
5. A polyomino may contain any number (including zero) of the numbers originally given.