Rules: Divide the grid along the dotted lines into regions called polyominoes so that no two polyominoes with the same area share an edge. Inside some cells are numbers; each number must represent the area of the polyomino it belongs to. A polyomino may contain zero, one, or more of the given numbers. (It is possible for a “hidden” polyomino — a polyomino without any of the given numbers — to contain a value that is not present in the starting grid such as a 6 in a puzzle with only 1-5 clues.)
Solution code: Row 2, row 6.
on 4. January 2023, 05:26 by TJReds
penpa link: https://tinyurl.com/2nr2e2ms
(For those that may prefer it)
on 22. October 2022, 17:50 by Drawoon
pzv: http://pzv.jp/p.html?fillomino/9/9/g14h2h1g2j1i31j3j343m2n1k1j12i3i2h2h5h45g