Fillomino Puzzle

When it comes to my favorite puzzle type, Fillomino is also part of the list. However I, not much expert in solving this kind of puzzle. I need to practice more or Fillomino type puzzles.

Rules of Fillomino

Divide the grid along the given lines into regions called zones so that no two zones with the same area share an edge. Inside some cells are numbers; each number must represent the area of the zone it belongs to. A zone may contain zero, one, or more of the given numbers. (It is possible for a “hidden” zone— a zone without any of the given numbers.