Logic Masters Deutschland e.V.

This was made for Round 4 of The Skunkworks League - Season Two. We had to make a puzzle using only arrows in the grid.

Fillomino: Divide the grid into polyominoes (orthogonally connected regions) such that no two polyominoes of the same size share an edge. Fill each cell of a polyomino with a number equal to its size (if the number is greater than nine, enter the ones digit in the grid for the answer check).
Renban Arrows: A number N in a cell with an arrow indicates that there is a straight line N cells long starting in the cell and extending in the direction of the arrow. This line acts as a renban line: It consists of a set of consecutive, non-repeating numbers in some order. Each line is at least two cells long. Lines from different arrows may overlap. Consider multiple arrows in the same cell separately.

Links:
SudokuPad: https://sudokupad.app/n2r0e0040k