Question 104
We have a square grid of $19 \times 19$. We call a rectangle **good** if its edges are all along the border of small squares. What is the smallest $n$ with the following property?
Property: If $9$ small squares are removed from the grid, we can divide remaining area into $n$ or less number of good rectangles.
Property: If $9$ small squares are removed from the grid, we can divide remaining area into $n$ or less number of good rectangles.