Balance the Numbers
Shapes:
divide each cell by 2 (rounded down)
Rules:
1. Each cell must be filled in with either red or blue, with the exception of one gray cell.
2. When the puzzle is complete, the sum of red and blue numbers in every column must be equal.
3. Forming shapes of the same color changes the value of those numbers. Each cell can only be a part of one shape at a time.