Asif, Thanks for another nice problem.
I think the description would be improved if it said the "red shaded portion", because there are two shaded portions in the drawing.
Check to see if a Sudoku Puzzle is Solved
Scoring for oriented dominoes
We love vectorized solutions. Problem 1 : remove the row average.
Sum the Digits of a Number
Sum of series I
Do they touch?
Coin Distribution - 02
Abelian Sandpile - 01
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