Check whether two given lines are orthogonal or not.
Two lines are orthogonal if they create a right angle at their intersections.
here (x1,y1) and (x2,y2) form a line.
Back to basics 10 - Max Float
Sum the elements in either diagonal of a square matrix
Volume of a Simplex
Abelian Sandpile - 01
Coin Distribution - 02
Yoonir - 03
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