similar to Problem 412. Back to basics 22 - Rotate a matrix
Their is a command for this already built in. rot90(x)
Which doors are open?
Test for balanced parentheses
Sum the numbers on the main diagonal
Finding perimeter of a rectangle
Are all the three given point in the same line?
Calculate the area of a triangle between three points
Replace Vector Elements
Find number of days
Given a number find two variables
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