I think it would be better to allow negative n instead of adding a third parameter.
There seems to be a problem with the first test case. Since we are rotating 3*45 degrees cw and 1*45 degrees ccw. The result should be 90 degrees cw (rot90(x,-1)), but it is not. And the problem description needs to be fixed: m=1 is actually n=1.
The Goldbach Conjecture
Back to basics 19 - character types
Negation the hard way
Find the index of the largest value in any vector X=[4,3,4,5,9,12,0,4.....5]
Rotate Matrix Clockwise (45 Degree)
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