Maby this one needs some more test suites ;)
improve test suit
Maybe more test cases here? ;-)
Back to basics 22 - Rotate a matrix
Wrapping the Tower of Pisa
Generate a vector like 1,2,2,3,3,3,4,4,4,4
Change the sign of even index entries of the reversed vector
Swap two numbers
Find the area of the four walls
Convert a number to its Roman representation
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