Duplicate a character 'n' times.
Example 1: str='a' n=5
Example 2: str='*' n=3
n is a nonnegative interger.may it be the largest problem that i meet.
My initial solution with repelem(str,n) for n=0 creates a size 1x0 char class but suite only allows for a 0x0 class. Not sure why the difference would matter.
Times 2 - START HERE
Remove the polynomials that have positive real elements of their roots.
How long is the longest prime diagonal?
Change the sign of even index entries of the reversed vector
Symmetry of vector
Moving average (variable kernel length)
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