it's a bit unclear why padding is necessary in the first two test cases, where the number of characters (15) is already a multiple of the key size (3 or 5, respectively)
I agree with Alfonso.
@Mehmet can you explain why?
Count from 0 to N^M in base N.
Determine if a Given Number is a Triangle Number
Return elements unique to either input
find radius of cone
Create an n-by-n null matrix and fill with ones certain positions
Create initial basic feasible solution for transportation problems -Minimum Cost Method
Van Eck's Sequence's nth member
Dealing with correlation results!
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