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?
Make a Palindrome Number
Given an unsigned integer x, find the largest y by rearranging the bits in x
"Low : High - Low : High - Turn around " -- Create a subindices vector
Make a 1 hot vector
Produce the following matrix
Find a real root of a quintic function without using roots function
Grouped Frequency Distributions
Recaman Sequence - III
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