Replicate each element of a row vector (with NaN) a constant number of times.
n=2, A=[1 2 3] -> [1 1 2 2 3 3]
n=0, A=[2 1] -> 
Increment a number, given its digits
Determine the number of odd integers in a vector
Sum of odd numbers in a matrix
Make a half wave rectifier
Rank of magic square (for beginners)
Negation and new variables
Mirror, mirror on the wall, who is fairest of them all?
Chess ELO rating system
Decrypt the cypher using XOR encryption (for beginners)
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