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] -> 
Return unique values without sorting
Simple equation: Annual salary
Decrypt the cypher using XOR encryption (for beginners)
Recycled Numbers (CodeJam Qualification Round 2012)
Longest Collatz Sequence
Narcissistic number ?
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