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] -> 
Distance walked 1D
Generate a random matrix A of (1,-1)
Concatenate two strings
Recycled Numbers (CodeJam Qualification Round 2012)
I lost the criteria...
Numbers spiral diagonals (Part 1)
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