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] -> 
Who knows the last digit of pi?
Find best placement for ordered dominoes (harder)
How many trades represent all the profit?
02 - Vector Variables 4
length of a vector
Divisors for big integer
Find the path through the cell
Mysterious digits operation (easy)
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