Return a matrix of numbers of dimension K by N, where K = prod(v), and N=length(v). The rows count from a vector of ones up to v, where the nth element of a row can take on the values 1:v(n).
the text does not specify the expected order of the rows
It would be helpful if the text gave an example. Also, the test suite should be much richer - only two special cases does not really encourage people to write general solutions.
Based on Paul Berglund's solution (Solution 321219).
Not a great solution, but the test suite needs to be improved.
Reverse Run-Length Encoder
Find common elements in matrix rows
Switch matrix to a column vector
Count from 0 to N^M in base N.
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