The output of * operator in this solution is a struct, rather than a mPoly object. Nevertheless, the test suite does not check the type of the output.
L Y Cao, since you're such a wizard with indices, I'd love to see you solve this without converting to the array form. It would be interesting to compare the approaches.
Andrew Newell, thanks for your advice.
Maximum running product for a string of numbers
Number of 1s in the Binary Representation of a Number
Find the index of n in magic(n)
Sum of series VII
Multivariate polynomials - sort monomials
Find vampire numbers
Fangs of a vampire number
Negation the hard way
Multivariate polynomials - emulate symbolic form
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