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.
Longest Divisor Run
Dimensions of a rectangle
Divisible by 9
Divisible by 11
Multivariate polynomials - emulate symbolic form
Find vampire numbers
Fangs of a vampire number
Multivariate polynomials - convert monomial form to array
Multivariate polynomials - sort monomials
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