Write a function that has the following property: f(f(x)) = -x for any numeric array x.
Note that there is no restriction on the output for f(x). How bizarre can you make it?
This one really surprised me.
Getting a little silly!
Roll the Dice!
Multiply a column by a row
Find a Pythagorean triple
ベクトル [1 2 3 4 5 6 7 8 9 10] の作成
Product of two multivariate polynomials
Find all vampire fangs
Outer product of multiple vectors
Find vampire numbers
Multivariate polynomials - convert monomial form to array
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