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!
given 3 sides, find area of this triangle
Matrix with different incremental runs
Get the length of a given vector
Flag largest magnitude swings as they occur
Given a matrix, return the last eigen value
Multivariate polynomials - convert monomial form to array
Product of two multivariate polynomials
Multivariate polynomials - sort monomials
Multivariate polynomials - emulate symbolic form
Find vampire numbers
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