Given a list_of_ints, find the highest_product you can get from three of the integers.

The input list_of_ints will always have at least three integers.

Gotchas

Does your function work with negative numbers? If list_of_ints is [−10,−10,1,3,2] we should return 300 (which we get by taking -10 -10 3−10∗−10∗3).