Crypt.ex

defmodule Crypt do
    def encrypt(numbers) do
        min = Enum.min(numbers)
        (product(numbers, 1)/min)*(min + 1)
    end
    def product([h|t],res), do: product(t, res * h)
    def product([],res), do: res
end

IO.puts to_string(Crypt.encrypt([1,2,3]))