99 Elm Problems/Problem 72
Given a tree, construct the bottom-up order sequence of the tree nodes. In bottom-up sequence all child nodes must be shown before any of its parent nodes. The bottom-up sequence of tree5 is "gfcdeba"
# # # THIS IS A STUB # # #
Example in Elm:
import Html exposing (text) import List f : Int -> Int -- your implementation goes here main = text (toString (f 0))