99 Elm Problems/Problem 67

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67.a) Generate a string representation of a binary tree like the following. a(b(d,e),c(,f(g,)))

68.b) Generate a tree from such a string representation. Be able to handle an ill-formed string.

# # # 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))