Trees, Binary, Tuples. - Week 4

    Binary trees are very interesting with all their applications, like the ability to use nodes in a queue and such. The exercise was quite straight forward, with the exception of part b in which I kept getting lists within my node lists but a simple list comprehension solved my problem. I managed to solve the exercise without helper functions thanks to tuples, something that I was introduced to this year as I had programmed in java. The usefulness of tuples has actually become very apparent now, it really simplifies things when I can return a small tuple.