Hi, I am really sorry to disapprove this contribution but we see it as not a good candidate for the reward in Utopian.

Tutorials must be technical instructions that teach non-trivial aspects of an Open Source project.

[...] basic programming concepts (variables, operators, loops, etc.) will not be accepted.

The topic about ADT is not simple in general, yet it is more about programming principles and they are not language specific.

The implementation of the data structure is quite simple in Python.

I would also say that you do not need to write 3 very similar examples of the code but write one and print the states in it.

You can contact us on Discord.
[utopian-moderator]