Hacktoberfest 2020 🎉🎉🎉

Its that time of the year, make PR's in here for your HacktoberFest Contributions

https://hacktoberfest.digitalocean.com/

Goal

The entire goal of this issue is to get contributions from the open source community to curate a list of interview questions which are solved in Python(3.7 preferred)

Note

• The interview questions can be of any level
• Please do not submit duplicate questions(go through the code base and see if the problem you are submitting exists)
• All questions should have solutions written in python 3.8
• Add tests to test your algorithm inside the root test folder
• View the existing tests for implementation
• PR will be rejected if it does not follow the above rules