This will allow students to navigate the repo structure easily, without having to come back to the main repo each time.

Similar type code directories should be placed inside a parent directory. Example:
Many code directories are just algorithms, they can be placed inside a parent directory with name algorithms.

Solve day 1 of October LeetCode challenge

you can add any missing Data-structures, Algorithms, or Programs for hacktoberfest 2020.
please read README.md first

https://leetcode.com/problems/number-of-islands/
https://www.youtube.com/watch?v=vxhGsZWJRH4

Currently, solutions have been posted in C++ and Python. Before commenting, do read the Contributing guidelines from README.md