🤩 Add Data Structures Code in C++

[sudo-parnab]

Description:

We invite contributions of data structures implemented in C++. Popular data structures like Heaps, Hash Maps, Graphs, and more are welcome in this language.

Requirements:

• Use C++ Standard Template Library (STL) wherever possible for clean and efficient code.
• Provide detailed comments and documentation for better clarity.
• Share examples of how the data structure can be used with a sample main function.

Contributing to this will help others understand C++ implementations of essential data structures!

[farhan-sayeed]

@sudo-parnab pls assign this to me

[sudo-parnab]

open a new issue according to your code