Add More Files (Sorting, Backtracking, list)

[sourav2002]

I want to contribute to this open-resource. I checked a lot of algorithms and concepts related to Sorting, Dynamic Programming, and more. This is very helpful for everybody. I want to add some more Important Algorithm for sorting, String.

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[stale]

Please reopen this issue once you add more information and updates here. If this is not the case and you need some help, feel free to seek help from our Gitter or ping one of the reviewers. Thank you for your contributions!