Commit new solution files for Data Structures

Visit [HackerRank's Data Structures website](https://www.hackerrank.com/domains/data-structures), visit the subdomains and commit new problem solutions at the [repo's Data Structures folder](https://github.com/Kvaibhav01/HackerRank-Solutions/tree/master/Data%20Structures).

### Rules:
1. Solutions must be **correct** (obviously), I will review them before merging.
2. The solution's directory path must be **according to the subdomain** HackerRank provides for Data Structures. Example: _/Data Structures/Subdomain name/Solution.java_ or _/Data Structures/Subdomain name/RelevantFileName.java_
3. Code can be done in any preferred language but **Java and JavaScript are recommended**. Someone who provides the solution in Kotlin/PHP (or any other language except recommended ones) will be considered later.
4. Code should be **formatted properly**. Unformatted code will be disregarded.
5. The solution you submit should be of **your own**.

Start with the linked HackerRank Data Structures page and inspect the repository's Data Structures folder to choose a subdomain and problem. Add an original, correctly formatted solution under the matching subdomain path; completion requires a correct file that is ready for review.

Written by the indexing model from the issue text.