Add solution for finding single non-duplicate element using binary search

[SaurabhKumar171]

Problem:

• Added a solution for finding the single non-duplicate element in a sorted array where every other element appears twice.
• Solved in O(log n) time complexity using binary search.

Changes:

• Added Java implementation for solving the problem.

[github-actions]

🎉 Thank you for your contribution! Your pull request has been submitted successfully. A maintainer will review it as soon as possible. We appreciate your support in making this project better

[Ayu-hack]

Please share the screenshot of working, to get it merged.

[SaurabhKumar171]

@Ayu-hack , Please find below the screenshot of the ouput

[Ayu-hack]

Great Work !
Merged. More repos are available for pull requests, and they’re part of Hacktoberfest 2024.
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[SaurabhKumar171]

Thanks for merging the PRs! Excited for more contributions during Hacktoberfest 2024. I’ll follow you on GitHub and connect on LinkedIn. Will tag you when I post about the badges and certificate! 😄