Scan fill

[Ashishshinde2611]

• [ ] Have you ensured that a similar submission does not already exist?
• [ ] Have you tested your code that it works correctly?
• [ ] This PR only adds ONE file
• [ ] My PR satisfies guidelines from CONTRIBUTING.md
• [ ] My file follows proper naming conventions i.e. My Data Structure.cpp

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[SOHAM-GADEKAR]

In your PR you have added your code and deleted a CountSort file, so please just add yours and don't make changes in other files and the PR again.