PULL_REQUEST_TEMPLATE.md

By submitting this pull request I confirm I've read and complied with the below requirements.

• I have read the Contribution guidelines and I am confident that my PR reflects them.
• I have followed the coding guidelines for this project.
• My code follows the skeleton code structure.
• This pull request has a descriptive title. For example, Added {Algorithm/DS name} [{Language}], not Update README.md or Added new code.