099 [c++] - Githubissues

Fixes #{ISSUE_NUMBER}

[x] Pull Request Title is of form Problem Number [Language].
[x] This problem already had an entry in this repository.
[x] This solution is better than the one already in this repository.
[x] This solution is prepared by me and not copied from anywhere else on the web.
[x] I have added a BY:{Your Hackerrank username} copyright comment in my solution.
[x] I have updated index.md file (In appropriate folder in the appropriate manner).
[x] I understand that pull request will be closed if I failed to update it even once in a week.

vaibhav29498 / HackerrankProjectEuler