Update CONTRIBUTORS.md

Author: nitishtw

CONTRIBUTORS.md

@@ -17,3 +17,4 @@ Thanks for all your contributions :heart: :octocat:
 |[Abhishek Nalla](https://github.com/abhisheknalla)| [#129](https://github.com/codeIIEST/Algorithms/pull/129) ,[#147](https://github.com/codeIIEST/Algorithms/pull/147) [#204](https://github.com/codeIIEST/Algorithms/pull/204)| MERGED |
 | [Zanark ( Debashish Mishra )](https://github.com/Zanark) | [PR #222](https://github.com/codeIIEST/Algorithms/pull/222) , [PR #146](https://github.com/codeIIEST/Algorithms/pull/146) , [PR #135](https://github.com/codeIIEST/Algorithms/pull/135) | OPEN , MERGED , CLOSED|
 | [d3v3sh5ingh](https://github.com/D3v3sh5ingh) | [PR #126](https://github.com/codeIIEST/Algorithms/pull/126) , [PR #161](https://github.com/codeIIEST/Algorithms/pull/161) | Closed , MERGED|
+|[AdvikEshan( Nitish Kumar Tiwari )](https://github.com/AdvikEshan)|[PR #97](https://github.com/codeIIEST/Algorithms/pull/97),[PR #192](https://github.com/codeIIEST/Algorithms/pull/192), [PR #258](https://github.com/codeIIEST/Algorithms/pull/258)|Merged,Merged,Merged|