DFS(easier approach) - Githubissues

DFS technique mentioned in this repo was little bit complicated. I have tried to mention a easier approach using vector and array.

[x] Added description of change
[x] Added file name matches File name guidelines
[x] Added documentation so that the program is self-explanatory and educational - Doxygen guidelines
[x] Relevant documentation/comments is changed or added
[x] PR title follows semantic commit guidelines
[x] Search previous suggestions before making a new one, as yours may be a duplicate.
[x] I acknowledge that all my contributions will be made under the project's license.

Notes:

TheAlgorithms / C-Plus-Plus