correct , in problem first element represent the zeroth element. If you have seen my video without skipping..:) then this doubt should not be there.:)

Tell me honestly, you watched without skipping right?? :)

If yes, and still doubt is there you can comment on my video will happly answer your query there.

Why I am asking you to put your comment on my video because it will help others too who will be having the same doubt in future.