Added iterator approach & give constant arr size to avoid memory error

[theraghavjuneja]

No description provided.

[Kanav-Arora]

Hi @theraghavjuneja
First of all thank you for contributing.
The change you have suggested isn't much required as its not making any change to the time or space complexity. Its not really and optimisation. Use of min_element iterator won't reduce the time.

Moreover the reason I haven't added a limit to arr length is because it depends on the question so I don't want to give a wrong idea.

But thumbs up for the eye for detail. Any other relevant contribution would be appreciated. I recommend if you can change the existing solutions to other languages like Java, Python or something.

Ping me if you need any help!