Add any 4 (easy-medium-Hard) questions from CodeChef

[aayush89890]

Add any one easy question from CodeChef

[div-sahu55]

I would like to work on this please.

[mohitsaxenaknoldus]

I've joined the org. I will raise a PR for this soon.

[UnnatKr]

@aayush89890 I would like to work on this

[mohitsaxenaknoldus]

@adityamangal1 My other PR is already merged in this repo so you can assign this to someone else.