Add More Code related to topics with explanation

[version0chiro]

What to do:

• Try adding more important questions of specific topics mentioned in the repository
• Try adding an explanation readme file with the codes

[sagar-monga]

Hi, I am interested to add the code and explanation for Floyd's Cycle Detection Algorithm in Linked Lists.
Can it be assigned to me?

[version0chiro]

Yes sure Sagar 👏

[akankshatyagiat]

Hi @version0chiro,
I am interested in adding code for add 2 numbers in LinkedList.
Can you please assign it to me?

[version0chiro]

Go ahead @akankshatyagiat