Updating the Python codes to reduce the time complexity

[emnikhil]

Hi I am planning to update the Python and C++ Codes.
I can work on reducing the time complexity of all the 30 problems.
So, please assign this to me.

[rahulsain]

Hey, @nikkkhil067 someone is already assigned for C++, but you can contribute in Python.
Looking forward for your valuable contribution.

[emnikhil]

Thanks I will start contributing now.

[rahulsain]

@nikkkhil067 Are you still working on it?

[emnikhil]

Yes, will be finished updating today

[rahulsain]

Yes, will be finished updating today

@nikkkhil067 when you're done close this issue too

[emnikhil]

Done Updating!