added data structure questions

[Shrutikabansal]

Describe your change:

Added Algorithm related to DynamicPrograming and Backtracking

• Add an algorithm?
• Fix a bug or typo in an existing algorithm?
• Documentation change?

Checklist:

• I have read CONTRIBUTING.md.
• This pull request is all my own work -- I have not plagiarized.
• I know that pull requests will not be merged if they fail the automated tests.
• This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms.
• All new Python files are placed inside an existing directory.
• All filenames are in all lowercase characters with no spaces or dashes.
• All functions and variable names follow Python naming conventions.
• All function parameters and return values are annotated with Python type hints.
• All functions have doctests that pass the automated testing.
• All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation.
• If this pull request resolves one or more open issues then the commit message contains Fixes: #{$ISSUE_NO}.

[cclauss]

Suggested change

	Ouptut 1:
	Output 1:

https://github.com/TheAlgorithms/Python/pull/1845/checks?check_run_id=573851978#step:5:10

[cclauss]

Suggested change

	import math

https://travis-ci.com/github/TheAlgorithms/Python/builds/159594158#L339

[cclauss]

data_structures/Backtracking/sudoku.cpp does not belong in this repoo. It belongs in https://github.com/TheAlgorithms/C-Plus-Plus

[cclauss]

https://github.com/TheAlgorithms/Python/blob/master/Travis_CI_tests_are_failing.md

[cclauss]

This PR should only change one algorithm file. To ease review, please open separate PRs for separate algorithms.

[Shrutikabansal]

"This PR should only change one algorithm file. To ease review, please open separate PRs for separate algorithms." I got this point but why checks are failing

[cclauss]

Why checks are failing?

48    E101 indentation contains mixed spaces and tabs
8     E999 TabError: inconsistent use of tabs and spaces in indentation
8     F821 undefined name 'sys'
56    W191 indentation contains tabs
120

https://github.com/TheAlgorithms/Python/blob/master/Travis_CI_tests_are_failing.md

[Shrutikabansal]

Okay I'll do again and then raise the pr
Thank you so much

[cclauss]

There is a standalone Python file in the CPython distribution called reindent.py that can autofix those pesky tabs... https://github.com/python/cpython/blob/master/Tools/scripts/reindent.py