* Financial: principle -> principal
The originally invested amount of money: `principal`
-- https://www.grammarly.com/blog/principle-principal/
* updating DIRECTORY.md
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* Fix validate_initial_digits of credit_card_validator.py
@Bhargavishnu I think that I broke the logic of validate_initial_digits which should require that credit_card_number[0] is 3 before checking that credit_card_number[1] is 4, 5, or 7. Please verify the new changes and the new test cases to make sure that this is correct. Thanks!
* updating DIRECTORY.md
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* fix: fix mypy errors
Update binary_search_tree `arr` argument to be typed as a list
within `find_kth_smallest` function
Update return type of `merge_two_binary_trees` as both inputs can
be None which means that a None type value can be returned from
this function
* updating DIRECTORY.md
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* Remove exception detail from doctest
These details are configuration dependant so should be removed according to https://docs.python.org/3/library/doctest.html
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* Update and rename check_valid_ip_address.py to is_ip_v4_address_valid.py
New test cases that the algorithm must detect:
* [ ] an octet much bigger than 255
* [ ] an octet is negative
* [ ] number of octets is less than 4
* [ ] number of octets is greater than 4
* [ ] an octet is a letter
* updating DIRECTORY.md
* Add two more tests to is_ip_v4_address_valid.py
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* boruvka.py: A few simplifications and f-strings
Python f-strings simplify the code and [should speed up execution](https://www.scivision.dev/python-f-string-speed).
@srkchowdary2000 Your review, please.
* updating DIRECTORY.md
* fixup! Streamline the test
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* Added the matrix_exponentiation.py file in maths directory
* Implemented the requested changes
* Update matrix_exponentiation.py
* resolve merge conflict with upstream branch
* add new line at end of file
* add wavelet_tree
* fix isort issue
* updating DIRECTORY.md
* fix variable names in wavelet_tree and correct typo
* Add type hints and variable renaming
* Update data_structures/binary_tree/wavelet_tree.py
Add doctests to placate the algorithm-bot, thanks to @cclauss.
Co-authored-by: Christian Clauss <cclauss@me.com>
* Move doctest to individual functions and reformat code
* Move common test array to the global scope and reuse in tests
* MMove test array to global scope and minor linting changes
* Correct the failing pytest tests
* MUse built-in list for type annotation
* Update wavelet_tree.py
* types-requests
* updating DIRECTORY.md
* Update wavelet_tree.py
* # type: ignore
* # type: ignore
* Update decrypt_caesar_with_chi_squared.py
* ,
* Update decrypt_caesar_with_chi_squared.py
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* Hacktoberfest: Add greedy_coin_change.py file
added the file in greedy_methods folder to implement the same method
Altered the code according to the changes that were requested.
* Added doctests.
doctests added to the function find_minimum_change.
* Added Greedy change file in Maths folder.
* updating DIRECTORY.md
* Deleted Greedy Method Folder
* updating DIRECTORY.md
* Update greedy_coin_change.py
* fix: black formatting issues
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* GitHub Actions: fast-fail on black formatting issues
Give fast feedback to contributors https://github.com/psf/black#github-actions
* updating DIRECTORY.md
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* Add graham scan algorithm
* Fix argument name p with point
* Add tests in inner function
* updating DIRECTORY.md
* Fix graham scan for isort --profile=black
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* Added solution for Project Euler problem 107
* Doctests and better variable names
* Type hints
* Small edits
* Forward reference for typing hint
* updating DIRECTORY.md
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* Added solution for Project Euler problem 59
* updating DIRECTORY.md
* Formatting, type hints, no more evil map functions
* Doctests
* Added doctests for Project Euler problem 59
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* Added solution for Project Euler problem 085.
* updating DIRECTORY.md
* Minor tweaks to Project Euler problem 85
* Variable comments for project euler problem 85
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* Added solution for Project Euler problem 180
* Fixed minor details in Project Euler problem 180
* updating DIRECTORY.md
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* Added static typing to backtracking algorithms
* Ran psf/black to fix some minor issues.
* updating DIRECTORY.md
* updating DIRECTORY.md
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* Added solution for Project Euler problem 77.
* Update docstrings, doctest, type annotations and 0-padding in directory name. Reference: #3256
* Implemented lru_cache, better type hints, more doctests for problem 77
* updating DIRECTORY.md
* updating DIRECTORY.md
* Added solution for Project Euler problem 77. Fixes: 2695
* Update docstrings, doctest, type annotations and 0-padding in directory name. Reference: #3256
* Implemented lru_cache, better type hints, more doctests for problem 77
* better variable names
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* add solution for euler problem 89
* updates to accommodate euler solution guideline updates
* use more descriptive vars
* updating DIRECTORY.md
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* Add type hints, documentation and tests.
* Update searches/ternary_search.py
Sort collection and remove the assertion logic.
Co-authored-by: Christian Clauss <cclauss@me.com>
* Remove assert sorted logic.
* Add assertion list is ordered.
* updating DIRECTORY.md
* updating DIRECTORY.md
* Format with black.
* Change names of variables to descriptive names
* Remove print in doctests
* Fix variables to snake_case notation.
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