* Fix type annotations for linked_stack.py
* Replace Optional with inline union type
* Rename linked_stack to stack_with_singly_linked_list
* Rename stack_using_dll to stack_with_doubly_linked_list
* updating DIRECTORY.md
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* [mypy] Fix type annotation in euler_method.py
In line with issue #4052.
* updating DIRECTORY.md
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* New solution for Euler problem 67
A faster and memory efficient solution based on the template of sol1.py.
Modified the solution to be more memory efficient while reading and generating the array
and during the solution finding.
No conditions and straightforward logic.
* added return type hint
* Update project_euler/problem_067/sol2.py
Preferring comprehensions over map
Co-authored-by: Christian Clauss <cclauss@me.com>
* Update sol2.py
Self explanatory variable names
* Updated sol2 to problem 067 in directory
* Update project_euler/problem_067/sol2.py
Co-authored-by: Christian Clauss <cclauss@me.com>
* Update project_euler/problem_067/sol2.py
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* Fixed extra line
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* 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
* updating DIRECTORY.md
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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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Co-authored-by: John Law <johnlaw.po@gmail.com>
* 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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Co-authored-by: Aniruddha Bhattacharjee <aniruddha@Aniruddhas-MacBook-Air.local>
* 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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Co-authored-by: Dhruv Manilawala <dhruvmanila@gmail.com>
* 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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Co-authored-by: John Law <johnlaw.po@gmail.com>
* 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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