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119 lines
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119 lines
5.3 KiB
Markdown
# Project Euler
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Problems are taken from https://projecteuler.net/, the Project Euler. [Problems are licensed under CC BY-NC-SA 4.0](https://projecteuler.net/copyright).
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Project Euler is a series of challenging mathematical/computer programming problems that require more than just mathematical
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insights to solve. Project Euler is ideal for mathematicians who are learning to code.
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The solutions will be checked by our [automated testing on Travis CI](https://travis-ci.com/github/TheAlgorithms/Python/pull_requests) with the help of [this script](https://github.com/TheAlgorithms/Python/blob/master/scripts/validate_solutions.py). The efficiency of your code is also checked. You can view the top 10 slowest solutions on Travis CI logs (under `slowest 10 durations`) and open a pull request to improve those solutions.
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## Solution Guidelines
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Welcome to [TheAlgorithms/Python](https://github.com/TheAlgorithms/Python)! Before reading the solution guidelines, make sure you read the whole [Contributing Guidelines](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md) as it won't be repeated in here. If you have any doubt on the guidelines, please feel free to [state it clearly in an issue](https://github.com/TheAlgorithms/Python/issues/new) or ask the community in [Gitter](https://gitter.im/TheAlgorithms). You can use the [template](https://github.com/TheAlgorithms/Python/blob/master/project_euler/README.md#solution-template) we have provided below as your starting point but be sure to read the [Coding Style](https://github.com/TheAlgorithms/Python/blob/master/project_euler/README.md#coding-style) part first.
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### Coding Style
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* Please maintain consistency in project directory and solution file names. Keep the following points in mind:
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* Create a new directory only for the problems which do not exist yet.
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* If you create a new directory, please create an empty `__init__.py` file inside it as well.
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* Please name the project **directory** as `problem_<problem_number>` where `problem_number` should be filled with 0s so as to occupy 3 digits. Example: `problem_001`, `problem_002`, `problem_067`, `problem_145`, and so on.
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* Please provide a link to the problem and other references, if used, in the **module-level docstring**.
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* All imports should come ***after*** the module-level docstring.
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* You can have as many helper functions as you want but there should be one main function called `solution` which should satisfy the conditions as stated below:
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* It should contain positional argument(s) whose default value is the question input. Example: Please take a look at [Problem 1](https://projecteuler.net/problem=1) where the question is to *Find the sum of all the multiples of 3 or 5 below 1000.* In this case the main solution function will be `solution(limit: int = 1000)`.
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* When the `solution` function is called without any arguments like so: `solution()`, it should return the answer to the problem.
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* Every function, which includes all the helper functions, if any, and the main solution function, should have `doctest` in the function docstring along with a brief statement mentioning what the function is about.
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* There should not be a `doctest` for testing the answer as that is done by our Travis CI build using this [script](https://github.com/TheAlgorithms/Python/blob/master/project_euler/validate_solutions.py). Keeping in mind the above example of [Problem 1](https://projecteuler.net/problem=1):
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```python
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def solution(limit: int = 1000):
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"""
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A brief statement mentioning what the function is about.
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You can have a detailed explanation about the solution method in the
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module-level docstring.
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>>> solution(1)
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...
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>>> solution(16)
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...
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>>> solution(100)
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...
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"""
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```
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### Solution Template
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You can use the below template as your starting point but please read the [Coding Style](https://github.com/TheAlgorithms/Python/blob/master/project_euler/README.md#coding-style) first to understand how the template works.
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Please change the name of the helper functions accordingly, change the parameter names with a descriptive one, replace the content within `[square brackets]` (including the brackets) with the appropriate content.
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```python
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"""
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Project Euler Problem [problem number]: [link to the original problem]
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... [Entire problem statement] ...
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... [Solution explanation - Optional] ...
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References [Optional]:
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- [Wikipedia link to the topic]
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- [Stackoverflow link]
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...
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"""
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import module1
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import module2
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...
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def helper1(arg1: [type hint], arg2: [type hint], ...) -> [Return type hint]:
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"""
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A brief statement explaining what the function is about.
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... A more elaborate description ... [Optional]
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...
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[Doctest]
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...
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"""
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...
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# calculations
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...
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return
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# You can have multiple helper functions but the solution function should be
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# after all the helper functions ...
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def solution(arg1: [type hint], arg2: [type hint], ...) -> [Return type hint]:
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"""
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A brief statement mentioning what the function is about.
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You can have a detailed explanation about the solution in the
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module-level docstring.
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...
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[Doctest as mentioned above]
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...
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"""
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...
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# calculations
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...
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return answer
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if __name__ == "__main__":
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print(f"{solution() = }")
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```
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