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adding a combinatorics folder with basic algorithms #11398

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@meg-1 meg-1 commented May 10, 2024

Describe your change:

adding a combinatorics folder with basic combinatorics algorithms:

  • multiset combinations
  • combinations with repititions
  • permutations
  • selections
  • derangements
  • stirling numbers of the second kind
  • Add an algorithm?
  • Fix a bug or typo in an existing algorithm?
  • Add or change doctests? -- Note: Please avoid changing both code and tests in a single pull request.
  • 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.
  • [x ] 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 include at least one URL that points to Wikipedia or another similar explanation.
  • If this pull request resolves one or more open issues then the description above includes the issue number(s) with a closing keyword: "Fixes #ISSUE-NUMBER".

@algorithms-keeper algorithms-keeper bot added the tests are failing Do not merge until tests pass label May 10, 2024
@algorithms-keeper algorithms-keeper bot added the require tests Tests [doctest/unittest/pytest] are required label May 10, 2024
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Click here to look at the relevant links ⬇️

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from math import comb
from math import factorial

def validate_elements_count(total_elements_count: int, selected_elements_count: int) -> None:

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As there is no test file in this pull request nor any test function or class in the file combinatorics/combinations.py, please provide doctest for the function validate_elements_count

"""


def validate_elements_count(

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As there is no test file in this pull request nor any test function or class in the file combinatorics/stirling_second_kind.py, please provide doctest for the function validate_elements_count

@algorithms-keeper algorithms-keeper bot added the awaiting reviews This PR is ready to be reviewed label May 10, 2024
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