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Commit 9d52683

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anant-jain01pre-commit-ci[bot]MaximSmolskiy
authored
Create stalin_sort.py (#11989)
* Create stalin_sort.py * [pre-commit.ci] auto fixes from pre-commit.com hooks for more information, see https://pre-commit.ci * Update stalin_sort.py * updating DIRECTORY.md * Update stalin_sort.py --------- Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com> Co-authored-by: Maxim Smolskiy <mithridatus@mail.ru> Co-authored-by: MaximSmolskiy <MaximSmolskiy@users.noreply.github.com>
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‎DIRECTORY.md

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* [Shell Sort](sorts/shell_sort.py)
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* [Shrink Shell Sort](sorts/shrink_shell_sort.py)
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* [Slowsort](sorts/slowsort.py)
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* [Stalin Sort](sorts/stalin_sort.py)
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* [Stooge Sort](sorts/stooge_sort.py)
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* [Strand Sort](sorts/strand_sort.py)
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* [Tim Sort](sorts/tim_sort.py)

‎sorts/stalin_sort.py

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"""
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Stalin Sort algorithm: Removes elements that are out of order.
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Elements that are not greater than or equal to the previous element are discarded.
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Reference: https://medium.com/@kaweendra/the-ultimate-sorting-algorithm-6513d6968420
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"""
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def stalin_sort(sequence: list[int]) -> list[int]:
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"""
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Sorts a list using the Stalin sort algorithm.
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>>> stalin_sort([4, 3, 5, 2, 1, 7])
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[4, 5, 7]
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>>> stalin_sort([1, 2, 3, 4])
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[1, 2, 3, 4]
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>>> stalin_sort([4, 5, 5, 2, 3])
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[4, 5, 5]
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>>> stalin_sort([6, 11, 12, 4, 1, 5])
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[6, 11, 12]
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>>> stalin_sort([5, 0, 4, 3])
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[5]
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>>> stalin_sort([5, 4, 3, 2, 1])
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[5]
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>>> stalin_sort([1, 2, 3, 4, 5])
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[1, 2, 3, 4, 5]
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>>> stalin_sort([1, 2, 8, 7, 6])
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[1, 2, 8]
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"""
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result = [sequence[0]]
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for element in sequence[1:]:
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if element >= result[-1]:
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result.append(element)
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return result
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if __name__ == "__main__":
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import doctest
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doctest.testmod()

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