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sorts/cyclic_sort.py
55 строк
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Sharan Sukesh
Create cyclic_sort.py (#9256)
26 авг 2025, 21:42
Не верифицирован
26 авг 2025, 21:42
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""" This is a pure Python implementation of the Cyclic Sort algorithm. For doctests run following command: python -m doctest -v cyclic_sort.py or python3 -m doctest -v cyclic_sort.py For manual testing run: python cyclic_sort.py or python3 cyclic_sort.py """ def cyclic_sort(nums: list[int]) -> list[int]: """ Sorts the input list of n integers from 1 to n in-place using the Cyclic Sort algorithm. :param nums: List of n integers from 1 to n to be sorted. :return: The same list sorted in ascending order. Time complexity: O(n), where n is the number of integers in the list. Examples: >>> cyclic_sort([]) [] >>> cyclic_sort([3, 5, 2, 1, 4]) [1, 2, 3, 4, 5] """ # Perform cyclic sort index = 0 while index < len(nums): # Calculate the correct index for the current element correct_index = nums[index] - 1 # If the current element is not at its correct position, # swap it with the element at its correct index if index != correct_index: nums[index], nums[correct_index] = nums[correct_index], nums[index] else: # If the current element is already in its correct position, # move to the next element index += 1 return nums if __name__ == "__main__": import doctest doctest.testmod() user_input = input("Enter numbers separated by a comma:\n").strip() unsorted = [int(item) for item in user_input.split(",")] print(*cyclic_sort(unsorted), sep=",")