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48 lines
1.6 KiB
Python
48 lines
1.6 KiB
Python
"""For reference
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https://en.wikipedia.org/wiki/Odd%E2%80%93even_sort
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"""
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def odd_even_sort(input_list: list) -> list:
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"""this algorithm uses the same idea of bubblesort,
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but by first dividing in two phase (odd and even).
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Originally developed for use on parallel processors
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with local interconnections.
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:param collection: mutable ordered sequence of elements
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:return: same collection in ascending order
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Examples:
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>>> odd_even_sort([5 , 4 ,3 ,2 ,1])
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[1, 2, 3, 4, 5]
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>>> odd_even_sort([])
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[]
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>>> odd_even_sort([-10 ,-1 ,10 ,2])
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[-10, -1, 2, 10]
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>>> odd_even_sort([1 ,2 ,3 ,4])
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[1, 2, 3, 4]
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"""
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sorted = False
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while sorted is False: # Until all the indices are traversed keep looping
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sorted = True
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for i in range(0, len(input_list) - 1, 2): # iterating over all even indices
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if input_list[i] > input_list[i + 1]:
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input_list[i], input_list[i + 1] = input_list[i + 1], input_list[i]
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# swapping if elements not in order
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sorted = False
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for i in range(1, len(input_list) - 1, 2): # iterating over all odd indices
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if input_list[i] > input_list[i + 1]:
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input_list[i], input_list[i + 1] = input_list[i + 1], input_list[i]
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# swapping if elements not in order
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sorted = False
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return input_list
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if __name__ == "__main__":
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print("Enter list to be sorted")
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input_list = [int(x) for x in input().split()]
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# inputing elements of the list in one line
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sorted_list = odd_even_sort(input_list)
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print("The sorted list is")
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print(sorted_list)
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