mirror of
https://github.com/TheAlgorithms/Python.git
synced 2024-12-18 09:10:16 +00:00
48 lines
1.6 KiB
Python
48 lines
1.6 KiB
Python
|
"""For reference
|
||
|
|
https://en.wikipedia.org/wiki/Odd%E2%80%93even_sort
|
||
|
|
"""
|
||
|
|
|
||
|
|
|
||
|
|
def odd_even_sort(input_list: list) -> list:
|
||
|
|
"""this algorithm uses the same idea of bubblesort,
|
||
|
|
but by first dividing in two phase (odd and even).
|
||
|
|
Originally developed for use on parallel processors
|
||
|
|
with local interconnections.
|
||
|
|
:param collection: mutable ordered sequence of elements
|
||
|
|
:return: same collection in ascending order
|
||
|
|
Examples:
|
||
|
|
>>> odd_even_sort([5 , 4 ,3 ,2 ,1])
|
||
|
|
[1, 2, 3, 4, 5]
|
||
|
|
>>> odd_even_sort([])
|
||
|
|
[]
|
||
|
|
>>> odd_even_sort([-10 ,-1 ,10 ,2])
|
||
|
|
[-10, -1, 2, 10]
|
||
|
|
>>> odd_even_sort([1 ,2 ,3 ,4])
|
||
|
|
[1, 2, 3, 4]
|
||
|
|
"""
|
||
|
|
sorted = False
|
||
|
|
while sorted is False: # Until all the indices are traversed keep looping
|
||
|
|
sorted = True
|
||
|
|
for i in range(0, len(input_list) - 1, 2): # iterating over all even indices
|
||
|
|
if input_list[i] > input_list[i + 1]:
|
||
|
|
|
||
|
|
input_list[i], input_list[i + 1] = input_list[i + 1], input_list[i]
|
||
|
|
# swapping if elements not in order
|
||
|
|
sorted = False
|
||
|
|
|
||
|
|
for i in range(1, len(input_list) - 1, 2): # iterating over all odd indices
|
||
|
|
if input_list[i] > input_list[i + 1]:
|
||
|
|
input_list[i], input_list[i + 1] = input_list[i + 1], input_list[i]
|
||
|
|
# swapping if elements not in order
|
||
|
|
sorted = False
|
||
|
|
return input_list
|
||
|
|
|
||
|
|
|
||
|
|
if __name__ == "__main__":
|
||
|
|
print("Enter list to be sorted")
|
||
|
|
input_list = [int(x) for x in input().split()]
|
||
|
|
# inputing elements of the list in one line
|
||
|
|
sorted_list = odd_even_sort(input_list)
|
||
|
|
print("The sorted list is")
|
||
|
|
print(sorted_list)
|