mirror of
https://github.com/TheAlgorithms/Python.git
synced 2024-11-27 23:11:09 +00:00
59 lines
1.6 KiB
Python
59 lines
1.6 KiB
Python
"""
|
|
Comb sort is a relatively simple sorting algorithm originally designed by Wlodzimierz Dobosiewicz in 1980.
|
|
Later it was rediscovered by Stephen Lacey and Richard Box in 1991. Comb sort improves on bubble sort.
|
|
|
|
This is pure python implementation of comb sort algorithm
|
|
For doctests run following command:
|
|
python -m doctest -v comb_sort.py
|
|
or
|
|
python3 -m doctest -v comb_sort.py
|
|
|
|
For manual testing run:
|
|
python comb_sort.py
|
|
"""
|
|
|
|
def comb_sort(data):
|
|
"""Pure implementation of comb sort algorithm in Python
|
|
:param collection: some mutable ordered collection with heterogeneous
|
|
comparable items inside
|
|
:return: the same collection ordered by ascending
|
|
Examples:
|
|
>>> comb_sort([0, 5, 3, 2, 2])
|
|
[0, 2, 2, 3, 5]
|
|
>>> comb_sort([])
|
|
[]
|
|
>>> comb_sort([-2, -5, -45])
|
|
[-45, -5, -2]
|
|
"""
|
|
shrink_factor = 1.3
|
|
gap = len(data)
|
|
swapped = True
|
|
i = 0
|
|
|
|
while gap > 1 or swapped:
|
|
# Update the gap value for a next comb
|
|
gap = int(float(gap) / shrink_factor)
|
|
|
|
swapped = False
|
|
i = 0
|
|
|
|
while gap + i < len(data):
|
|
if data[i] > data[i+gap]:
|
|
# Swap values
|
|
data[i], data[i+gap] = data[i+gap], data[i]
|
|
swapped = True
|
|
i += 1
|
|
|
|
return data
|
|
|
|
|
|
if __name__ == '__main__':
|
|
try:
|
|
raw_input # Python 2
|
|
except NameError:
|
|
raw_input = input # Python 3
|
|
|
|
user_input = raw_input('Enter numbers separated by a comma:\n').strip()
|
|
unsorted = [int(item) for item in user_input.split(',')]
|
|
print(comb_sort(unsorted))
|