mirror of
https://github.com/TheAlgorithms/Python.git
synced 2024-11-24 13:31:07 +00:00
40 lines
1.1 KiB
Python
40 lines
1.1 KiB
Python
"""
|
|
This is a pure python implementation of the pancake sort algorithm
|
|
For doctests run following command:
|
|
python3 -m doctest -v pancake_sort.py
|
|
or
|
|
python -m doctest -v pancake_sort.py
|
|
For manual testing run:
|
|
python pancake_sort.py
|
|
"""
|
|
|
|
|
|
def pancake_sort(arr):
|
|
"""Sort Array with Pancake Sort.
|
|
:param arr: Collection containing comparable items
|
|
:return: Collection ordered in ascending order of items
|
|
Examples:
|
|
>>> pancake_sort([0, 5, 3, 2, 2])
|
|
[0, 2, 2, 3, 5]
|
|
>>> pancake_sort([])
|
|
[]
|
|
>>> pancake_sort([-2, -5, -45])
|
|
[-45, -5, -2]
|
|
"""
|
|
cur = len(arr)
|
|
while cur > 1:
|
|
# Find the maximum number in arr
|
|
mi = arr.index(max(arr[0:cur]))
|
|
# Reverse from 0 to mi
|
|
arr = arr[mi::-1] + arr[mi + 1 : len(arr)]
|
|
# Reverse whole list
|
|
arr = arr[cur - 1 :: -1] + arr[cur : len(arr)]
|
|
cur -= 1
|
|
return arr
|
|
|
|
|
|
if __name__ == "__main__":
|
|
user_input = input("Enter numbers separated by a comma:\n").strip()
|
|
unsorted = [int(item) for item in user_input.split(",")]
|
|
print(pancake_sort(unsorted))
|