Python/sorts/wiggle_sort.py
Guillaume Rochedix f564c9d7c6
Wiggle sort ()
* wiggle sort : type hint + doctest

* fixed function name in docstring

* correction
2020-09-25 09:18:00 +02:00

39 lines
929 B
Python

"""
Wiggle Sort.
Given an unsorted array nums, reorder it such
that nums[0] < nums[1] > nums[2] < nums[3]....
For example:
if input numbers = [3, 5, 2, 1, 6, 4]
one possible Wiggle Sorted answer is [3, 5, 1, 6, 2, 4].
"""
def wiggle_sort(nums: list) -> list:
"""
Python implementation of wiggle.
Example:
>>> wiggle_sort([0, 5, 3, 2, 2])
[0, 5, 2, 3, 2]
>>> wiggle_sort([])
[]
>>> wiggle_sort([-2, -5, -45])
[-45, -2, -5]
>>> wiggle_sort([-2.1, -5.68, -45.11])
[-45.11, -2.1, -5.68]
"""
for i, _ in enumerate(nums):
if (i % 2 == 1) == (nums[i - 1] > nums[i]):
nums[i - 1], nums[i] = nums[i], nums[i - 1]
return nums
if __name__ == "__main__":
print("Enter the array elements:")
array = list(map(int, input().split()))
print("The unsorted array is:")
print(array)
print("Array after Wiggle sort:")
print(wiggle_sort(array))