mathdatech/Python
1
0
Fork 0
mirror of https://github.com/TheAlgorithms/Python.git synced 2025-01-30 14:13:44 +00:00
Code Issues Packages Projects Releases Wiki Activity

Update adaptive_merge_sort.py

Browse Source
This commit is contained in:
ANANT JAIN 2024-10-17 12:21:53 +05:30 committed by GitHub
parent 723ab7faf0
commit 0eaeffbcf8
No known key found for this signature in database
GPG Key ID: B5690EEEBB952194
1 changed files with 7 additions and 42 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

49
sorts/adaptive_merge_sort.py
View File

@ -1,20 +1,4 @@
def adaptive_merge_sort(sequence: list) -> list:
"""
Sorts a list using the Adaptive Merge Sort algorithm.
>>> adaptive_merge_sort([4, 3, 1, 2])
Initial sequence: [4, 3, 1, 2]
Sorting: array[0:2] and array[2:4]
Sorting: array[0:1] and array[1:2]
Merging: array[0:1] and array[1:2]
After merge: [3, 4]
Sorting: array[2:3] and array[3:4]
Skipping merge as array[2] <= array[3]
Merging: array[0:2] and array[2:4]
After merge: [1, 2, 3, 4]
Sorted sequence: [1, 2, 3, 4]
[1, 2, 3, 4]
"""
if len(sequence) < 2:
return sequence
@ -26,19 +10,6 @@ def adaptive_merge_sort(sequence: list) -> list:
def adaptive_merge_sort_helper(array: list, aux: list, low: int, high: int) -> None:
"""
Helper function for Adaptive Merge Sort algorithm.
>>> adaptive_merge_sort_helper([4, 3, 1, 2], [4, 3, 1, 2], 0, 3)
Sorting: array[0:2] and array[2:4]
Sorting: array[0:1] and array[1:2]
Merging: array[0:1] and array[1:2]
After merge: [3, 4]
Sorting: array[2:3] and array[3:4]
Skipping merge as array[2] <= array[3]
Merging: array[0:2] and array[2:4]
After merge: [1, 2, 3, 4]
"""
if high <= low:
return
@ -57,23 +28,17 @@ def adaptive_merge_sort_helper(array: list, aux: list, low: int, high: int) -> N
def merge(array: list, aux: list, low: int, mid: int, high: int) -> None:
"""
Merges two sorted subarrays of the main array.
>>> merge([4, 3, 1, 2], [4, 3, 1, 2], 0, 1, 3)
Merging: array[0:2] and array[2:4]
After merge: [1, 2, 3, 4]
"""
print(f"Merging: array[{low}:{mid + 1}] and array[{mid + 1}:{high + 1}]")
i, j = low, mid + 1
for k in range(low, high + 1):
if i > mid:
aux[k] = array[j]
j += 1
elif j > high:
aux[k] = array[i]
i += 1
if i > mid or j > high:
if i > mid:
aux[k] = array[j]
j += 1
else:
aux[k] = array[i]
i += 1
elif array[i] <= array[j]:
aux[k] = array[i]
i += 1