Python/sorts/quick_sort_3_partition.py
Christian Clauss 47a9ea2b0b
Simplify code by dropping support for legacy Python (#1143)
* Simplify code by dropping support for legacy Python

* sort() --> sorted()
2019-08-19 15:37:49 +02:00

25 lines
769 B
Python

def quick_sort_3partition(sorting, left, right):
if right <= left:
return
a = i = left
b = right
pivot = sorting[left]
while i <= b:
if sorting[i] < pivot:
sorting[a], sorting[i] = sorting[i], sorting[a]
a += 1
i += 1
elif sorting[i] > pivot:
sorting[b], sorting[i] = sorting[i], sorting[b]
b -= 1
else:
i += 1
quick_sort_3partition(sorting, left, a - 1)
quick_sort_3partition(sorting, b + 1, right)
if __name__ == '__main__':
user_input = input('Enter numbers separated by a comma:\n').strip()
unsorted = [ int(item) for item in user_input.split(',') ]
quick_sort_3partition(unsorted,0,len(unsorted)-1)
print(unsorted)