"""
Picks the random index as the pivot
"""
import random
def partition(A, left_index, right_index):
pivot = A[left_index]
i = left_index + 1
for j in range(left_index + 1, right_index):
if A[j] < pivot:
A[j], A[i] = A[i], A[j]
i += 1
A[left_index], A[i - 1] = A[i - 1], A[left_index]
return i - 1
def quick_sort_random(A, left, right):
if left < right:
pivot = random.randint(left, right - 1)
A[pivot], A[left] = (
A[left],
A[pivot],
)
pivot_index = partition(A, left, right)
quick_sort_random(
A, left, pivot_index
)
quick_sort_random(
A, pivot_index + 1, right
)
def main():
user_input = input("Enter numbers separated by a comma:\n").strip()
arr = [int(item) for item in user_input.split(",")]
quick_sort_random(arr, 0, len(arr))
print(arr)
if __name__ == "__main__":
main()