def parttion(v, left, right):
key = v[left]
low = left
high = right
while low < high:
while (low < high) and (v[high] >= key):
high -= 1
v[low] = v[high]
while (low < high) and (v[low] <= key):
low += 1
v[high] = v[low]
v[low] = key
return low
def quicksort(v, left, right):
if left < right:
p = parttion(v, left, right)
quicksort(v, left, p-1)
quicksort(v, p+1, right)
return v
s = [6, 8, 1, 4, 3, 9, 5, 4, 11, 2, 2, 15, 6]
print("before sort:",s)
s1 = quicksort(s, left = 0, right = len(s) - 1)
print("after sort:",s1)
before sort: [6, 8, 1, 4, 3, 9, 5, 4, 11, 2, 2, 15, 6] after sort: [1, 2, 2, 3, 4, 4, 5, 6, 6, 8, 9, 11, 15]
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