items = [23, 15, 29, 11, 44, 39, 56, 48, 52, 78, 87, 62, 50]
def quicksort(dataset, first, last):
if first < last:
pivotIdx = partition(dataset, first, last)
quicksort(dataset, first, pivotIdx -1)
quicksort(dataset, pivotIdx + 1, last)
def partition(data, first, last):
pivotvalue = data[first]
lower = first + 1
upper = last
done = False
while not done:
while lower <= upper and data[lower] <= pivotvalue:
lower += 1
while upper >= lower and data[upper] >= pivotvalue:
upper -= 1
if upper < lower:
done = True
else:
temp = data[lower]
data[lower] = data[upper]
data[upper] = temp
temp = data[first]
data[first] = data[upper]
data[upper] = temp
return upper
print(items)
quicksort(items, 0, len(items) - 1)
print(items)
