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# Python program for implementation of Quicksort Sort

# This function takes last element as pivot, places

# the pivot element at its correct position in sorted

# array, and places all smaller (smaller than pivot)

# to left of pivot and all greater elements to right

# of pivot

def partition(arr, low, high):

i = (low-1) # index of smaller element

pivot = arr[high] # pivot

for j in range(low, high):

# If current element is smaller than or

# equal to pivot

if arr[j] <= pivot:

# increment index of smaller element

i = i+1

arr[i], arr[j] = arr[j], arr[i]

arr[i+1], arr[high] = arr[high], arr[i+1]

return (i+1)

# The main function that implements QuickSort

# arr[] --> Array to be sorted,

# low --> Starting index,

# high --> Ending index

# Function to do Quick sort

def quickSort(arr, low, high):

if len(arr) == 1:

return arr

if low < high:

# pi is partitioning index, arr[p] is now

# at right place

pi = partition(arr, low, high)

# Separately sort elements before

# partition and after partition

quickSort(arr, low, pi-1)

quickSort(arr, pi+1, high)

# Driver code to test above

arr = [10, 7, 8, 9, 1, 5]

n = len(arr)

quickSort(arr, 0, n-1)

print("Sorted array is:")

for i in range(n):

print("%d" % arr[i]),

# This code is contributed by Mohit Kumra

#This code in improved by https://github.com/anushkrishnav