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Quick Sort

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1. You are given an array(arr) of integers.
2. You have to sort the given array in increasing order using quick-sort.
Input Format
An Integer n 
arr1
arr2..
n integers
Output Format
Check the sample output and question video.
Question Video
Constraints
1 <= N <= 100000
-10^9 <= arr[i] <= 10^9
Sample Input
5
7
-2
4
1
3
Sample Output
pivot -> 3
Swapping -2 and 7
Swapping 1 and 7
Swapping 3 and 4
pivot index -> 2
pivot -> 1
Swapping -2 and -2
Swapping 1 and 1
pivot index -> 1
pivot -> -2
Swapping -2 and -2
pivot index -> 0
pivot -> 4
Swapping 4 and 7
pivot index -> 3
pivot -> 7
Swapping 7 and 7
pivot index -> 4
-2 1 3 4 7


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