Quick sort VVI

PHOTO EMBED

Sun Jan 29 2023 06:19:55 GMT+0000 (Coordinated Universal Time)

Saved by @Ranjan_kumar #c++ 

#include <bits/stdc++.h>
using namespace std;

int partition(int arr[],int s,int e)
{
   int pivot=arr[s];
   int cnt=0;
   for(int i=s+1;i<=e;i++)
   {
      if(arr[i]<=pivot)
      {
         cnt++;
      }
   }
   
   //place pivot at right position
   int pivotindex = s+cnt;
   swap(arr[pivotindex],arr[s]);
   
   //left and right wala part sambhal lete sambhal
   int i=s, j=e;
   while(i < pivotindex && j > pivotindex)
   {
      while(arr[i]<pivot)
      {
         i++;
      }
      while(arr[j]>pivot)
      {
         j--;
      }
      if(i < pivotindex && j > pivotindex)
      {
         swap(arr[i++],arr[j--]);
      }
   }
   return pivotindex;
}
void quicksort(int arr[], int s,int e)
{
   //base case
   if(s>=e) return;
   
   //partition
   int p=partition(arr,s,e);
   //recursion
   //left part ko sort karo
   quicksort(arr,s,p-1);
   //right part ko sort karo
   quicksort(arr,p+1,e);
}


int main() {
	int a[8]={9,78,6,23,14,2,8,1};
	int n=8;
	quicksort(a,0,n-1);
	for(int i=0;i<n;i++)
	{
	   cout<<a[i]<<" ";
	}
	return 0;
}
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