Operations on Array

//dsc(DEEPANSHU SINGH CHAUHAN)

#include <bits/stdc++.h>
using namespace std;
#define ll long long int

int main()
{
    ll n,s=0;
    cin>>n  ;  //Size of Array
    ll a[n];
    for(int i=0;i<n;i++)
    {
        cin>>a[i];
    }
    ll index1,index2;
    cin>>index1>>index2;
    sort(a+index1,a+index2+1);
    cout<<"Minimum Value:"<<a[index1]<<endl;
    cout<<"Maximum Value:"<<a[index2]<<endl;
    for(int i=index1;i<=index2;i++)
    {
        s=s+a[i];
        a[i]=a[i]+4;
    }
    cout<<"Sum:"<<s<<endl;
    cout<<"Updated Array:"<<endl;
    for(int i=0;i<n;i++)
    {
        cout<<a[i]<<" ";
    }
    cout<<endl;

    return 0;
}

/*
Time Complexity of this method in Worst case wouls be
O(nlogn+n) 
*/