Maximize Sum Of Arr[i]*i Of An Array

code.cpp

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

int maximise(vector<int>& arr)
{
    sort(arr.begin(),arr.end());
   
    int ans = 0;
    for(int i=0;i<arr.size();i++)
    {
        ans += arr[i]*i;
    }
    return ans;
}

int main()
{
    int n;
    cin>>n;
    
    vector<int> arr(n,0);
    for(int i=0;i<n;i++)
    {
        cin>>arr[i];
    }
    
    int ans = maximise(arr);
    cout<<ans;
}

snippet.cpp

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

int maximise(vector<int>& arr)
{
    /*Write your code here*/
}

int main()
{
    int n;
    cin>>n;
    
    vector<int> arr(n,0);
    for(int i=0;i<n;i++)
    {
        cin>>arr[i];
    }
    
    int ans = maximise(arr);
    cout<<ans;
}