#include<bits/stdc++.h>

using namespace std;

int main()
{
    int n;
    cin>>n;
    vector<int> cupcake;
    for(int i=0;i<n;++i)
    {
        int temp;
        cin>>temp;
        cupcake.push_back(temp);
    }
    sort(cupcake.begin(),cupcake.end());
    long sum=0;
    int c=n-1;;
    for(int i=0;i<n;++i)
    {
        sum+=cupcake[i]*pow(2,c);
        --c;
    }
    cout<<sum;
    return 0;
}