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

int main(){
    int n;
    cin >> n;
    int a[10000];
    for(int i = 0; i < n; i++){
       cin >> a[i];
    }
    sort(a,a+n);
    // your code goes here
    ll ans=0;
    ll k=1;
    for(int i=n-1;i>=0;i--)
    {
        ans+=(a[i]*k);
        k=k*2;
    }
    cout<<ans;
    return 0;
}