#include <bits/stdc++.h>

using namespace std;

int main(){
    int n;
    cin >> n;
    int c[n];
    for(int calories_i = 0; calories_i < n; calories_i++){
       cin >> c[calories_i];
    }
    sort(c,c+n,greater<int>());
    long int count=1;
    long int res=0;
    for(int i=0;i<n;i++)
        {
        res+=c[i]*count;
        count*=2;
    }
    cout<<res;
    return 0;
}