#include <cmath>
#include <cstdio>
#include <vector>
#include <iostream>
#include <algorithm>
using namespace std;

long long ans,p,c[50];
int main() {
    /* Enter your code here. Read input from STDIN. Print output to STDOUT */   
    int n;
    cin>>n;
    p=1;
    for(int i=0;i<n;i++)
       cin>>c[i];
    sort(c,c+n);
    for(int i=n-1;i>=0;i--)
        {
        //cin>>c;
        ans+=c[i]*p;
        //cout<<c*p<<endl;
        p*=2;
    }
    cout<<ans;
    return 0;
}