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


int main() {
    int n,a[100],i,j;
    long long res=0,cur=1;
    cin>>n;
    for(i=1;i<=n;i++)
        cin>>a[i];
    sort(a+1,a+n+1);
    
    for(i=n;i>=1;i--){
        res+=cur*a[i];
        cur*=2;
    }
    cout<<res<<endl;
    return 0;
}