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


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