#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;
    int a[n];
    for(int i=0;i<n;i++)
        cin>>a[i];
    sort(a,a+n);
    long long z=0;
    long long x=1;
    for(int i=n-1;i>=0;i--){
        z=z+(a[i]*x);
        x=x*2;
    }
    cout<<z;
    return 0;
}