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


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