#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;
    unsigned long long int * arr = new unsigned long long int[n];
    
    for(int i = 0; i < n; i++){
        cin >> arr[i];
    }
    sort(arr , arr + n);
    unsigned long long int ans = 0;
    for(int i = 0; i < n; i++){
        ans += pow(2, i) * arr[n-i -1];
    }
    
    cout << ans;
    return 0;
    
}