#include <cmath>
#include <cstdio>
#include <stdio.h>
#include <malloc.h>
#include <vector>
#include <iostream>
#include <algorithm>
using namespace std;


int main() {
    int n; 
    scanf("%d",&n);
    int calories[n];
    for(int calories_i = 0; calories_i < n; calories_i++){
       scanf("%d",&calories[calories_i]);
    }  
    sort(calories,calories+n);
    long long int sum=0,mult=1;
    for(int i=n-1;i>=0;i--){
        sum = sum + mult*calories[i];
        mult = mult*2;
        //cout<<sum<<endl;
    }
    cout<<sum;
    return 0;
}