/*
 ____    _____      _      _               _____ 
/ ___|  | ____|    / \    | |             |___  |
\___ \  |  _|     / _ \   | |      _____     / / 
 ___) | | |___   / ___ \  | |___  |_____|   / /  
|____/  |_____| /_/   \_\ |_____|          /_/   
*/

#include <bits/stdc++.h>
using namespace std;

typedef long long ll;
typedef vector<int> vi; 
typedef pair<int,int> ii; 
#define sz(a) int((a).size()) 
#define pb push_back 
#define all(c) (c).begin(),(c).end() 
#define tr(c,i) for(typeof((c).begin() i = (c).begin(); i != (c).end(); i++) 
#define present(c,x) ((c).find(x) != (c).end()) 
#define cpresent(c,x) (find(all(c),x) != (c).end()) 
#define modulo(a, b) (a%b<0 ? a%b+b : a%b)
bool myfunction (int i,int j) { return (i>j); }
ll power(ll x, ll y)
{
    ll temp;
    if( y == 0)
       return 1;
    temp = power(x, y/2);       
    if (y%2 == 0)
        return temp*temp;
    else
    {
        if(y > 0)
            return x*temp*temp;
        else
            return (temp*temp)/x;
    }
}
int main(){
	ll n,val;
	cin>>n;
	vector<int> vec;
	for(int i=0; i< n; i++){
		cin>>val;
		vec.push_back(val);
	}
	sort(vec.begin(),vec.end(),myfunction);
	ll cal=0;
	for(int i=0; i< n; i++){
		cal+=(vec[i]*power(2.0,i));
	}
	cout<<cal;
	return 0;
}