#include <bits/stdc++.h>
#define fi(a,b,c) for(int a=b; a<=c; a++)
#define fd(a,b,c) for(int a=b; a>=c; a--)
#define fii(a,b,c) for(int a=b; a<c; a++)
#define pb push_back
#define mp make_pair
#define ft first
#define sc second
#define reset(a,b) memset(a,b, sizeof a)
#define sz(a) (int)a.size()

using namespace std;

typedef long long ll;
typedef unsigned long long ull;
typedef long double ld;
typedef pair<int, int> pi;
typedef vector<int> vi;
typedef vector<pi> vii;
const int MOD = (int) 1e9 + 7;
const int oo = (int) 1e9;
const ll ooll = (ll)(1e18);
const ld EPS = 1e-9;
const int N = 100;

int n;
int a[100] ;

int main() {
    scanf("%d", &n);
    fi(i, 1, n) scanf("%d", &a[i]);
    sort (a + 1, a + n + 1);
    ll ans = 0;
    ll Pow = 1;
    fd(i, n, 1) {
        ans = ans + a[i] * Pow;
        Pow = Pow * 2;
    }
    printf("%lld", ans);
}