#include <bits/stdc++.h>
#define ll long long
#define S second
#define F first
#define pb push_back
#define mp make_pair
#define fi "search.in"
#define fo "search.out"
#define ull unsigned ll
#define pii pair <int, int>
#define y1 shit

using namespace std;

const int MXN = 1e6 + 7;
const int INF = 1e9+7;
const int N = 1e3+7;

ll n, a[MXN], c;

int main () {
     //freopen("input.txt", "r", stdin);
    //freopen(fi, "r", stdin);
    //freopen(fo, "w", stdout);
   // ios_base::sync_with_stdio(0);
   // cin.tie(0);
    cin >> n;
    for(int i = 1; i <= n;i++) {
        cin >> a[i];
    }
    sort(a+1, a+n+1, greater <long long int>());
    for(int i = 1; i <= n; i++) {
        c += (a[i]*(1ll<<i-1));
    }
    cout << c;

    return 0;
}