#include <bits/stdc++.h>
#define ll long long
#define pi acos(-1.0)
#define rf freopen("in.txt", "r", stdin);
#define ld long double
#define all(v) v.begin(),v.end()
#define pb push_back
#define ff first
#define ss second
#define sz size()
#define ln length()
#define REP(i,a) for(int i=0;i<a;++i)
#define REPP(i,a,b) for(int i=a;i<b;++i)
#define s(n) scanf("%d",&n);
#define sl(n) scanf("%lld",&n);
#define sld(n) scanf("%lf", &n);

using namespace std;

vector <int> a;

int main() {
    ll n;
    sl(n);
    for (int i = 0; i < n; i++) {
        int x;
        s(x);
        a.push_back(x);
    }
    sort(all(a));
    reverse(all(a));
    ll x = (a[0] * pow(2, 0));
    for (int i = 1; i < n; i++) {
        x = x + (a[i] * pow(2, i));
    }
    cout << x << endl;
    return 0;
}