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

ll m, n, x, y, z;
ll ara[3000];

int main()
{
    cin >> n;
    
    for(ll i = 1; i <= n; i++) cin >> ara[i];
    sort(ara + 1, ara + n + 1);
    ll tmp = 1, ans = 0;
    
    for(ll i = n; i >= 1; i--){
        ans += tmp * ara[i];
        tmp = tmp * 2;
    }
    
    cout << ans << endl;
    
    return 0;
}