#include<bits/stdc++.h>
using namespace std;
#define rep(i,a,b) for(int (i)=(a);(i)<=(b);++i)
#define repd(i,a,b) for(int (i)=(a); (i)>=(b);--i)
#define pb push_back
#define mp make_pair
#define fi first
#define se second
#define ll long long int
#define mod 1000000007


int main()
{
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    ll i,n,a[1010];
    cin>>n;
    rep(i,0,n-1)
    {
        cin>>a[i];
    }
    sort(a,a+n);
    ll ans=0, po=1;
    repd(i,n-1,0)
    {
        ans+=po*a[i];
        po*=2;
    }
    cout<<ans;
    return 0;
}