#include <bits/stdc++.h>

typedef long long int ll;
typedef unsigned long long int ull;
typedef long double ld;

#define mp make_pair
#define pb push_back
#define bp __builtin_popcount

#define mt(a,b,c) mp(a,mp(b,c))

const ll mo=1e9+7;
const ll INF=1e9;
const ld pi=acos(-1);
const int mxn=1e4+5;
const int cons=1;

using namespace std;

int arr[45];

int main()
{
    //freopen("input.txt","r",stdin);
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    int n,i;
    ll ans,p;
    cin>>n;
    for(i=0;i<n;i++)
    {
        cin>>arr[i];
    }
    sort(arr,arr+n);
    ans=0;
    p=1;
    for(i=n-1;i>=0;i--)
    {
        ans+=p*arr[i];
        p*=2;
    }
    cout<<ans;
    return 0;
}