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

#define In freopen("F:/input.txt","r",stdin)
#define Out freopen("F:/output.txt","w",stdout)
#define fast ios_base::sync_with_stdio(false);cin.tie(0);cout.tie(0)
#define ll long long
#define int long long
#define mod 1000000007
#define rep(i,x,y) for (__typeof(y) i=x;i<=y;i++)
#define all(c) (c).begin(),(c).end()
#define ff first
#define ss second
#define pb push_back
#define mp make_pair
#define pii pair<int,int>
#define vi vector<int>


int power(int a , int b)
{
    int res = 1 ;
    while(b)
    {
        if(b%2) {
            res = (res * a) % mod ;
        }
        b/=2 ;
        a = (a*a) % mod ;
    }
    return res ;
}

int32_t main()
{
    fast;
    int n,ans=0;
    cin>>n;
    int a[45];
    rep(i,1,n) {
        cin>>a[i];
    }
    sort(a+1,a+n+1);
    for(int i=n;i>=1;i--) {
        ans=ans+(1ll<<(n-i))*a[i];
    }
    cout<<ans<<endl;
    return 0;
}