#include <bits/stdc++.h>
#include<string.h>
#define MOD 1000000007
#define MAXA 10000000000000ll
#define PI 3.14159265358979323846264338327950
#define INF 0x3f3f3f3f
typedef long long int ll;
using namespace std;
const ll maxa= 10000000000000ll;
const  int maxn=2e5+5;
const int N=1e6;
ll a[maxn],po[maxn];
int main()
{
    //freopen("input.txt","r+",stdin);
    //freopen("output.txt","w+",stdout);
    ll n,i;
    cin>>n;
    po[0]=1;
    for(i=1;i<=40;i++)
        po[i]=po[i-1]*2LL;
    for(i=0;i<n;i++)
        cin>>a[i];
    sort(a,a+n);
    ll j=0;
    ll ans=0;
    for(i=n-1;i>=0;i--)
    {
        ans+=a[i]*1LL*po[j];
        j++;
    }
    cout<<ans;
    return 0;
}