#include<bits/stdc++.h>
#define pi                  acos(-1)
#define READ                freopen("in.txt", "r", stdin)
#define WRITE               freopen("out.txt", "w", stdout)
#define INF                 1000000000
#define dist(ax,ay,bx,by)   sqrt((ax-bx)*(ax-bx)+(ay-by)*(ay-by))
#define M                   1000000
#define gcd(a,b)            __gcd(a,b)
#define lcm(a,b)            (a*b)/__gcd(a,b)
#define m_p(a,b)            make_pair(a,b)

using namespace std;
typedef unsigned long long llu;
typedef long long lli;


int main()
{
    lli n;
    cin>>n;
    lli sum=0;
    lli ara[100]={0};

    for(lli i=0; i<n; i++)
    {
        cin>>ara[i];


    }

    sort(ara, ara+n);
    reverse(ara, ara+n);

    for(lli i=0; i<n;i++) sum+=(ara[i]*powl(2,i));

    cout<<sum;


    return 0;
}