#include <bits/stdc++.h>
        #define s(a) cin >> a;
        #define s2(a,b) cin >> a>> b;
        #define s3(a,b,c) cin >> a>> b>> c;
        #define s4(a,b,c,d) cin >> a>> b >> c >> d;
        #define sp(b) cout << b << "\n";
        #define sp2(b,c) cout << b << " "<<c <<endl; 
        #define sp3(a,b,c) cout <<a <<" "<< b << " "<<c <<endl; 
        #define p(a) ////printf("%lld\n",a);
        #define p2(a,b) ////printf("%lld %lld",a,b);
        #define pm(a) ////printf("a\n");
        #define test(t) while(t>0)
        #define sl(a) a.length()
        #define f(a,b,c) for(a=b;a<c;a++)
        #define fr(a,b,c) for(a=c-1;a>=0;a--)
        #define v(a,b) vector<a> b;
        #define pb(a,b) a.push_back(b);
        #define ll long long
        #define mem(a,b) memset(a,b,sizeof(a));
        #define fillar(ar,n) f(i,0,n) s(ar[i]);
        #define diff(a,b) abs(a-b);
        using namespace std;
        #define MOD 1000000007
        #define flush fflush(stdout);
struct flist
{
    int val;
    int pos;
    
};

int main(){
        ios_base::sync_with_stdio(0), cin.tie(0), cout.tie(0);
        int i,j;
        ll n;
        s(n);
        ll ar[n];
        fillar(ar,n);
        sort(ar,ar+n);
        ll cur=0;
        ll ans=0;

        fr(i,0,n){
            ans +=pow(2,cur)*ar[i];
            cur ++;
        }
        printf("%lld\n",ans );

}