#include<bits/stdc++.h>
using namespace std;
#define M 1000000007
#define f first
#define s second
#define pb push_back
#define ll long long
#define mp make_pair
#define r0 return 0
int mini(int a,int b){return a<b?a:b;}
ll lmini(ll a,ll b){return a<b?a:b;}
int maxi(int a,int b){return a>b?a:b;}
ll lmaxi(ll a,ll b){return a>b?a:b;}
int gcd(int a, int b){ if(b==0) return a; return gcd(b,a%b); }
ll lgcd(ll a, ll b){ if(b==0) return a; return gcd(b,a%b); }
int lcm(int a, int b) {return a*(b/gcd(a,b));}
ll llcm(ll a, ll b) {return a*(b/gcd(a,b));}
int main(){
    ll n,i,c=0;
    cin>>n;
    ll a[n+1];
    for(i=1;i<=n;i++){
        cin>>a[i];
    }
    sort(a+1,a+n+1);
    for(i=n;i>=1;i--){
        c+=pow(2,n-i)*a[i];
    }
    cout<<c<<endl;
    r0;
}