#include <bits/stdc++.h>
#define ll  long long
using namespace std;
int main (){
   ll n,m,l,k=1,t;
cin>>n;
ll a[n];
for (ll i=0;i<n;i++){
	cin>>a[i];
}
ll ans=0;
sort(a,a+n);
for (ll i=n-1;i>=0;i--){
	ll t=n-i-1;
	ans+=a[i]*pow(2,t);
	
}

cout<<ans;
	
return 0;}