#include<bits/stdc++.h>
using namespace std;
# define ll long long int 
ll arr[1000001];
string str;
int main(){
	ios::sync_with_stdio(false);cin.clear();
	ll t,n,i,j,ans=0,count=0,sum=0,k,m;
		cin>>n;
		for(i=0;i<n;i++){
			cin>>arr[i];
		}
		sort(arr,arr+n);
		for(i=n-1;i>=0;i--){
			ans+=pow(2,count)*arr[i];
			count++;
		}
		cout<<ans;
}