#include<bits/stdc++.h>
#define MAX 100005
#define ll long long
#define gc getchar_unlocked
#define pc putchar_unlocked
#define SRT int t;cin>>t;while(t--)
#define FAST ios_base::sync_with_stdio(false)
#define mp make_pair
using namespace std;

ll power(ll x, ll n){
	if(n==0) return 1;
	if(n%2==0) return power((x*x),n/2);
	else return (x*(power((x*x),(n-1)/2)));
}
int main(){
	FAST;
	int n;
	cin>>n;
	int a[n];
	for(int i=0;i<n;++i) cin>>a[i];
	ll sum=0,j=0;
	sort(a,a+n);
	for(int i=n-1;i>=0;--i){
		sum+=a[i]*power(2,j);
		++j;
	}
	cout<<sum<<endl;
}