#include <iostream>
#include <algorithm>
using namespace std;
int N, A[100];
int main(){
	cin >> N;
	for(int i=1; i<=N; ++i) cin >> A[i];
	sort(A+1, A+1+N);	
	reverse(A+1, A+1+N);
	long long ans = 0;
	for(int i=1; i<=N; ++i){
		ans = ans + A[i] * (1LL << (i-1));
	}
	cout << ans << endl;
}