//I_F_A
#include "bits/stdc++.h"
using namespace std;

int main(){

	ios_base::sync_with_stdio(false);
	cin.tie(NULL);

	long long n;
	cin >> n;

	long long ans = 0 ,arr[n+1];
	for(long long i=1;i<=n;i++){

		cin >> arr[i];
	}

	long long c  =  1;

	sort(arr+1,arr+n+1);

	for(long long i=n;i>=1;i--){

		ans = ans + c*arr[i];
		c = c << 1;
	}
	cout << ans << endl;
}