#include <bits/stdc++.h>
 
using namespace std;

typedef long long ll;
typedef pair<int,int> pii;

ll sum = 0;
int n;
ll c[100];

int main(){
	//freopen("input.txt","r",stdin);
	scanf("%d",&n);
	for (int i = 0; i < n; ++i){
		scanf("%lld",&c[i]);
	}
	sort(c,c+n);
	int cnt = 0;
	for (int i = n - 1; i>= 0 ; i--){
		sum += c[i] * (1ll << cnt);
		cnt++;
	}
	printf("%lld\n",sum );
	return 0;
}