#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
#define fi first
#define se second
#define ii pair<int,int>
#define vii vector<pair<int,int> >
#define vi vector<int>

int n;
ll arr[50];

int main(){
//    freopen("in.txt","r",stdin);
//    freopen("out.txt","w",stdout);
	scanf("%d",&n);
	for(int i=1;i<=n;i++) scanf("%lld",arr+i);
	sort(arr+1,arr+1+n);
	ll bt = 1 ,ans = 0 ;
	for(int i=n;i>0;i--){
		ans = ans + bt*arr[i];
		bt*=2;
	}
	printf("%lld",ans);
	return 0;
}