#include<bits/stdc++.h>
using namespace std;
#define INF 1000000001
typedef long long int ll;
int main(){
    int n;
    scanf("%d",&n);
    int arr[n];
    for(int i=0;i<n;i++){
	scanf("%d",&arr[i]);
    }
    sort(arr,arr+n);
    ll m=1;
    ll ans=0;
    for(int i=n-1;i>=0;i--){
	ans+=arr[i]*m;
	m=m*2;
    }
    printf("%lld\n",ans);
}