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


int main() {
    /* Enter your code here. Read input from STDIN. Print output to STDOUT */  
    int n;
    cin>>n;
    long long arr[n];
    for(int i=0;i<n;i++){
        cin>>arr[i];
    }
    sort(arr,arr+n);
    long long int total=0;
    int count=0;
    for(int i=n-1;i>=0;i--){
        total+=pow(2,count)*arr[i];
        count++;
    }
    cout<<total<<endl;
    return 0;
}