#include <cmath>
#include <cstdio>
#include <vector>
#include <iostream>
#include <algorithm>
using namespace std;


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