#include <iostream>
#include <cstdio>
#include <string>
#include <sstream>
#include <vector>
#include <set>
#include <map>
#include <queue>
#include <stack>
#include <cmath>
#include <algorithm>
#include <cstring>
#include <ctime>
#include <cctype>

using namespace std;

int main()
{
    unsigned long long ans;
    int n;
    cin>>n;
    int c[n];
    for(int i = 0; i < n; i++)
    {
        cin>>c[i];
    }
    sort(c, c + n, greater<int>());
    for(int i = 0; i < n; i++)
    {
        ans += pow(2,i) * c[i];
    }
    cout<<ans<<endl;
}