#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 */   
    
    vector<long long>v;
    int n;
    cin>>n;
    
    for(int i=0;i<n;++i){
        long long x;
        cin>>x;
        v.push_back(x);
        
    }
    sort(v.begin(),v.end());
    int nw=0;
    long long ans=0;
    for(int i=n-1;i>=0;--i){
        long long cur=(1LL<<nw)*v[i];
        ans+=cur;
        ++nw;
    }
    cout<<ans<<endl;
    
    return 0;
}