#include <cmath>
#include <cstdio>
#include <vector>
#include <iostream>
#include <algorithm>
#include<bits/stdc++.h>
using namespace std;
#define ll long long int

int main() {
    /* Enter your code here. Read input from STDIN. Print output to STDOUT */   
    ll n;
    cin>>n;
    ll a[n+5];
    for(ll i=0;i<n;++i){
        scanf("%lld",&a[i]);
    }
    sort(a,a+n);
    ll ans=0;
    ll k=1;
    for(ll i=n-1;i>=0;i--){
        ans= ans+ a[i]*k;
        k=k*2;
    }
    cout<<ans;
    return 0;
}