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

typedef long long ll;
ll v[100];
int main() {
    int n;
    cin >> n;
    for(int i = 0; i < n; i++)
        cin >> v[i];
    sort(v, v + n, greater<int>());
    
    ll ans = 0;
    for(int i = 0; i < n; i++
      )
        ans += (1ll << i) * v[i];
    cout << ans << '\n';
    
    /* Enter your code here. Read input from STDIN. Print output to STDOUT */   
    return 0;
}