#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;
  long long int c[n], ans = 0;
  for (int i = 0; i < n; i++) cin >> c[i];
  sort(c, c + n);
  for (int i = 0, j = n - 1; i < n; i++, j--) {
    ans += c[j] * (1ll << i);
  }
  cout << ans;
    return 0;
}