#include <bits/stdc++.h>

using namespace std;

int main()
{
  int n;
  cin >> n;
  vector<int> a(n);
  for (auto&& i : a) {
    cin >> i;
  }
  sort(a.rbegin(), a.rend());
  for (int i = 1; i < a.size(); i++) {
    a[0] += a[i] / 2;
  }
  cout << a[0] << "\n";
  return 0;
}