#include <iostream>

using namespace std;

int main() {
  int n, x, d;
  cin >> n >> d >> x;
  d--;
  int a = 0;
  for (int i=0; i<n; i++) {
    cin >> a;
    x += d/a + 1;
  }
  cout << x << endl;
  return 0;
}
