#include <bits/stdc++.h>
using namespace std;
int main() {
  int n;
  while (cin >> n) {
    int a, b, k_a;
    vector<int> v(n);
    cin >> a >> b;
    cin >> k_a;
    for (int i = 0; i < n; i++) cin >> v[i];
    sort(v.begin(), v.end());
    int ans = k_a / a, sum = 0;
    for (int i = 1; i <= n; i++) {
      sum += v[n - i];
      ans = max(ans, (k_a + sum) / (a + i * b));
    }
    cout << ans << endl;
  }
  return 0;
}
