#include <bits/stdc++.h>
using namespace std;
std::vector<long double> v;
int main() {
  ios_base::sync_with_stdio(0);
  cin.tie(0);
  long double n, a, b, s1, tt;
  cin >> n >> a >> b;
  int ans = 0;
  cin >> s1;
  long double sumis = s1;
  for (int i = 1; i < n; ++i) {
    cin >> tt;
    v.push_back(tt);
    sumis += tt;
  }
  sort(v.rbegin(), v.rend());
  if ((s1 * a) / sumis >= b) {
    cout << "0";
    return 0;
  }
  for (int i = 0; i < n - 1; ++i) {
    sumis -= v[i];
    ans++;
    if ((s1 * a) / sumis >= b) {
      cout << ans;
      return 0;
    }
  }
  return 0;
}
