#include <bits/stdc++.h>
using namespace std;
int main() {
  ios_base::sync_with_stdio(false);
  cin.tie(NULL);
  cout.tie(NULL);
  long long int n, a, b;
  cin >> n >> a >> b;
  vector<long long int> v(n - 1);
  long long int first, sum = 0;
  cin >> first;
  sum += first;
  for (long long int i = 0; i < n - 1; i++) {
    cin >> v[i];
    sum += v[i];
  }
  sort(v.begin(), v.end(), greater<int>());
  if (first * a / sum >= b)
    cout << "0" << endl;
  else {
    for (long long int i = 0; i < n - 1; i++) {
      sum -= v[i];
      if (first * a / sum >= b) {
        cout << i + 1 << endl;
        return 0;
      }
    }
  }
  return 0;
}
