#include <bits/stdc++.h>
using namespace std;
int a[100005];
int main() {
  ios_base::sync_with_stdio(0);
  cin.tie(0);
  int n, A, B, x, sum = 0;
  cin >> n >> A >> B;
  for (int i = 0; i < n; i++) {
    if (!i)
      cin >> x;
    else {
      cin >> a[i - 1];
      sum += a[i - 1];
    }
  }
  sum += x;
  sort(a, a + n - 1, greater<int>());
  int c = 0;
  for (int i = 0; i < n - 1; i++) {
    if (x * A / sum >= B) {
      cout << c << endl;
      return 0;
    }
    sum -= a[i];
    c++;
  }
  if (x * A / sum >= B)
    cout << c << endl;
  else
    cout << 0 << endl;
  return 0;
}
