#include <bits/stdc++.h>
using namespace std;
double s[100008], sum;
long long ans;
int main() {
  double A, B;
  long long n;
  cin >> n >> A >> B;
  for (int i = 1; i <= n; i++) {
    cin >> s[i];
    sum += s[i];
  }
  double to = (s[1] * A) / B;
  sort(s + 2, s + n + 1);
  for (int i = n; i >= 2; i--) {
    if (sum > to)
      sum -= s[i], ans++;
    else
      break;
  }
  cout << ans << endl;
  return 0;
}
