#include <bits/stdc++.h>
using namespace std;
int main() {
  vector<int> v;
  int n, A, B;
  cin >> n >> A >> B;
  int msum = 0;
  for (int i = 0; i < n; i++) {
    int x;
    cin >> x;
    v.push_back(x);
    msum += x;
  }
  int one = v[0];
  v[0] = INT_MAX;
  sort(v.begin(), v.end());
  int x = n;
  int sum = msum;
  int res = 0;
  for (int i = n - 2; i >= 0; i--) {
    if (((one * A) / sum) >= B) {
      cout << res << endl;
      return 0;
    }
    sum -= v[i];
    res++;
  }
  cout << n - 1 << endl;
}
