#include <bits/stdc++.h>
using namespace std;
int main() {
  long long n, curr_sum = 0;
  int a, b;
  cin >> n >> a >> b;
  int s[n];
  for (long long i = 0; i < n; i++) {
    cin >> s[i];
    curr_sum += s[i];
  }
  sort(s + 1, s + n, greater<int>());
  long long n_h = 0, flow = (a * s[0]) / curr_sum;
  while (flow < b) {
    n_h++;
    curr_sum -= s[n_h];
    flow = (a * s[0]) / (curr_sum);
  }
  cout << n_h;
  return 0;
}
