#include <bits/stdc++.h>
using namespace std;
int main() {
  ios_base::sync_with_stdio(false);
  cin.tie(NULL);
  cout.tie(NULL);
  long long n, all, req;
  cin >> n >> all >> req;
  long long arr[n - 1];
  long long fir;
  long long sum;
  cin >> fir;
  sum = fir;
  for (int i = 0; i < n - 1; i++) {
    cin >> arr[i];
    sum += arr[i];
  }
  sort(arr, arr + n - 1, greater<long long>());
  int res = 0;
  while (fir * all < req * sum) {
    sum -= arr[res];
    res++;
  }
  cout << res << endl;
  return 0;
}
