#include <bits/stdc++.h>
using namespace std;
int main() {
  long long n, a, b;
  long long sum = 0;
  cin >> n >> a >> b;
  long long arr[n];
  for (long long i = 0; i < n; i++) {
    long long sx;
    cin >> sx;
    arr[i] = sx;
    sum += sx;
  }
  long long sp = sum;
  sort(arr + 1, arr + n);
  long long idx = n - 1;
  long long ans = 0;
  while (b * sp > arr[0] * a) {
    sp -= arr[idx];
    ans++;
    idx--;
  }
  cout << ans << endl;
  return 0;
}
