#include <bits/stdc++.h>
using namespace std;
const int N = 1e6 + 10;
int s[N + 10];
int main() {
  ios_base::sync_with_stdio(false);
  int n, a, b;
  cin >> n >> a >> b;
  int fi, sum = 0, ans = 0;
  cin >> fi, sum = fi;
  for (int i = 0; i < n - 1; i++) cin >> s[i], sum += s[i];
  sort(s, s + n - 1);
  if ((long double)a * fi / sum >= b) return cout << ans, 0;
  for (int i = n - 2; i >= 0; i--) {
    sum -= s[i], ans++;
    if ((long double)a * fi / sum >= b) return cout << ans, 0;
  }
  return 0;
}
