#include <bits/stdc++.h>
using namespace std;
const int N = 100000;
int ss[N];
int main() {
  int n, a, b;
  cin >> n >> a >> b;
  int s = 0;
  for (int i = 0; i < n; i++) {
    int a;
    cin >> a;
    ss[i] = a;
    s += ss[i];
  }
  sort(ss + 1, ss + n);
  for (int i = n - 1; i >= 0; i--) {
    if (ss[0] * a / s >= b) {
      cout << n - 1 - i << '\n';
      return 0;
    }
    s -= ss[i];
  }
  return 0;
}
