#include <bits/stdc++.h>
using namespace std;
int main() {
  long long n, a, b, c, d = 0, e, f, g = 0, h;
  cin >> n >> a >> b;
  long long s[n];
  for (int i = 0; i < n; i++) {
    cin >> s[i];
    d = d + s[i];
  }
  f = (s[0] * a) / b;
  sort(s + 1, s + n);
  for (int i = n - 1; i >= 1; i--) {
    if (f >= d) {
      break;
    } else {
      d = d - s[i];
      g++;
    }
  }
  cout << g << endl;
}
