#include <bits/stdc++.h>
using namespace std;
vector<double> sizes;
bool cmp(double &a, double &b) { return a > b; }
int main() {
  int n;
  double a, b;
  cin >> n >> a >> b;
  double in, sum = 0, target, first;
  for (int i = 0; i < n; ++i) {
    cin >> in;
    sum += in;
    if (i == 0) {
      first = in;
      continue;
    }
    sizes.push_back(in);
  }
  target = first * a / b;
  sort(sizes.begin(), sizes.end(), cmp);
  int cnt = 0;
  for (vector<double>::iterator ite = sizes.begin(); ite != sizes.end();
       ++ite) {
    if (target >= sum) {
      break;
    }
    sum -= *ite;
    ++cnt;
  }
  cout << cnt << endl;
  return 0;
}
