#include <bits/stdc++.h>
using namespace std;
bool cmp(int n1, int n2) { return n1 > n2; }
int main(int argc, char const *argv[]) {
  int n;
  cin >> n;
  double a, b;
  cin >> a >> b;
  double num[100001];
  double sum = 0.0;
  for (int i = 0; i < n; ++i) {
    cin >> num[i];
    sum += num[i];
  }
  sort(num + 1, num + n, cmp);
  double s = num[0] * a / b;
  int result = 0;
  if (s >= sum) {
    cout << result << endl;
    return 0;
  }
  for (int i = 1; i < n; ++i) {
    if (s < sum) {
      sum -= num[i];
      result++;
    }
    if (s >= sum) {
      cout << result << endl;
      break;
    }
  }
  return 0;
}
