#include <bits/stdc++.h>
using namespace std;
int main() {
  int n, a, b, x, c = 0, sum = 0, i;
  cin >> n >> a >> b;
  int s[n];
  for (i = 0; i < n; i++) {
    cin >> s[i];
    sum += s[i];
  }
  sort(s + 1, s + n, greater<int>());
  x = (s[0] * a) / b;
  i = 1;
  while (sum > x) {
    sum = sum - s[i];
    i++;
    c++;
  }
  cout << c;
}
