#include <bits/stdc++.h>
using namespace std;
int main() {
  ios::sync_with_stdio(0);
  int n, A, B;
  cin >> n >> A >> B;
  long long sum = 0;
  int x, s[101010];
  cin >> x;
  sum = x;
  for (int i = 0; i < n - 1; i++) cin >> s[i], sum += s[i];
  sort(s, s + n - 1, greater<int>());
  int ret = 0;
  for (int i = 0; i < n - 1; i++) {
    if (x * A >= (long long)sum * B) break;
    sum -= s[i];
    ret++;
  }
  cout << ret;
}
