#include <bits/stdc++.h>
const long double PI = 3.1415926535897932384626433832795;
const long double EPS = 0.00000000000000000000001;
using namespace std;
long long n, i, j, a, b;
pair<long long, long long> s[100010];
int main() {
  ios_base::sync_with_stdio(0);
  cin.tie(NULL);
  cout.tie(NULL);
  cin >> n >> a >> b;
  long long sum = 0;
  for (i = 1; i <= n; i++) {
    cin >> s[i].first;
    s[i].second = i;
    sum += s[i].first;
  }
  long long ans = s[1].first, answer = 0;
  sort(s + 1, s + 1 + n);
  for (i = n; i >= 1; i--) {
    if (s[i].second != 1) {
      if ((ans * a) / sum < b) sum -= s[i].first, answer++;
    }
  }
  cout << answer;
  return 0;
}
