#include <bits/stdc++.h>
using namespace std;
int main() {
  int n, A, B;
  scanf("%d %d %d", &n, &A, &B);
  long long *s = new long long[n];
  for (int i = 0; i < n; i++) {
    int x;
    scanf("%d", &x);
    s[i] = x;
  }
  sort(s + 1, s + n, greater<long long>());
  long long sum = 0;
  for (int i = 0; i < n; i++) {
    sum += s[i];
  }
  int i = 0;
  while (s[0] * A < sum * B) {
    sum -= s[i + 1];
    i++;
  }
  printf("%d\n", i);
  delete[] s;
}
