#include <bits/stdc++.h>
using namespace std;
int s[100010];
int main() {
  int n, a, b, m = 0;
  long long sum = 0;
  scanf("%d%d%d", &n, &a, &b);
  for (int i = 1; i <= n; i++) {
    scanf("%d", &s[i]);
    sum += s[i];
  }
  if (n < 2 || a * s[1] / sum >= b) {
    printf("0\n");
    return 0;
  }
  sort(s + 2, s + n + 1);
  while (a * s[1] / sum < b) {
    sum -= s[n];
    n--;
    m++;
  }
  printf("%d\n", m);
  return 0;
}
