#include <bits/stdc++.h>
using namespace std;
int sum = 0, ans = 0, n, a, b, i, x[100005];
double p;
int main() {
  scanf("%d%d%d", &n, &a, &b);
  for (i = 1; i <= n; i++) {
    scanf("%d", &x[i]);
  }
  sum += x[1];
  sort(x + 2, x + n + 1);
  p = x[1] * a / (double)b;
  for (i = 2; sum <= p && i <= n; i++) sum += x[i];
  if (i <= n)
    printf("%d\n", n - i + 2);
  else {
    if (sum <= p)
      printf("0");
    else
      printf("1");
  }
  return 0;
}
