#include <bits/stdc++.h>
using namespace std;
long long n, arr[500010], temp, j, i, ans;
int main() {
  ios::sync_with_stdio(false);
  cin.tie(0);
  cout.tie(0);
  cin >> n;
  for (long long i = 0; i < n; i++) {
    cin >> arr[i];
  };
  sort(arr, arr + n);
  i = 0, j = n / 2;
  ans = n;
  while (i < n / 2) {
    while (j < n) {
      if (arr[i] * 2 <= arr[j]) {
        ans--;
        j++;
        break;
      } else
        j++;
    }
    i++;
  }
  cout << ans << "\n";
}
