#include <bits/stdc++.h>
using namespace std;
int main() {
  int n;
  cin >> n;
  vector<int> a(n);
  for (int i = 0; i < n; ++i) {
    cin >> a[i];
  }
  sort(a.begin(), a.end());
  bool res = true;
  for (int i = 0; i < n - 1; ++i) {
    if (a[i] != a[i + 1] && 2 * a[i] > a[i + 1]) {
      res = false;
      break;
    }
  }
  if (res) {
    cout << "NO" << endl;
  } else {
    cout << "YES" << endl;
  }
  return 0;
}
