#include <bits/stdc++.h>
using namespace std;
const int max_power = 50;
int two_powers[max_power];
int between[max_power];
int extra[max_power];
int ende[max_power];
int main() {
  int N;
  cin >> N;
  bool okay;
  int two_pow;
  long long tmp;
  for (int i = 0; i < N; i++) {
    cin >> tmp;
    two_pow = 0;
    okay = true;
    while (tmp > 1) {
      if (tmp & 1) okay = false;
      two_pow++;
      tmp /= 2;
    }
    if (okay)
      two_powers[two_pow]++;
    else
      between[two_pow]++;
  }
  int low = 1, high = two_powers[0] + 1, mid, cur;
  while (low < high) {
    mid = (low + high) / 2;
    cur = mid;
    for (int i = 0; i < max_power; i++) {
      extra[i] = two_powers[i] - cur;
      int nxt_cur = min(cur, two_powers[i + 1]);
      ende[i] = cur - nxt_cur;
      cur = nxt_cur;
    }
    bool fail = false;
    int open = 0;
    for (int i = max_power - 1; i >= 0; i--) {
      open += ende[i];
      open -= between[i];
      open -= extra[i + 1];
      if (open < 0) {
        fail = true;
        break;
      }
    }
    open -= extra[0];
    if (open < 0) fail = true;
    if (fail)
      low = mid + 1;
    else
      high = mid;
  }
  if (low > two_powers[0])
    cout << "-1";
  else
    for (int i = low; i <= two_powers[0]; i++) cout << i << " ";
  return 0;
}
