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#include <iostream>

using namespace std;

int n;
int calc[1000007];
int pre[1000007];
int res[1000007];
int resSize = 0;

int main() {
  ios_base::sync_with_stdio(false);
  cin.tie(NULL);

  cin >> n;

  for (int i = 1; i < 1000007; i++) {
    int num = i;
    while (num > 0) {
      calc[i] += num % 2;
      num >>= 1;
    }

    pre[i] = calc[i] + pre[i - 1];
  }

  for (int i = n; i >= 1 && n > 0; i--) {
    if (pre[i - 1] < n) {
      n -= calc[i];
      res[resSize++] = i;
    }
  }

  cout << resSize << "\n";
  for (int i = 0; i < resSize; i++) {
    cout << res[i] << " ";
  }
  cout << "\n";
}