#include <iostream>
#include <string>
#include <cstring>
#include <cstdio>
#include <algorithm>
#include <vector>

using namespace std;
int n;

int cnt1(int n){
  int result = 0;
  while(n){
    if(n & 1) result += 1;
    n >>= 1;
  }
  return result;
}

bool solve(bool field[], int now, int depth){
  if(now < 1 || now > n) return false;
  if(now == n){
    cout << depth << endl;
    return true;
  }if(field[now]){
    field[now] = false;
    return solve(field, now + cnt1(now), depth + 1) || solve(field, now - cnt1(now), depth + 1);
  }
  return false;
}

int main(){
  cin >> n;
  bool field[n];
  for(int i = 0; i < n; i++){
    field[i] = true;
  }
  if(!solve(field, 1, 1)) cout << -1 << endl;
}