#include<iostream>
#include<bitset>
#include<bits/stdc++.h>
using namespace std;
const int INTMAX = numeric_limits<int>::max();

unsigned long bitcount(int bits){
  bits = (bits & 0x55555555) + ((bits >> 1) & 0x55555555);
  //cout << "[bits]" << bits << endl;
  bits = (bits & 0x33333333) + ((bits >> 2) & 0x33333333);
  //cout << "[bits]" << bits << endl;
  bits = (bits & 0x0f0f0f0f) + ((bits >> 4) & 0x0f0f0f0f);
  //cout << "[bits]" << bits << endl;
  bits = (bits & 0x00ff00ff) + ((bits >> 4) & 0x00ff00ff);
  //cout << "[bits]" << bits << endl;
  bits = (bits & 0x0000ffff) + ((bits >> 4) & 0x0000ffff);
  //cout << "[bits]" << bits << endl;
  return bits;
}

int main() {

  int N;
  cin >> N;
  queue<int> q;
  q.push(1);
  vector<int> dist( N + 1, INTMAX );
  dist[1] = 1;
  //cout << "[1]" << dist[1] << endl;

  while(!q.empty()){
    int now = q.front();
    int bit = bitcount(now);
    q.pop();
    if(now - bit > 0 && dist[now - bit] == INTMAX){
      dist[now - bit] = dist[now] + 1;
      q.emplace(now - bit);
      //cout << "[" << dist[now] + 1 << "]" <<now - bit << endl;
    }
    if(now + bit <= N && dist[now + bit] == INTMAX){
      dist[now + bit] = dist[now] + 1;
      q.emplace(now + bit);
      //cout << "[" << dist[now] + 1 << "]" <<now + bit << endl;
    }
  }

  if(dist[N] != INTMAX){
    cout << dist[N] <<endl;
  }else{
    cout << -1 << endl;
  }
}