#include <iostream>
#include <queue>
#include <vector>
using namespace std;

int fnNumOneInBit(int n){
  int result=0;
  while(n>0){
    if(n%2==1) ++result;
    n/=2;
  }
  return result;
}

int main(){
  int tmp;
  int now, d;
  queue<int> Queue;
  cin >> tmp;  //入力
  const int n=tmp;
  vector<int> depth(n,0);
  bool bLoop=true;
  int depthMin;

  //幅優先探索
  Queue.push(1);
  depth[0]=1;

  while(!Queue.empty()){
    now=Queue.front();
    Queue.pop();

    if(now==n){
      bLoop=false;
      break;
    }else{
      d=fnNumOneInBit(now);
      for(int i=0; i<2; ++i){
	tmp = (i==0) ? (now-d) : (now+d);
	if(tmp>0 && tmp<=n && depth[tmp-1]==0){
	  Queue.push(tmp);
	  depth[tmp-1]=depth[now-1]+1;
	}
      }
    }
  }

  if(bLoop) depthMin=-1;
  else      depthMin=depth[n-1];
  cout << depthMin << endl; //出力

  return 0;
}