#include<bits/stdc++.h>
using namespace std;
#define int long long
#define INF 101010101


int N, temp2[11000];

int huga(int a){//cout<<a<<endl;
  int ans=0;
  while(a){//cout<<a%2;
    if(a%2)ans++;
    a/=2;
  }//cout<<endl;
  //cout<<ans<<endl;
  return ans;
}


int foo(int a, int k){//cout<<a<<endl;
  if(a==N)return k;
  temp2[a]=1;
  int temp = huga(a), ans=INF;
  if(a-temp >= 1){
    if(temp2[a-temp]==0){
      ans = min(foo(a-temp,k+1), ans);
    }
  }
  if(a+temp <= N){
    if(temp2[a+temp]==0){
      ans = min(foo(a+temp,k+1), ans);
    }
  }
  return ans;
}


signed main(){
  cin>>N;
  int ans = foo(1,1);
  if(ans==INF)cout<<-1<<endl;
  else cout<<ans<<endl;
  return 0;
}