#include<bits/stdc++.h>
using namespace std;
#define ALL(x) x.begin(),x.end()
#define rep(i,n) for(int i=0;i<(n);i++)
#define debug(v) cout<<#v<<":";for(auto x:v){cout<<x<<' ';}cout<<endl;
#define mod 1000000007
using ll=long long;
const int INF=1000000000;
const ll LINF=1001002003004005006ll;
int dx[]={1,0,-1,0};
int dy[]={0,1,0,-1};
// ll gcd(ll a,ll b){return b?gcd(b,a%b):a;}
template<class T>bool chmax(T &a,const T &b){if(a<b){a=b;return true;}return false;}
template<class T>bool chmin(T &a,const T &b){if(b<a){a=b;return true;}return false;}

struct IOSetup{
    IOSetup(){
        cin.tie(0);
        ios::sync_with_stdio(0);
        cout<<fixed<<setprecision(12);
    }
} iosetup;

template<typename T1,typename T2>
ostream &operator<<(ostream &os,const pair<T1,T2>&p){
    os<<p.first<<" "<<p.second;
    return os;
}

template<typename T>
ostream &operator<<(ostream &os,const vector<T>&v){
    for(int i=0;i<(int)v.size();i++) os<<v[i]<<(i+1==v.size()?"":" ");
    return os;
}

template<typename T>
vector<T> dijkstra(int s,vector<vector<pair<int,T>>> &G){
    const T TINF=numeric_limits<T>::max();
    using P=pair<T,int>;
    int n=G.size();
    vector<T> d(n,TINF);
    vector<int> b(n,-1);//previous point
    priority_queue<P,vector<P>,greater<P>> q;
    d[s]=0;
    q.emplace(d[s],s);
    while(!q.empty()){
        P p=q.top();q.pop();
        int v=p.second;
        if(d[v]<p.first) continue;
        for(auto& e:G[v]){
            int u=e.first;
            T c=e.second;
            if(d[u]>d[v]+c){
                d[u]=d[v]+c;
                b[u]=v;
                q.emplace(d[u],u);
            }
        }
    }
    return d;
}


signed main(){
    int n;cin>>n;

    vector<vector<pair<int,int>>> g(n+1);
    for(int i=1;i<=n;i++){
        int p=__builtin_popcount(i);
        if(i-p>0) g[i].push_back({i-p,1});
        if(i+p<=n)g[i].push_back({i+p,1});
    }
    auto d=dijkstra(1,g);
    if(d[n]<INF) cout<<d[n]+1<<endl;
    else cout<<-1<<endl;
    return 0;
}