#include <bits/stdc++.h>
using namespace std;
 
#define ll long long
#define rep(i,a,b) for(ll i=a;i<b;i++)
#define brep(i,a,b) for(ll i=a;i>=b;i--)
#define reph(i,vec) for(auto &i:vec)
#define FI first
#define SE second
#define P pair
#define PB(a) push_back(a)
#define all(vec) vec.begin(),vec.end()
 
#define INF 1000000000000000000
#define MOD 1000000007
 
//GLOBAL変数のコーナー
ll N;
vector<ll> saitan(10100,-1);
vector<bool> visited(10100,false);
//
 
//関数のコーナー
 
//

int main(){
    cin >> N;
    queue<ll> sirabe;
    sirabe.push(N);
    saitan[N]=1;
    while(!sirabe.empty()){
        ll s=sirabe.front();
        sirabe.pop();
        visited[s]=true;
        rep(i,(ll)max(1LL,s-20LL),(ll)min(N,s+20LL)){
            if(i==s)continue;
            if(__builtin_popcount(i)==abs(s-i)&&!visited[i]){
                saitan[i]=saitan[s]+1;
                sirabe.push(i);
                visited[i]=true;
            }
        }
    }
    cout << saitan[1] << endl;
}