#include<algorithm>
#include<bitset>
#include<complex>
#include<ctype.h>
#include<iomanip>
#include<iostream>
#include<fstream>
#include<map>
#include<math.h>
#include<numeric>
#include<queue>
#include<set>
#include<stack>
#include<stdio.h>
#include<string>
#include<string>
#include<vector>

using namespace std;
typedef long long ll;

#define FOR(i,a,b) for(ll i=(a);i<(b);++i)
#define ALL(v) (v).begin(), (v).end()
#define p(s) cout<<(s)<<endl
#define p2(s, t) cout << (s) << " " << (t) << endl
#define br() p("")
#define pn(s) cout << (#s) << " " << (s) << endl
#define p_yes() p("Yes")
#define p_no() p("No")

int main(){
    cin.tie(0);
    ios::sync_with_stdio(false);

    // input
    ll N;
    cin >> N;

    vector<bool> visited(N+1, false);
    vector<ll> dist(N+1, -1);
    queue<ll> que;

    que.push(1);
    visited[1] = true;
    dist[1] = 1;

    while(!que.empty()){
        ll index = que.front();
        que.pop();

        // ビットの数
        bitset<20> bs(index);
        ll bit_count = bs.count();

        // 行き先２箇所
        ll next = index + bit_count;
        if(1<=next && next<=N && !visited[next]){
            que.push(next);
            visited[next] = true;
            dist[next] = dist[index] + 1;
        }
        
        next = index - bit_count;
        if(1<=next && next<=N && !visited[next]){
            que.push(next);
            visited[next] = true;
            dist[next] = dist[index] + 1;
        }
    }

    p(dist[N]);
    
    return 0;
}