#include "bits/stdc++.h"

using namespace std;
using ll = long long;
const double pi = acos(-1);
#define FOR(i,a,b) for (ll i=(a),__last_##i=(b);i<__last_##i;i++)
#define RFOR(i,a,b) for (ll i=(b)-1,__last_##i=(a);i>=__last_##i;i--)
#define REP(i,n) FOR(i,0,n)
#define RREP(i,n) RFOR(i,0,n)
#define __GET_MACRO3(_1, _2, _3, NAME, ...) NAME
#define rep(...) __GET_MACRO3(__VA_ARGS__, FOR, REP)(__VA_ARGS__)
#define rrep(...) __GET_MACRO3(__VA_ARGS__, RFOR, RREP)(__VA_ARGS__)
template<typename T> ostream& operator<<(ostream& os, const vector<T>& v) {
	REP(i, v.size()) { if (i)os << " "; os << v[i]; }return os;
}
template<typename T> ostream& operator<<(ostream& os, const vector<vector<T>>& v) {
	REP(i, v.size()) { if (i)os << endl; os << v[i]; }return os;
}

const ll INF = LLONG_MAX;
ll MOD = 1000000007;
ll _MOD = 1000000009;
double EPS = 1e-10;

#define int long long

inline void my_io() {

	std::ios::sync_with_stdio(false);

	std::cin.tie(0);

	cout << fixed << setprecision(16);

	//cout << setprecision(10) << scientific << ans << endl;
}

//ダイクストラ
const ll V = 100005;
using P = pair<ll, ll>;
vector<P> G[V];	//pair<辺の距離, 行き先の頂点>
vector<ll> dist(V); //dist[i]はsから頂点iへの最短距離が入る
vector<bool> used(V);
void dijkstra(ll s) {	//s : 始点
						//初期化
	fill(dist.begin(), dist.end(), INF);
	fill(used.begin(), used.end(), false);

	priority_queue<P, vector<P>, greater<P>> q;
	q.push(P(0, s));
	while (!q.empty()) {
		ll d;	//d : sからの距離
		ll t;	//t ; 行き先
		tie(d, t) = q.top();
		q.pop();
		if (used[t]) {	//もう探索済みか
			continue;
		}
		used[t] = true;
		dist[t] = d;
		for (P e : G[t]) {
			if (dist[e.second] <= d + e.first) {	//枝刈り
				continue;
			}
			q.push(P(d + e.first, e.second));
		}
	}
}

signed main() {
	ll n;

	cin >> n;

	G[0].push_back(make_pair(1, 1));

	ll x;

	FOR(i, 1, n + 1) {
		bitset<20> bs(i);
		x = bs.count();
		
		if (i - x > 0) {
			G[i].push_back(make_pair(1, i - x));
		}
		
		if (i + x < n + 1) {
			G[i].push_back(make_pair(1, i + x));
		}
	}

	dijkstra(0);

	if (dist[n] != INF) {
		cout << dist[n] << endl;
	}
	else {
		cout << -1 << endl;
	}
}