#include <bits/stdc++.h>
#define ALL(x) (x).begin(), (x).end()
#define RALL(x) (x).rbegin(), (x).rend()
#define FSP(x) fixed << setprecision(x)
using namespace std;
using ll = long long;
constexpr ll INF = LLONG_MAX;
//constexpr ll P = 1e9 + 7;
//constexpr ll P = 998244353;
constexpr long double PI = acosl(-1);
void Yes() {cout << "Yes\n";}
void No() {cout << "No\n";}
void YES() {cout << "YES\n";}
void NO() {cout << "NO\n";}

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

	ll n;
	cin >> n;
	if (n == 1) {
		cout << 1 << endl;
		return 0;
	}

	vector<vector<ll>> v(n);
	for (ll i = 0; i < n; i++) {
		ll m = __builtin_popcount(i + 1);
		if (0 <= i - m) v[i].push_back(i - m);
		if (i + m < n) v[i].push_back(i + m);
	}

	queue<ll> task;
	task.push(0);
	vector<bool> seen(n, false);
	seen[0] = true;
	ll depth = 1;
	while (task.size()) {
		ll sz = task.size();
		while (sz--) {
			ll x = task.front();
			task.pop();
			for (auto i : v[x]) {
				if (i == n - 1) {
					cout << depth + 1 << endl;
					return 0;
				}
				if (seen[i]) continue;
				task.push(i);
				seen[i] = true;
			}
		}
		depth++;
	}
	cout << -1 << endl;
}