#include <iostream>
#include <vector>
#include <algorithm>
#include <string>
#include <sstream>
#include <cstring>
#include <cstdio>
#include <cstdlib>
#include <cmath>
#include <queue>
#include <stack>
#include <map>
#include <set>
#include <numeric>
#include <cctype>
#include <tuple>
#include <climits>
#include <bitset>
#include <cassert>
#include <random>
#include <typeinfo>

#ifdef _MSC_VER
#include <agents.h>
#endif

#define FOR(i, a, b) for(int i = (a); i < (int)(b); ++i)
#define rep(i, n) FOR(i, 0, n)
#define ALL(v) v.begin(), v.end()
#define REV(v) v.rbegin(), v.rend()
#define MEMSET(v, s) memset(v, s, sizeof(v))
#define UNIQUE(v) (v).erase(unique(ALL(v)), (v).end())
#define MP make_pair
#define MT make_tuple

using namespace std;

typedef long long ll;
typedef pair<int, int> P;

int bt[10010];
bool is_not_visit[10010];

const int INF = 1.0e9;

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

	int N;
	cin >> N;
	rep(i, N + 1) is_not_visit[i] = true;

	bt[0] = 0;
	FOR(i, 1, N + 1) bt[i] = bt[i & (i-1)] + 1;

	int now = 1;
	int step = 1;

	queue<P> que;
	que.push(P(1, 1));
	while(que.size()){
		P p = que.front();
		que.pop();
		int pt = p.first;
		int step = p.second;

		is_not_visit[pt] = false;
		if(pt == N) {
			cout << step << endl;
			return 0;
		}

		int f = pt + bt[pt];
		int b = pt - bt[pt];
		step++;
		if(f <= N && is_not_visit[f]) {
			que.push(P(f, step));
		}
		if(b >= 1 && is_not_visit[b]) {
			que.push(P(b, step));
		}
	}
	cout << -1 << endl;
	return 0;
}