package yukicoder;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Comparator;
import java.util.PriorityQueue;
import java.util.StringTokenizer;

public class P3 {
	static long[] dist;
	static long INF = 100000000000000000L;
	static ArrayList<ArrayList<Edge>> adj;
	
	static class Edge {
		int to;
		long w;
		Edge(int _to, long _w) {
			this.to = _to;
			this.w = _w;
		}
		
		@Override
		public String toString() {
			return "(to=" + to + ", w=" + w + ")";
		}
		
	}
	
	static class NextNode {
		int id;
		long cost;
		NextNode(int _id, long _cost) {
			id = _id; cost = _cost;
		}
	}
	
	static void initG(int V) { // V: the number of vertexes
		for(int i=0; i<V; i++) {
			adj.add(new ArrayList<Edge>());
		}
	}

	static void dijkstra(int s) {
		Arrays.fill(dist, INF);
		dist[s] = 0;
		PriorityQueue<NextNode> pq = new PriorityQueue<NextNode>(new Comparator<NextNode>() {
			public int compare(NextNode n1, NextNode n2) {
				if(n1.cost > n2.cost) return 1;
				else if(n1.cost==n2.cost) return 0;
				else return -1;
			}
		});
		pq.add(new NextNode(s, 0));
		while(!pq.isEmpty()) {
			NextNode cn = pq.poll();
			if(cn.cost > dist[cn.id]) continue;
			for(Edge e : adj.get(cn.id)) {
				if(cn.cost + e.w < dist[e.to]) {
					dist[e.to] = cn.cost + e.w;
					pq.add(new NextNode(e.to, dist[e.to]));
				}
			}
		}
	}
	
	public static void main(String[] args) throws IOException {
		MyScanner sc = new MyScanner(System.in);
		int n = sc.nextInt();
		dist = new long[n+1];
		adj = new ArrayList<ArrayList<Edge>>(n+1);
		initG(n+1);
		for(int i=1; i<=n; i++) {
			int d = digit(i);
			if(0<=i+d && i+d<=n) adj.get(i).add(new Edge(i+d, 1));
			if(0<=i-d && i-d<=n) adj.get(i).add(new Edge(i-d, 1));
		}
		dijkstra(1);
		if(dist[n]>=INF) {
			System.out.println(-1);
		} else {
			System.out.println(dist[n]+1);
		}
	}
	
	public static int digit(int n) {
		int ret = 0;
		while(n>0) {
			if(n%2==1) ret++;
			n/=2;
		}
		return ret;
	}

	static class MyScanner
	{
		BufferedReader br;
		StringTokenizer st;
		public MyScanner(InputStream s)
		{
			br=new BufferedReader(new InputStreamReader(s));
		}
		public String nextLine() throws IOException
		{
			return br.readLine();
		}
		public String next() throws IOException
		{
			while(st==null || !st.hasMoreTokens())
				st=new StringTokenizer(br.readLine());
			return st.nextToken();
		}
		public int nextInt() throws IOException
		{
			return Integer.parseInt(next());
			
		}
		public double nextDouble() throws IOException
		{
			return Double.parseDouble(next());
		}
		public boolean ready() throws IOException
		{
			return br.ready();
		}
		public long nextLong() throws IOException
		{
			return Long.parseLong(next());
		}
	}
	
}