import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.ArrayDeque;
import java.util.ArrayList;
import java.util.Queue;

public class No3 {

	public static void main(String[] args) throws IOException{
		//ビットすごろく
		int N = Integer.parseInt(readStr()[0]) , d = 0 , pl , mi;
		int[] root = new int[N + 1];
		root[1] = 1;
		Queue<Integer> qu = new ArrayDeque<>();
		qu.add(1);
		
		
		while(qu.size() > 0) {
			d = qu.poll();
			pl = d + Integer.bitCount(d);
			mi = d - Integer.bitCount(d);
			
			if(pl <= N && (root[pl] == 0 || root[pl] > root[d] + 1)) {
				root[pl] = root[d] + 1;
				if(pl < N) {
					qu.add(pl);
				}
			}
			
			if(mi >= 1 && (root[mi] == 0 || root[mi] > root[d] + 1)) {
				root[mi] = root[d] + 1;
				qu.add(mi);
			}
		}
		
		System.out.println(root[N] == 0 ? -1 : root[N]);

	}
	
	public static String[] readStr() throws IOException{
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		ArrayList<String> list = new ArrayList<>();

		do {
			list.add(br.readLine());
		}while(br.ready());

		br.close();

		String[] text = new String[list.size()];
		list.toArray(text);

		return text;

	}

}