import java.util.*;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int N = sc.nextInt();
        int [] c = new int [N+1];
        c[1]=1;
        Queue<Integer> q = new LinkedList<>();
        q.add(1);
        while(!q.isEmpty()){
            int t = q.poll();
            int p = Integer.bitCount(t);
            int b = t-p;
            int f = t+p;
            if(b>0&&c[b]==0){
                c[b]=c[t]+1;
                q.add(b);
            }
            if(f<=N&&c[f]==0){
                c[f]=c[t]+1;
                q.add(f);
            }
        }
        if(c[N]==0)c[N]=-1;
        System.out.println(c[N]);
    }
}