import java.util.*;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int N = sc.nextInt();
        boolean [] boo = new boolean [N+1];
        int [] c = new int [N+1];
        for(int i=2; i<=N; i++){
            c[i]=Integer.MAX_VALUE;
        }
        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]=Math.min(c[b],c[t]+1);
                if(boo[b]==false)q.add(b);
                boo[b]=true;
            }
            if(f<=N){
                c[f]=Math.min(c[f],c[t]+1);
                if(boo[f]==false)q.add(f);
                boo[f]=true;
            }
        }
        if(c[N]==0)c[N]=-1;
        System.out.println(c[N]);
    }
}