import java.util.*;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        int[] cnt = new int[n];
        Queue<Integer> target = new ArrayDeque<>();
        target.add(1);
        cnt[0]=1;
        while (!target.isEmpty()){
            int now = target.poll();
            if(now==n){
                System.out.println(cnt[n-1]);
                return;
            }
            int bit = Integer.bitCount(now);
            if(now-bit>=1 && cnt[now-bit-1] ==0){target.add(now-bit);cnt[now-bit-1] = cnt[now-1]+1;}
            if(now+bit<=n && cnt[now+bit-1] ==0){target.add(now+bit);cnt[now+bit-1] = cnt[now-1]+1;}
        }
        System.out.println(-1);
    }
}