import java.util.*;

public class Main {
    public static void main(String[] args) throws Exception {
        
        Scanner sc = new Scanner(System.in);
        
        int n = sc.nextInt();
        boolean[] seen = new boolean[n+1];
        seen[0] = true;
        
        LinkedList<Integer> q = new LinkedList<>();
        LinkedList<Integer> next_q = new LinkedList<>();
        q.push(1);
        
        int turn = 1;
        boolean flag = false;
        while(q.size() > 0){
            
            int v = q.pop();
            
            if(v == n){
                flag = true;
                break;
            }
            
            seen[v] = true;
            
            int left = v - getBitCount(v);
            int right = v + getBitCount(v);
            
            if(left > 0 && !seen[left]){
                q.push(left);
            }
            if(right <= n && !seen[right]){
                q.push(right);
            }
            
            turn++;
            
        }
        
       
        System.out.println(flag ? turn : -1);
        
    }
    
    private static int getBitCount(int bits){
        bits = (bits & 0x55555555) + (bits >> 1 & 0x55555555);
        bits = (bits & 0x33333333) + (bits >> 2 & 0x33333333);
        bits = (bits & 0x0f0f0f0f) + (bits >> 4 & 0x0f0f0f0f);
        bits = (bits & 0x00ff00ff) + (bits >> 8 & 0x00ff00ff);
        
        return (bits & 0x0000ffff) + (bits >>16 & 0x0000ffff);
    }
   
}