import java.util.*;

class Main{
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		int[] p = new int[n];
		Queue<Integer> que = new ArrayDeque<>();
		que.add(0);
		Integer a;
		while((a = que.poll()) != null && p[n-1] == 0){
			int b = pop(a+1);
			if(a + b < n && p[a+b] == 0){
				p[a+b] = p[a] + 1;
				que.add(a+b);
			}
			if(p[a-b]==0){
				p[a-b] = p[a] + 1;
				que.add(a-b);
			}
		}
		System.out.println(p[n-1] == 0 ? -1 : p[n-1]);
	}
	static int pop(int n){
		int r = 0;
		while(n!=0){
			r+=n%2;
			n/=2;
		}
		return r;
	}
}