import java.util.*;
import java.util.Arrays;

public class Main {
	static int[] isOk = new int[10000];
	static int n;
	public static void main(String[] args){
		Arrays.fill(isOk, 0);
		Scanner sc = new Scanner(System.in);
		n = sc.nextInt();
		isOk[0] = 1;
		check(1);
		if(isOk[n-1]==0){
			System.out.println(-1);
		}else{
			System.out.println(isOk[n-1]);
		}
	}

	static void check(int x){
			int sum = 0;
			int xx = x;
			do{
				sum += xx%2;
				xx = xx/2;
			}while(xx>0);
			if(x+sum<=n){
				if(isOk[x+sum-1]==0){
					isOk[x+sum-1]=isOk[x-1]+1;
					check(x+sum);
				}
			}
			if(x-sum>0){
				if(isOk[x-sum-1]==0){
					isOk[x-sum-1]=isOk[x-1]+1;
					check(x-sum);
				}
			}
		
	}
}