package yukicoder;



import java.util.*;
import java.lang.*;
import java.io.*;

/* Name of the class has to be "Main" only if the class is public. */
class Ideone
{
	public static void main (String[] args) throws java.lang.Exception
	{
		// your code goes here
		Scanner sc = new Scanner(System.in);
    	int N = sc.nextInt();
		//long start = System.currentTimeMillis();
    	//無理か判断
    	int m = 1;
    	int distance = 0;
    	int target;
    	int muripo = 0;
    	int count = 1;
    	while (m != N) {
    		count++;
    		distance = 0;
    		//System.out.println("----count:" + count);
    		char[] c = Integer.toBinaryString(m).toCharArray();
    		for (int i = 0;i < c.length;i++) {
    			if (c[i] == '1') {
    				distance++;
    			}
    		}
    		//get target
    		if (N < m + distance) {
    			target = m - distance;
    			// 以前同じmで戻っている
    			if (m == muripo) {
    				System.out.println(-1);
    				//long end = System.currentTimeMillis();
    				//System.out.println((end - start)  + "ms");
    				return;
    			}
    			if (0 == muripo) {
    				muripo = m;
    			}
    		} else {
    			target = m + distance;
    		}
    		//System.out.println("target:" + target);
    		//move
    		m = target;
    		//System.out.println("m:" + m);
    	}
    	//long end = System.currentTimeMillis();
    	//System.out.println((end - start)  + "ms");
    	System.out.println(count);
	}
}