import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.ArrayDeque;
import java.util.ArrayList;
import java.util.Queue;

public class No3_2 {

	public static void main(String[] args) throws NumberFormatException, IOException {

		int N = Integer.parseInt(readStr()[0]);
		
		int[] mass = new int[N+1];
		mass[1] = 1;
		
		int i = 1,bit = 0;
		
		Queue<Integer> que = new ArrayDeque<>();
		que.add(1);
		
		while(!que.isEmpty()) {
			i= que.poll();
			
			bit = Integer.bitCount(i);
			
			if(mass[i] == 0) {
				continue;
			}
			
			if(mass[i-bit] > mass[i]+ 1 || mass[i-bit]== 0 ) {
				mass[i-bit] = mass[i] + 1;
				que.add(i-bit);
			}
			
			if(i+bit > N) {
				continue;
			}else if(mass[i+bit] > mass[i] + 1 || mass[i+bit] == 0) {
				mass[i+bit]= mass[i] + 1;
				que.add(i+bit);
			}
		}
		
		if(mass[N] == 0) {
			mass[N] = -1;
		}
		
		System.out.println(mass[N]);

	}
	
	public static String[] readStr() throws IOException{
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		ArrayList<String> list = new ArrayList<>();

		do {
			list.add(br.readLine());
		}while(br.ready());

		br.close();

		String[] text = new String[list.size()];
		list.toArray(text);

		return text;

	}

}