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

public class Main {

    public static void main(String[] args) throws Exception {

        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));

        int N = Integer.parseInt(br.readLine());

        int[] cource = new int[N + 1];

        ArrayList<Integer> now = new ArrayList();

        now.add(1);
        cource[1] = 1;
        for (int i = 2; true; i++) {
            ArrayList<Integer> next = new ArrayList();

            for (int tmp : now) {
                if (tmp == N) {
                    System.out.println(cource[N]);
                    return;
                }
                int bit = bitCount(tmp);

                if (tmp + bit <= N && cource[tmp + bit] == 0) {
                    cource[tmp + bit] = i;
                    next.add(tmp + bit);
                }

                if (tmp + bit >= 1 && cource[tmp - bit] == 0) {
                    cource[tmp - bit] = i;
                    next.add(tmp - bit);
                }
            }
            if (next.isEmpty()) {
                System.out.println(-1);
                return;
            }

            now = (ArrayList<Integer>) next.clone();
        }
    }

    private static int bitCount(int source) {
        int count = 0;
        for (int i = 8192; source > 0; i = i / 2) {
            if (source >= i) {
                source -= i;
                count++;
            }
        }
        return count;
    }
}