import java.util.Arrays;
import java.util.Scanner;

public class Main {
    
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        
        int N = sc.nextInt();
        
        if (N == 1) {
            System.out.println(1);
            return;
        }
        
        int[] map = new int[N+1];
        for (int i = 1; i <= N; i++) {
            map[i] = Integer.bitCount(i);
        }
        
        int[] dp = new int[N+1];
        Arrays.fill(dp, Integer.MAX_VALUE-500);
        dp[1] = map[1];
        
        boolean changed = true;
        while(changed) {
            changed = false;
            for (int i = 1; i <=N; i++) {
                if (i-map[i] > 0 && dp[i-map[i]] > dp[i]+1) {
                    dp[i-map[i]] = dp[i]+1;
                    changed = true;
                }
                if (i+map[i] <= N && dp[i+map[i]] > dp[i]+1) {
                    dp[i+map[i]] = dp[i]+1;
                    changed = true;
                }
            }
        }
        
        System.out.println(dp[N] == Integer.MAX_VALUE-500 ? -1 : dp[N]);
    }
}