import java.util.*;

public class Main {
    private static Scanner sc = new Scanner(System.in);
    private static int[] dp;
    private static int n;
    public static void main(String[] args) throws Exception {
        n = sc.nextInt();
        dp = new int[n+1];
        dfs(1,1);
        
        int ret = dp[n];
        if (ret==0) {
            System.out.println(-1);
        } else {
            System.out.println(ret);
        }
    }
    
    private static void dfs(int i, int cnt) {
        if (dp[i]>0) return;
        dp[i] = cnt;
        int c = count(i);
        if (i-c>0) {
            dfs(i-c,cnt+1);
        }
        if (i+c<=n) {
            dfs(i+c,cnt+1);
        }
    }
    
    private static int count(int val) {
        String s = Integer.toBinaryString(val);
        int cnt = 0;
        for (int i = 0;i < s.length();i++) {
            if (s.charAt(i)=='1') cnt++;
        }
        return cnt;
    }
}