import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.HashMap;

public class Main {
	public static void main(String[] args) {
	      BufferedReader stdReader =new BufferedReader(new InputStreamReader(System.in));
	      try {
		      int N = Integer.parseInt(stdReader.readLine());
		      int[] c = new int[N+1];
		      for(int i=1;i<N+1;i++){
		    	  int count = 0;
		    	  String bin = Integer.toBinaryString(i);
		    	  for(int j=0;j<bin.length();j++){
		    		  if((""+bin.charAt(j)).equals("1")) count++;
		    	  }
		    	  c[i] = count;
		      }
		      int result = 1;
		      int here = 1;
		      HashMap<Integer , String> hMap = new HashMap<>();
		      while(here<N){
		    	  if(hMap.containsKey(here)){
		    		  result = -1;
		    		  break;
		    	  }else{
		    		  hMap.put(here, "");
		    	  }
		    	  
		    	  if(here + c[here]<=N) here += c[here];
		    	  else if(here + c[here]>N) here -= c[here];		    	  
	    		  result++;
		      }  
		      System.out.println(result);
	    	  } catch (IOException e) {
			e.printStackTrace();
	      }
	}	
}