package bitsgoroku;

import java.util.ArrayList;
import java.util.List;
import java.util.Scanner;

public class Bitsugoroku {
	public static void main(String[] args) {
		Scanner scan = new Scanner(System.in);
		int n = scan.nextInt();

		try {
			int result = 1;
			List<Integer> resultList = new ArrayList<Integer>();
			resultList.add(result);
			int binCount = changeBinary(result);
			int dameCount = 0;
			while (result != n) {
				if ((result + binCount) > n) {// nを超えてしまう時
					dameCount++;
					if (dameCount < 2) {
						binCount = changeBinary(result);
						result -= binCount;
						resultList.add(result);
					}else {

						break;
					}
				} else if ((result + binCount) < n) {// nを超えない時
					binCount = changeBinary(result);
					result += binCount;
					resultList.add(result);
				}
			}
			if(result != n) {
				System.out.println("-1");
			}else {
				System.out.println(resultList.size());
			}

		} catch (Exception e) {
			System.out.println(e);
		}
	}

	private static int changeBinary(int result) {
		String bin = Integer.toBinaryString(result);
		String[] binArray = bin.split("");

		// 2進数の１の数を数える
		int binCount = 0;
		for (String sss : binArray) {
			if (sss.equals("1")) {
				binCount++;
			}
		}
		return binCount;
	}

}