#include<iostream>
using namespace std;

int takeSpeed(int n){
  int i(1), c(0), tmp(0);

  while(n > 0){
    c += n%2;
    n /= 2;
  }

  return c;
}

int main(){
  int N, pos(1), speed(0), c(1);
  cin >> N;

  while(pos != N){
    if(c > N){
      c= -1;
      break;
    }
    speed = takeSpeed(pos);
    pos += speed;
    c++;
  }

  cout << c << endl;
  
  return 0;
}