#include <stdio.h>

int fnCheckOneNum(int n){
  int result=0;
  while(n>0){
    if(n%2==1) ++result;
    n/=2;
  }
  return result;
}

int main(){
  int n;
  int now=1, now_tmp;
  int d, i=0, j;
  int move_cnt=1, back_cnt=0;
  
  scanf("%d", &n);
  while(now!=n){
    d=fnCheckOneNum(now);
    if(now+d<=n)now+=d;
    else{
      ++i;
      ++back_cnt;
      printf("back_count:%d\n", back_cnt);
      for(j=0; j<back_cnt; ++j){
	now-=d;
	if(now<1){
	  printf("-1\n");
	  return 0;
	}
      }
    }

    ++move_cnt;
  }
  printf("%d\n", move_cnt);

  return 0;
}