#include <iostream>
using namespace std;

int N;

int calcbit(int num){
  int result=0;
  do{result+=(num%2);
    num/=2;
  }while(num);
  return result;
}



int main(){
  int carol[10001]={0,1};
  int checksheet[10001]={0,1};
  int num,flag;
  cin >> N;

do{
  flag=0;//flag whether we got a shorter root
  for(int i=1;i<=N;i++){
    if(checksheet[i]){//if we can go to i with a exist root
      num=calcbit(i);
//---------------
      if((i+num)<=N){//from the place we are, can go to the next place
        if(checksheet[i+num]){// [from] root to the place we can go has existed
          if(carol[i+num]>(carol[i]+1)){//but new is smaller
            carol[i+num]=carol[i]+1;
            flag=1;
          }
        }
        else{// [to] do not existed
          carol[i+num]=carol[i]+1;
          flag=1;
          checksheet[i+num]=1;
        }
      }
//---------------
      if((i-num)>1){//from the place we are, can go to the next place
        if(checksheet[i-num]){// [from] root to the place we can go has existed
          if(carol[i-num]>(carol[i]+1)){//but new is smaller
            carol[i-num]=carol[i]+1;
            flag=1;
          }
        }
        else{// [to] do not existed
          carol[i-num]=carol[i]+1;
          flag=1;
          checksheet[i-num]=1;
        }
      }
    }

  }
}while(flag);

if(checksheet[N])cout << carol[N] << endl;
else cout << "-1" << endl;

}