#include <set>
#include <map>
#include <list>
#include <queue>
#include <stack>
#include <cmath>
#include <ctype.h>
#include <ctime>
#include <cstdio>
#include <vector>
#include <string>
#include <bitset>
#include <cctype>
#include <cstdlib>
#include <cstring>
#include <utility>
#include <numeric>
#include <complex>
#include <sstream>
#include <fstream>
#include <iomanip>
#include <cassert>
#include <iostream>
#include <iterator>
#include <algorithm>
#define aLL(g) (g).begin(),(g).end()
#define REP(i, x, n) for(int i = x; i < n; i++)
#define rep(i,n) REP(i,0,n)
#define F(i,j,k) fill(i[0],i[0]+j*j,k)
#define P(p) cout<<(p)<<endl;
#define EXISt(s,e) ((s).find(e)!=(s).end())
#define INF 1<<25
#define MAX 100000000
#define pb push_back
using namespace std; 
typedef vector<int> vi;
typedef vector<long long> vl;
typedef vector<double> vd;
typedef pair<int,int> pii;
typedef pair<long,long> pll;
typedef long long ll;
int dx[] = {0,1,0,-1};
int dy[] = {-1,0,1,0};

int sttoi(std::string str){int ret;std::stringstream ss;ss << str;ss >> ret;return ret;}
int n;
int mini = 10000000;
bool field[10001];

int main(){
  cin >> n;
  int pos = 1;
  int step = 1;
  queue<pair<int,int> > q;
  q.push(make_pair(1,1));
  while(!q.empty()){
    int pos = q.front().first;
    int step = q.front().second;
    q.pop();
    if(pos == n){
      cout << step << endl;
      return 0;
    }
    int count = 0;
    int num = pos;
    while(num > 0){
      if(num % 2 == 1){
        count++;
      }
      num >>= 1;
    }
    field[pos] = true;
    if(pos+count < n+1 && !field[pos+count])q.push(make_pair(pos+count,step+1));
    if(pos-count >= 1 && !field[pos-count])q.push(make_pair(pos-count,step+1));
  }
  cout << -1 << endl;
}