#include <bits/stdc++.h>
using namespace std;

#define rep(i,n) for(int i=0;i<(n);++i)
#define loop for(;;)
#define trace(var) cerr<<">>> "<<#var<<" = "<<var<<endl;
#define all(v) begin(v),end(v)
#define pb push_back
#define inf (1e9)
#define eps (1e-9)
using Integer = long long;
using Real = long double;
const Real PI = acosl(-1);
using P = pair<int, int>;

template<class S, class T> inline
ostream& operator<<(ostream&os, pair<S,T> p) {
  return os << '(' << p.first << ", " << p.second << ')';
}

template<class S, class T> inline
ostream& operator<<(ostream&os, tuple<S,T> t) {
  return os << '('
    << get<0>(t) << ", "
    << get<1>(t) << ')';
}

template<class S, class T, class U> inline
ostream& operator<<(ostream&os, tuple<S,T,U> t) {
  return os << '('
    << get<0>(t) << ", "
    << get<1>(t) << ", "
    << get<2>(t) << ')';
}

template<class T> inline
ostream& operator<<(ostream&os, set<T> v) {
  os << "(set";
  for (T item: v) os << ' ' << item;
  os << ")";
  return os;
}

template<class T> inline
ostream& operator<<(ostream&os, vector<T> v) {
  if (v.size() == 0) { return os << "(empty)"; }
  os << v[0];
  for (int i=1, len=v.size(); i<len; ++i) os << ' ' << v[i];
  return os;
}

template<class T> inline
istream& operator>>(istream&is, vector<T>&v) {
  rep (i, v.size()) is >> v[i];
  return is;
}

//           ^   >  v   <
int dx[] = { -1, 0, 1,  0 };
int dy[] = {  0, 1, 0, -1 };

using vi = vector<int>;
using vvi = vector<vi>;
using vd = vector<double>;
using vvd = vector<vd>;
using vb = vector<bool>;

int main() {
  int n; cin >> n;
  if (n==1){ puts("1");return 0;}

  vi pc(n);
  for (int i = 1; i <= n; ++i) {
    pc[i-1] = __builtin_popcount(i);
  }

  vi table(n);
  rep (i, n) table[i] = inf;
  table[0] = 1;

  stack<int> s;
  s.push(0);

  while (not s.empty()) {
    int u = s.top(); s.pop();
    vi vs = { u - pc[u], u + pc[u] };
    for (int v: vs) {
      if (v < 0 or v >= n) continue;
      if (table[v] > table[u] + 1) {
        table[v] = table[u] + 1;
        s.push(v);
      }
    }
  }

  int ans = table[n-1] < inf ? table[n-1] : -1;
  cout<<ans<<endl;
  return 0;
}