#include <bits/stdc++.h>
using namespace std;
typedef unsigned long long ul;
typedef signed long long ll;
ul over = 1000000007;

typedef tuple< ll, ll > cell;

ll nbit(ll n)
{
  ll ret = 0;
  while (n > 0) {
    ret += n%2;
    n /= 2;
  }
  return ret;
}

int main(void)
{
  cin.tie(0);
  ios::sync_with_stdio(false);
  cout << fixed;
  ll n;
  cin >> n;
  vector< bool > visited(n+1);
  for (ll i = 0; i <= n; ++i) visited[i] = false;
  priority_queue< cell , vector< cell >, greater< cell >> q;
  cell c = make_tuple(1, 1);
  q.push(c);
  visited[1] = true;
  while (!q.empty()) {
    auto nc = q.top();
    q.pop();
    ll nstep = get<0>(nc), nidx = get<1>(nc);
    if (nidx == n) {cout << nstep << endl; return 0;}
    ll nb = nbit(nidx);
    if (nidx-nb >= 1 && !visited[nidx-nb]) {
      cell cc = make_tuple(nstep+1, nidx-nb);
      q.push(cc);
      visited[nidx-nb] = true;
    }
    if (nidx+nb <= n && !visited[nidx+nb]) {
      cell cc = make_tuple(nstep+1, nidx+nb);
      q.push(cc);
      visited[nidx+nb] = true;
    }
  }
  cout << -1 << endl;
  return 0;
}