#include <bits/stdc++.h>
#define rep(i, a, n) for (int i = a; i < n; i++)
#define repr(i, a, n) for (int i = n - 1; i >= a; i--)
using namespace std;
using ll = long long;
using P = pair<int, int>;
template <typename T> void chmin(T &a, T b) { a = min(a, b); }
template <typename T> void chmax(T &a, T b) { a = max(a, b); }

int main() {
  ios::sync_with_stdio(false);
  cin.tie(0);

  int n;
  cin >> n;

  int x = 1, ans = 1;
  map<int, bool> is_visited;

  while (true) {
    ans++;
    int v = __builtin_popcount(x);
    if (x + v > n)
      x -= v;
    else
      x += v;
    if (is_visited[x]) {
      cout << -1 << endl;
      return 0;
    } else
      is_visited[x] = true;

    if (x == n)
      break;
  }

  cout << ans << endl;
}