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

#define int long long
#define rep(i,n) for(int i=0;i<(int)(n);i++)
#define repi(i,a,b) for(int i=(int)(a);i<(int)(b);i++)
#define all(x) (x).begin(),(x).end()
#define pb push_back
#define mp make_pair
#define mt make_tuple

typedef pair<int, int> pii;
typedef vector<int> vi;
typedef vector<vi> vvi;

const int inf = 1LL<<60;
const int mod = 1e9 + 7;
const double eps = 1e-9;

/*{
}*/

signed main()
{
  int n;
  cin >> n;

  vi dp(n+1, inf);
  dp[1] = 1;
  rep(i, n){
    repi(j, 1, n+1){
      int x = __builtin_popcount(j);
      if(j+x <= n) dp[j+x] = min(dp[j+x], dp[j]+1);
      if(j-x >= 1) dp[j-x] = min(dp[j-x], dp[j]+1);
    }
  }

  if(dp[n] == inf) cout << -1 << endl;
  else cout << dp[n] << endl;

  return 0;
}