#include <cstdio>
#include <algorithm>
#include <stack>
#include <queue>
#include <deque>
#include <vector>
#include <string>
#include <string.h>
#include <cstdlib>
#include <ctime>
#include <cmath>
#include <map>
#include <set>
#include <iostream>
#include <sstream>
#include <cctype>
#define fi first
#define se second
#define rep(i,n) for(int i = 0; i < n; ++i)
#define rrep(i,n) for(int i = 1; i <= n; ++i)
#define drep(i,n) for(int i = n-1; i >= 0; --i)
#define gep(i,g,j) for(int i = g.head[j]; i != -1; i = g.e[i].next)
#define each(it,c) for(__typeof((c).begin()) it=(c).begin();it!=(c).end();it++)
#define rng(a) a.begin(),a.end()
#define maxs(x,y) x = max(x,y)
#define mins(x,y) x = min(x,y)
#define pb push_back
#define sz(x) (int)(x).size()
#define pcnt __builtin_popcount
#define snuke srand((unsigned)clock()+(unsigned)time(NULL));
inline int in() { int x; scanf("%d",&x); return x;}
using namespace std;
typedef long long int ll;
typedef pair<int,int> P;
typedef vector<int> vi;

const int MX = 10005, INF = 1000010000;
const ll LINF = 1000000000000000000ll;
const double eps = 1e-10;
const int di[] = {-1,0,1,0}, dj[] = {0,-1,0,1}; //^<v>

int dp[MX];

int main(){
  int n;
  cin >> n;
  rrep(i,n) dp[i] = INF;
  dp[1] = 1;
  queue<int> q;
  q.push(1);
  while (q.size()) {
    int v = q.front(); q.pop();
    int x = pcnt(v);
    if (v-x > 0 && dp[v-x] == INF) {
      dp[v-x] = dp[v]+1;
      q.push(v-x);
    }
    if (v+x <= n && dp[v+x] == INF) {
      dp[v+x] = dp[v]+1;
      q.push(v+x);
    }
  }
  if (dp[n] == INF) dp[n] = -1;
  cout << dp[n] << endl;
  return 0;
}