#include<cstdio>
#include<queue>
#include<utility>
#include<cstring>
#include<stack>
#include<algorithm>
#include<cmath>
#include<iostream>
#include<map>
#define MAX_N 100001
#define INF_INT 2147483647
#define INF_LL 9223372036854775807
#define REP(i,n) for(int i=0;i<(int)(n);i++)
void init(int n);
int find(int n);
void unite(int x,int y);
bool same(int x, int y);
int dx[4] = {1,0,0,-1};
int dy[4] = {0,1,-1,0};
using namespace std;
typedef long long int ll;
typedef pair<ll,ll> P;

int main()
{
  int N;
  cin >> N;
  bool visited[10001];
  fill(visited,visited+10001,false);
  queue<P> que;
  que.push(P(1,1));
  while(!que.empty()){
    P p = que.front();que.pop();
    if(p.first == N){
      cout << p.second << endl;
      return 0;
    }
    visited[p.first] = true;
    int b=0,c=p.first;
    while(c > 0){
      if(c & 1)b++;
      c >>= 1;
    }
    if(p.first+b <= N)if(!visited[p.first+b])que.push(P(p.first+b,p.second+1));
    if(p.first-b >= 1)if(!visited[p.first-b])que.push(P(p.first-b,p.second+1));
  }
  cout << -1 << endl;
  return 0;
}