#include <vector>
#include <list>
#include <map>
#include <set>
#include <deque>
#include <stack>
#include <bitset>
#include <algorithm>
#include <functional>
#include <numeric>
#include <utility>
#include <sstream>
#include <iostream>
#include <iomanip>
#include <cstdio>
#include <cmath>
#include <cstdlib>
#include <cctype>
#include <string>
#include <cstring>
#include <ctime>
#include <queue>
#include <immintrin.h>
using namespace std;

//inline int popcount64(uint64_t x) {	return _mm_popcnt_u64(x);}
int popcount(int x){return  __builtin_popcount(x);}
//conversion
//------------------------------------------
inline int toInt(string s) {int v; istringstream sin(s);sin>>v;return v;}
template<class T> inline string toString(T x) {ostringstream sout;sout<<x;return sout.str();}

//math
//-------------------------------------------
template<class T> inline T sqr(T x) {return x*x;}

//typedef
//------------------------------------------
typedef vector<int> VI;
typedef vector<VI> VVI;
typedef vector<string> VS;
typedef pair<int, int> PII;
typedef long long LL;

//container util
//------------------------------------------
#define ALL(a)  (a).begin(),(a).end()
#define RALL(a) (a).rbegin(), (a).rend()
#define PB push_back
#define MP make_pair
#define SZ(a) int((a).size())
#define EACH(i,c) for(typeof((c).begin()) i=(c).begin(); i!=(c).end(); ++i)
#define EXIST(s,e) ((s).find(e)!=(s).end())
#define SORT(c) sort((c).begin(),(c).end())

//repetition
//------------------------------------------
#define FOR(i,a,b) for(int i=(a);i<(b);++i)
#define REP(i,n)  FOR(i,0,n)

//constant
//--------------------------------------------
const double EPS = 1e-10;
const double PI  = acos(-1.0);

//clear memory
#define CLR(a) memset((a), 0 ,sizeof(a))

//debug
#define dump(x)  cerr << #x << " = " << (x) << endl;
#define debug(x) cerr << #x << " = " << (x) << " (L" << __LINE__ << ")" << " " << __FILE__ << endl;

int ans=INT32_MAX;
int table[12345];
int N;
bool dfs(int num,int pos){

    table[pos]=min(table[pos],num);
    if(table[pos]<num){return false;}
    //if(pos>N){return false;}
    if(pos<=0){return false;}
    if(pos==N){ans=min(ans,num);return true;}

    if(dfs(num+1,pos+popcount(pos))){return true;}
    if(dfs(num+1,pos-popcount(pos))){return true;}
    
}


int main(){
    memset(table,114514,sizeof(table));
   //cerr<<popcount(3)<<endl;
    cin>>N;
    if(N==1){cout<<0<<endl;}
    if(dfs(0,1)){cout<<ans+1<<endl; }
    else{
        cout<<-1<<endl;
    }

}