#define _CRT_SECURE_NO_WARNINGS
#include <string>
#include <vector>
#include <algorithm>
#include <numeric>
#include <set>
#include <map>
#include <queue>
#include <iostream>
#include <sstream>
#include <cstdio>
#include <cmath>
#include <ctime>
#include <cstring>
#include <cctype>
#include <cassert>
#include <limits>
#include <functional>
#include <stack>
#include <array>
#include <fstream>
#include <deque>
#include <bitset>


#define REP(i,n) for(int (i) = 0;(i) < (n) ; ++(i))
#define REPS(a,i,n) for(int (i) = (a) ; (i) < (n) ; ++(i))
#if defined(_MSC_VER)||__cplusplus > 199711L
#define AUTO(r,v) auto r = (v)
#else
#define AUTO(r,v) typeof(v) r = (v)
#endif
#define ALL(c) (c).begin() , (c).end()
#define EACH(it,c) for(AUTO(it,(c).begin());it != (c).end();++it)
#define LL long long
#define int LL
#define INF  99999999
#define DIV 1000000007
#define QUICK_CIN ios::sync_with_stdio(false); cin.tie(0);
#define InitArr1(c,n) memset(&c[0],0,sizeof(int)*n)
#define InitArr2(c,n) memset(&c[0][0],0,sizeof(int)*n)

template<class T>
bool valid(T x, T w) { return 0 <= x&&x < w; }

int di[4] = { 1, -1, 0, 0 };
int dj[4] = { 0, 0, 1, -1 };

using namespace std;

//-----------------------------------------------------------------------------------------------
//-----------------------------------------------------------------------------------------------
//-----------------------------------------------------------------------------------------------

int n;
int ed[11000];

void f(int i) {
	if (i == n)
		return;

	int t = 0;
	int ii = i;

	while (ii) {
		t += ii % 2;
		ii /= 2;
	}

	if (i - t > 1 && ed[i-t] > ed[i]+1) {
		ed[i - t] = ed[i] + 1;
		f(i - t);
	}

	if (i + t < n+1 && ed[i + t] > ed[i] + 1) {
		ed[i + t] = ed[i] + 1;
		f(i + t);
	}
}

signed main()
{
	QUICK_CIN;

	while (cin >> n) {
		REP(i, 11000) {
			ed[i] = INF;
		}
		ed[1] = 0;

		f(1);
		if (ed[n] == INF) {
			cout << -1 << endl;
		}
		else {
			cout << ed[n] << endl;
		}
	}
}