#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>
#define rep(i,n) for(int (i)=0;(i)<(int)(n);++(i))
#define rer(i,l,u) for(int (i)=(int)(l);(i)<=(int)(u);++(i))
#define reu(i,l,u) for(int (i)=(int)(l);(i)<(int)(u);++(i))
#if defined(_MSC_VER) || __cplusplus > 199711L
#define aut(r,v) auto r = (v)
#else
#define aut(r,v) __typeof(v) r = (v)
#endif
#define each(it,o) for(aut(it, (o).begin()); it != (o).end(); ++ it)
#define all(o) (o).begin(), (o).end()
#define pb(x) push_back(x)
#define mp(x,y) make_pair((x),(y))
#define mset(m,v) memset(m,v,sizeof(m))
#define INF 0x3f3f3f3f
#define INFL 0x3f3f3f3f3f3f3f3fLL
using namespace std;
typedef vector<int> vi; typedef pair<int,int> pii; typedef vector<pair<int,int> > vpii; typedef long long ll;
template<typename T, typename U> inline void amin(T &x, U y) { if(y < x) x = y; }
template<typename T, typename U> inline void amax(T &x, U y) { if(x < y) x = y; }

inline int popcount(unsigned x) {
	x = x - ((x >> 1) & 0x55555555); 
	x = (x & 0x33333333) + ((x >> 2) & 0x33333333);
	return ((x + (x >> 4) & 0xF0F0F0F) * 0x1010101) >> 24;
}
int main() {
	int N;
	while(cin >> N) {
		const int X = 20000;
		vector<bool> vis(N+1, false);
		vi q, nq;
		int d = 1, ans = INF;
		nq.push_back(1);
		while(!nq.empty()) {
			q.swap(nq);
			while(!q.empty()) {
				int i = q.back(); q.pop_back();
				if(vis[i]) continue;
				vis[i] = true;
				if(i == N) {
					ans = d;
					nq.clear();
					break;
				}
				int p = popcount(i);
				if(i - p >= 1)
					nq.push_back(i - p);
				if(i + p <= N)
					nq.push_back(i + p);
			}
			++ d;
		}
		printf("%d\n", ans == INF ? -1 : ans);
	}
	return 0;
}