#include <bits/stdc++.h>
using namespace std;

// 基本テンプレート
struct cww{cww(){ios::sync_with_stdio(false);cin.tie(0);cout << fixed << setprecision(0);}}star;
#define P(x) cout << (x) << endl
#define p(x) cout << (x)
#define ALL(c) (c).begin(), (c).end()
#define RALL(c) (c).rbegin(), (c).rend()
#define MAT(type, c, m, n) vector<vector<type>> c(m, vector<type>(n));for(auto& r:c)for(auto& i:r)cin>>i;
#define VV(type, c, m, n, i) vector<vector<type>> c(m, vector<type>(n, i));
#define REP(i,a,n) for(int i=(a), i##_len=(n); i<i##_len; ++i)
#define RREP(i,a,n) for(int i=(a); i>n; --i)
#define perm(c) sort(ALL(c));for(bool c##p=1;c##p;c##p=next_permutation(ALL(c)))
#define PB push_back
#define EM emplace
#define EB emplace_back
#define BI back_inserter
#define MP make_pair
#define cauto const auto&
#define UNIQUE(v) v.erase( unique(ALL(v)), v.end() );
#define len(x) ((int)(x).size())
#define GET_ARRAY_SIZE(a)   (sizeof(a)/sizeof(a[0]))


// 型
typedef long long ll;
typedef unsigned long long ull;
typedef pair<int, int> pii;
typedef pair<string, string> pss;
typedef pair<string, int> psi;
typedef pair<int, string> pis;
typedef vector<int> vi;
typedef vector<double> vd;
typedef vector<long> vl;
typedef vector<long long> vll;
typedef vector<string> vs;

// 定数
#define PI acos(-1.0)
constexpr int EPS = (1e-9);
constexpr int INF = 100000000;

#define MAX 10001

vi N(MAX + 1, 0);
int limit;

int bit_num(int n) {
	if (n == 1 || n == 2) return 1;
	int sum = 1;
	while (n > 2) {sum += (n % 2 == 1); n /= 2; }
	return sum;
}

int mas(int n) {
	if (n > limit) return 0;

	if(N[n + bit_num(n)] == 0) {N[n + bit_num(n)] = N[n] + 1; mas(n + bit_num(n)); };
	if(N[n - bit_num(n)] == 0) {N[n - bit_num(n)] = N[n] + 1; mas(n - bit_num(n)); };

	return 0;

}

int main() {
	N[0] = N[1] = 1;
	cin >> limit;
	mas(1);
	P(N[limit] != 0 ? N[limit] : -1);















    return 0;
}