#include <iostream>
#include <vector>
#include <cstdint>
#include <limits>
#include <algorithm>
#include <tuple>

//解説読みました。Orz
//幅優先探索は難しいなぁ。

#define Test 0

typedef std::int16_t IntT;
typedef std::tuple<IntT, IntT> DType;
typedef std::vector<DType> Stack;
typedef std::vector<IntT> Stack2;
IntT BitCount(const IntT& v) {
	IntT C =0;

	for (IntT i = 0; i <= std::numeric_limits<IntT>::digits; i++) {
		C += (v&(1 << i)) > 0;
	}

	return C;
}

bool Rec(Stack2& S,const IntT& N,const IntT& V) {
	IntT B = BitCount(V);
	if (S.size() == 0) return false;
	if (V == N) return true;
	if (V > N)return false;
	if (V == 0) return false;
	
	//auto it = std::find(S.rbegin(), S.rend(), V+B);
	//if (it != S.rend()) return false;

	S.push_back(V + B);
	if (Rec(S, N, V + B) == true) return true;
	S.pop_back();
	auto it = std::find(S.rbegin(), S.rend(), V-B);
	if (it != S.rend()) return false;
	S.push_back(V - B);
	if (Rec(S, N,V - B) == true) return true;
	S.pop_back();
	return false;
}
/** /
IntT MakeHoge_2(const IntT& N) {
	Stack2 S;
	S.push_back(1);
	Rec(S, N,1);

	return S.back()==N? S.size():0;
}

/** /
std::size_t MakeHoge_1(const IntT& N) {
	Stack S;
	IntT C = 1;
	IntT B = 0;	
	S.push_back(std::make_tuple(C, 0));
	while (C != N && S.size() != 0) {
		if (std::get<1>(S.back()) == 2) {
			S.pop_back();
			continue;
		}
		C = std::get<0>(S.back());
		B = BitCount(C);
		if (std::get<1>(S.back()) == 0) {
			C += B;
		}
		else {
			C -= B;
		}
		std::get<1>(S.back())++;
		auto rit = std::find_if(S.rbegin(), S.rend(), [&](auto& o) {return std::get<0>(o) == C; });
		if (rit != S.rend()) {
			S.erase(rit.base(), S.rbegin().base());
		}
		else {
			if (C <= N) {
				S.push_back(std::make_tuple(C, 0));
			}
		}
	}
	return S.size();
}
/**/
IntT MakeHoge(const IntT& N) {
	IntT IV = -1;
	Stack2 S(N+1, IV);
	IntT Now = 1;
	bool F = true;
	IntT B = 0;
	IntT C = 0;
	S[1] = 0;
	while (F) {
		F = false;
		for (IntT i = 1; i < S.size(); i++) {
			if (S[i] == -1) continue;
			B = BitCount(i);
			if (i - B > 0 && S[i - B] == -1) {
				S[i - B] = i;
				F = true;
			}
			if (i + B <= N&& S[i + B] == -1) {
				S[i + B] = i;
				F = true;
			}
		}
	}
	
	if (S[N] == -1) return -1;
	Now = N;
	while (Now != 1) {
		C++;
		Now = S[Now];
	}

	return C+1;

}

/**/
int main() {

	IntT R = 0;
	IntT N = 0;

#if Test
	N = 5;
	R = MakeHoge(N);
	std::cout << ((R == 0) ? -1 : R) << std::endl;
	N = 11;
	R = MakeHoge(N);
	std::cout << ((R == 0) ? -1 : R) << std::endl;
	N = 4;
	R = MakeHoge(N);
	std::cout << ((R == 0) ? -1 : R) << std::endl;
	N = 2343;
	R = MakeHoge(N);
	std::cout << ((R == 0) ? -1 : R) << std::endl;
#else
	std::cin >> N;
	R = MakeHoge(N);
	std::cout << ((R == 0) ? -1 : R) << std::endl;
#endif

	return 0;
}