//============================================================================
// Name        : yuki3.cpp
// Author      :
// Version     :
// Copyright   : Your copyright notice
// Description : Hello World in C++, Ansi-style
//============================================================================

#include <iostream>
#include <vector>
#include <climits>
using namespace std;

void re(int p, vector<int> &v, vector<int> &cost) {
	if(p + v[p] < (int)v.size() && cost[p + v[p]] > cost[p] + 1) {
		cost[p + v[p]] = cost[p] + 1;
		re(p + v[p], v, cost);
	}
	if(p - v[p] >= 0 && cost[p - v[p]] > cost[p] + 1) {
		cost[p - v[p]] = cost[p] + 1;
		re(p - v[p], v, cost);
	}
}

int main() {
	int n;
	cin >> n;
	vector<int> v; //前後への移動距離
	for(int i=0; i<n; ++i) {
		int move = 0;
		for(int t = i+1; t>0; t>>=1) {
			if(t & 1) {
				move++;
			}
		}
		//cout << move << endl;
		v.push_back(move);
	}
	vector<int> cost(n, INT_MAX);
	cost[0] = 1;
	re(0, v, cost);
	if(cost.back() == INT_MAX) {
		cout << "-1" << endl;
	}else {
		cout << cost.back() << endl;
	}
	return 0;
}