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

#define INF 10000000

void next(int k, vector<int> &dp, int count, int n) {
	int step = 0;

	if (dp[k] < INF)
		return;

	dp[k] = count;
	count++;

	for (int i = k; i > 0; i = i >> 1) {
		if(i & 1) step++;
	}

	if (k + step <= n)
		next(k + step, dp, count, n);
	if (k - step >= 1)
		next(k - step, dp, count, n);
}


int main() {

	int n;
	cin >> n;

	vector<int> dp(n+1, INF);

	int count = 1;

	next(1, dp, 1, n);

	if (dp.at(n) < INF)
		cout << dp.at(n) << endl;
	else
		cout << -1 << endl;
	

	return 0;
}