#define  _CRT_SECURE_NO_WARNINGS
#include <stdio.h>
#include <algorithm>
#include <utility>
#include <functional>
#include <cstring>
#include <queue>
#include <stack>
#include <math.h>
#include <iterator>
#include <vector>
#include <string>
#include <set>
#include <math.h>
#include <iostream> 
#include<map>
#include <iomanip>
#include <stdlib.h>
#include <list>
#include <typeinfo>
#include <list>
#include <set>
using namespace std;
#define MAX_MOD 1000000007
#define REP(i,n) for(long long i = 0;i < n;++i)
#define LONG_INF 100000000000000
int counter[20000] = {};
int arrive[20000] = {};
int main() {
	int n;
	cin >> n;
	for (int i = 1;i <= 10000;++i) {
		int tmp = i;
		int cnt = 0;
		while (tmp != 0) {
			cnt += tmp % 2;
			tmp /= 2;
		}
		counter[i] = cnt;
	}
	queue<int> gone;
	gone.push(1);
	while (gone.empty() == false) {
		int now = gone.front();
		gone.pop();
		if (now - counter[now] > 1) {
			if (arrive[now - counter[now]] == 0 || arrive[now - counter[now]] > arrive[now] + 1) {
				gone.push(now - counter[now]);
				arrive[now - counter[now]] = arrive[now] + 1;
			}
		}
		if (now + counter[now] <= n) {
			if (arrive[now + counter[now]] == 0 || arrive[now + counter[now]] > arrive[now] + 1) {
				gone.push(now + counter[now]);
				arrive[now + counter[now]] = arrive[now] + 1;
			}
		}
	}
	if (arrive[n] == 0&&n != 1) {
		cout << -1 << endl;
		return 0;
	}
	else cout << arrive[n]+1;
	return 0;
}