#include <iostream>
using namespace std;

#define MAX 10000000

int q[MAX];
int head = 0, tail = 0;

void enq(int p) {
	q[tail] = p;
	++tail;
	if (tail >= MAX) {
		tail = 0;
	}
}

bool deq(int* p) {
	if (head == tail) {
		return false;
	}
	else {
		*p = q[head];
		++head;
		if (head >= MAX) {
			head = 0;
		}
		return true;
	}
}

int BinaryCount(int a) {
	int cnt = 0;
	while (a>0) {
		cnt++;
		a &= a - 1;
	}
	return cnt;
}

int main(void) {
	int n;
	cin >> n;

	int* count = new int[n+1];
	for (int i = 1; i <= n; ++i) {
		count[i] = 0;
	}

	int posi = 1, hosuu;
	count[posi] = 1;
	do {
		if (posi == n) {
			cout << count[posi] << endl;
			return 0;
		}
		hosuu = BinaryCount(posi);
		if (posi - hosuu > 0 && !count[posi - hosuu]) {
			count[posi - hosuu] = count[posi] + 1;
			enq(posi - hosuu);
		}
		if (posi + hosuu <= n && !count[posi + hosuu]) {
			count[posi + hosuu] = count[posi] + 1;
			enq(posi + hosuu);
		}
	} while (deq(&posi));

	cout << "-1" << endl;

	return 0;
}