#include <iostream>
#include <cstdio>
#include <cmath>
#include <vector>
#include <deque>
#include <list>
#include <string>
#include <stack>
#include <queue>
#include <set>
#include <algorithm>

#define INF 100000000

using namespace std;

int N;
int dist[10010];
bool inflag[10010];
queue<int> ready;

int main() {
	int i;

	cin >> N;

	dist[1] = 1;
	for (i = 2; i <= 10000; i++) dist[i] = INF;
	ready.push(1);

	while (!ready.empty()) {
		int now = ready.front(); ready.pop();
		int now_c = now;
		int bits = 0;
		for (i = 13; i >= 0; i--) {
			if (now_c >= pow(2, i)) {
				bits++;
				now_c -= pow(2, i);
			}
		}
		if (now - bits >= 2 && dist[now - bits] > dist[now] + 1) {
			dist[now - bits] = dist[now] + 1;
			ready.push(now - bits);
		}
		if (now + bits <= N && dist[now + bits] > dist[now] + 1) {
			dist[now + bits] = dist[now] + 1;
			ready.push(now + bits);
		}
	}

	if (dist[N] == INF) cout << "-1" << endl;
	else cout << dist[N] << endl;

	return 0;
}