#include <iostream>
#include <queue>

using namespace std;

const int INF = 1000000;

int N;
int d[10001];

int main() {
	cin >> N;
	for (int i = 0; i <= 10000; i++) {
		d[i] = INF;
	}
	queue<int> que;
	d[1] = 1;
	que.push(1);
	while (!que.empty()) {
		int n = que.front();
		que.pop();
		int bn = __builtin_popcount(n);
		if (n - bn >= 1 && d[n - bn] == INF) {
			d[n - bn] = d[n] + 1;
			que.push(n - bn);
		}
		if (n + bn <= N && d[n + bn] == INF) {
			d[n + bn] = d[n] + 1;
			que.push(n + bn);
		}
	}
	cout << (d[N] != INF ? d[N] : -1) << endl;
	return 0;
}