#include <bits/stdc++.h>
using namespace std;
using Graph = vector<vector<int>>;

int main() {
	int n;
	cin >> n;
	Graph g(n + 1);
	for (int i = 1; i < n; i++){
		int c = __builtin_popcount(i);
		if (i + c <= n){
			g[i].push_back(i + c);
		}
		if (0 <= i - c){
			g[i].push_back(i - c);
		}
	}
	vector<int> d(n + 1, -1);
	d[1] = 1;
	queue<int> q;
	q.push(1);
	while (!q.empty()){
		int v = q.front();
		q.pop();
		for (int i : g[v]){
			if (d[i] == -1){
				d[i] = d[v] + 1;
				q.push(i);
			}
		}
	}
	cout << d[n] << endl;
}