#include <bits/stdc++.h>
using namespace std;

int cntbit(int x)
{
	int ret = 0;
	while(x > 0){
		if(x % 2 == 1) ret++;
		x /= 2;
	}
	return ret;
}


int main(){
	ios::sync_with_stdio(false);
	cin.tie(0);  

	int n; cin >> n;
	vector<int> cnt(n + 1);
	fill(cnt.begin(), cnt.end(), 1e9);                       
	queue<int> q;
	q.push(1);
	cnt[1] = 1;
	while(!q.empty()){
		int now = q.front(); q.pop();
		int dist = cntbit(now);
		if(now + dist >= 1 && now + dist <= n && cnt[now + dist] == 1e9) {
			q.push(now + dist);
			cnt[now + dist] = cnt[now] + 1;
		}
		if(now - dist >= 1 && now - dist <= n && cnt[now - dist] == 1e9) {
			q.push(now - dist);
			cnt[now - dist] = cnt[now] + 1;
		}
	}
	if(cnt[n] != 1e9) cout << cnt[n] << endl;
	else cout << -1 << endl;
	return 0;	
}