#include <bits/stdc++.h>
using namespace std;
 
#define fi first
#define se second
#define pb push_back
using vi = vector <int>;
using ll = long long;
using pii = pair <int, int>;
const ll mod = 998244353;
//~ const ll mod = 1e9 + 7;
ll qpow(ll a, ll b, ll m = mod) { ll r = 1, t = a;
	for(; b; b /= 2) { if(b & 1) r = r * t % m; t = t * t % m; } return r; }

const int N = 1e4 + 11;
const int inf = 1e9;

int dis[N];

int main() {
	ios :: sync_with_stdio(false);
	
	int n; cin >> n;
	
	fill(dis, dis + n + 1, inf);
	queue <int> q; q.push(1);
	dis[1] = 0;
	
	while(!q.empty()) {
		int x = q.front(); q.pop();
		int b = __builtin_popcount(x);
		for(int i : {x - b, x + b})
			if(i >= 1 && i <= n) {
				if(dis[i] == inf) {
					dis[i] = dis[x] + 1;
					q.push(i);
				}
			}
	}
	
	cout << (dis[n] == inf ? -1 : dis[n] + 1) << '\n';
}