#define _USE_MATH_DEFINES
#include <algorithm>
#include <cstdio>
#include <functional>
#include <iostream>
#include <cfloat>
#include <climits>
#include <cstring>
#include <cmath>
#include <map>
#include <queue>
#include <set>
#include <sstream>
#include <stack>
#include <string>
#include <time.h>
#include <vector>
using namespace std;

typedef long long ll;
typedef unsigned long long ull;
typedef pair<int, int> i_i;
typedef pair<ll, int> ll_i;
typedef pair<double, int> d_i;
typedef pair<ll, ll> ll_ll;
typedef pair<double, double> d_d;
struct edge { int u, v; ll w; };

ll MOD = 1000000007;
ll _MOD = 1000000009;
double EPS = 1e-10;

vector<edge> G[10001];
ll d[10001];

void dijkstra_deque(int n, vector<edge> G[], int s, ll d[]) {
	vector<bool> vis(n, false);
	fill(d, d + n, LLONG_MAX); d[s] = 0;
	deque<ll> deq; deq.push_back(s);
	while (!deq.empty()) {
		int u = deq.front(); deq.pop_front();
		if (vis[u]) continue;
		vis[u] = true;
		for (int i = 0; i < G[u].size(); i++) {
			edge e = G[u][i];
			if (d[e.v] > d[u] + e.w) {
				d[e.v] = d[u] + e.w;
				if (e.w == 0) deq.push_front(e.v);
				else deq.push_back(e.v);
			}
		}
	}
}

void add_edge(int u, int v) {
	edge e = {u, v, 1};
	G[u].push_back(e);
}

int main() {
	int N; cin >> N;
	for (int i = 1; i <= N; i++) {
		int x = __builtin_popcount(i);
		if (i - x >= 0) add_edge(i, i - x);
		if (i + x <= N) add_edge(i, i + x);
	}
	dijkstra_deque(N + 1, G, 1, d);
	cout << (d[N] < LLONG_MAX ? d[N] + 1 : -1) << endl;
}