#include <bits/stdc++.h>
#define For(i, a, b) for(long long i = a; i < b; i++)
#define rep(i, n) For(i, 0, n)
#define rFor(i, a, b) for(long long i = a; i >= b; i--)
using namespace std;

using lint = long long;

template <class T>
struct Edge {
    int from, to;
    T cost;
    int idx;
    
    Edge() {}
    Edge(int to_) : to(to_) {}
    Edge(int to_, T cost_) : to(to_), cost(cost_) {}
    Edge(int from_, int to_, int idx_) : from(from_), to(to_), idx(idx_) {}
    Edge(int from_, int to_, T cost_, int idx_) : from(from_), to(to_), cost(cost_), idx(idx_) {}
};

template <class T> using Graph = vector<vector<Edge<T>>>;
using graph = Graph<long long>;
using edge = Edge<long long>;

#define add emplace_back

struct Dijkstra {
    private:
    graph g;
    int n, s;
    vector<long long> d;
    vector<edge> prev;
    vector<bool> visit;
    priority_queue<pair<long long, int>, vector<pair<long long, int>>, greater<pair<long long, int>>> pq;
    
    public:
    Dijkstra(graph g_, int s_) : g(g_), n(g.size()), s(s_), d(n, 1000000000000000000), prev(n), visit(n, false) {
        d[s] = 0LL;
        pq.emplace(d[s], s);
        while (!pq.empty()) {
            int v = pq.top().second;
            pq.pop();
            if (visit[v]) {
                continue;
            }
            visit[v] = true;
            for (auto e : g[v]) {
                int nv = e.to;
                long long nc = e.cost;
                if (d[nv] > d[v] + nc) {
                    d[nv] = d[v] + nc;
                    prev[nv] = e;
                    pq.emplace(d[nv], nv);
                }
            }
        }
    }
    
    vector<long long> dists() {
        return d;
    }
    
    long long dist(int t) {
        return d[t];
    }
    
    vector<edge> route(int t) {
        if (s == t || d[t] == 1000000000000000000) {
            return {};
        }
        vector<edge> res;
        int cur = t;
        while (cur != s) {
            res.emplace_back(prev[cur]);
            cur = prev[cur].from;
        }
        reverse(res.begin(), res.end());
        return res;
    }
};

int main() {
    int n;
    cin >> n;
    graph g(n);
    for (int i = 0; i < n; i++) {
        int d = __builtin_popcount(i + 1);
        if (i - d > 0) {
            g[i].add(i - d, 1LL);
        }
        if (i + d < n) {
            g[i].add(i + d, 1LL);
        }
    }
    lint ans = Dijkstra(g, 0).dist(n - 1);
    cout << (ans == 1000000000000000000 ? -1 : ans + 1) << endl;
}