#include <iostream>

#include <vector>
#include <map>
#include <algorithm>
#include <fstream>
#include<cstdio>
#include<iomanip>
#include<stack>
#include<queue>
#include<string>
#include <cstdlib>
#include <typeinfo>

#define REP(i, n) for(int i=0;i<n;i++)
#define REP2(i, s, n) for(int i=s;i<n;i++)
#define REP_1(i, n) for(int i=1;i<n+1;i++)
#define bitSearch(bit, n) for(int bit = 0; bit < (1 << n); bit++)
using namespace std;

template<class T>
void print(const T &value) {
    std::cout << value << std::endl;
}

void yesno(bool a) { if (a)cout << "yes" << endl; else cout << "no" << endl; }

void YesNo(bool a) { if (a)cout << "Yes" << endl; else cout << "No" << endl; }

void YESNO(bool a) { if (a)cout << "YES" << endl; else cout << "NO" << endl; }

typedef long long ll;
typedef unsigned long ul;
typedef long double ld;

template<class T>
inline bool chmin(T &a, T b) {
    if (a > b) {
        a = b;
        return true;
    }
    return false;
}

template<class T>
inline bool chmax(T &a, T b) {
    if (a < b) {
        a = b;
        return true;
    }
    return false;
}

ll INF = 10000000;
ll mod = 1000000007;//10^9+7
int dx[8] = {-1, 0, 0, 1, -1, -1, 1, 1};
int dy[8] = {0, -1, 1, 0, -1, 1, -1, 1};
using Graph = vector<vector<int>>;//隣接リスト:G[i]にはiと隣接する頂点が入るよ。
using P = pair<int, int>;//BFSで利用。queueに入れる。
using PP = pair<int, P>; //dijkstraで利用,priority_queueに入れる。
using p_queue = priority_queue<int, vector<int>, greater<int>()>;
//struct edge{int to, cost};

void factorization(int N, map<int, int> &Prime) {
    int a = 2;
    while (a * a <= N) {
        if (N % a == 0) {
            N /= a;
            if (Prime.count(a)) { Prime[a] += 1; }
            else { Prime[a] = 1; }
        } else {
            a++;
        }
    }
    if (N != 1) {
        Prime[N] = 1;
    }
}


//番号ズレ注意！！
int main() {
    int N;
    cin >> N;
    int dp[N + 1];
    fill(dp, dp + N + 1, INF);
    dp[1] = 1;
    bool unchange = false;
    while (!unchange) {
        unchange = true;
        REP_1(i, N) {
            int num = 0;
            int tmp = i;
            while (tmp > 0) {
                num += tmp % 2;
                tmp /= 2;
            }
            if (i + num <= N) {
                if (dp[i + num] > dp[i] + 1) {
                    dp[i + num] = dp[i] + 1;
                    unchange = false;
                }
            }
            if (i - num >= 1) {
                if (dp[i - num] > dp[i] + 1) {
                    dp[i - num] = dp[i] + 1;
                    unchange = false;
                }
            }
        }
    }
    if (dp[N] == INF) { print(-1); }
    else { print(dp[N]); }
}