//#include <bits/stdc++.h>
#include <iostream> // cout, endl, cin
#include <string> // string, to_string, stoi
#include <vector> // vector
#include <algorithm> // min, max, swap, sort, reverse, lower_bound, upper_bound
#include <utility> // pair, make_pair
#include <tuple> // tuple, make_tuple
#include <cstdint> // int64_t, int*_t
#include <cstdio> // printf
#include <map> // map
#include <queue> // queue, priority_queue
#include <set> // set
#include <stack> // stack
#include <deque> // deque
#include <unordered_map> // unordered_map
#include <unordered_set> // unordered_set
#include <bitset> // bitset
#include <cctype> // isupper, islower, isdigit, toupper, tolower
#include <math.h>
#include <iomanip>
 
using namespace std;

typedef long long ll;
typedef unsigned long long ull;
typedef long double ld;
typedef pair<int,int> P;
typedef vector<int> vi;
typedef vector<bool> vb;
typedef vector<vector<int>> vvi;
typedef vector<long long> vll;
typedef vector<pair<int,int>> vP;
typedef vector<string> vs;

#define ext exit(0)
#define rep(i,n) for(int (i) = 0; (i) < (n); (i)++)
#define rep2(i,x,n) for(int (i) = (x); (i) < (n); (i)++)
#define pb push_back 
#define eb emplace_back 
#define all(x) x.begin() , x.end()
#define fi first
#define se second
#define Yes() {puts("YES");ext;}
#define No()  {puts("No"); ext;}
#define ssz s.size()
#define tsz t.size()
 
const ll MOD = 1000000007;
//const ll MOD = 998244353;
const ld PI = 3.14159265358979;
const int INF = 1001001001;
const ll LINF = 1001001001001001001;
const int MX = 200005;//DP...?

int in () { int x; scanf("%d" , &x); return x; }
ll lin () { ll x; scanf("%lld" , &x); return x; }

template < typename T > void chmin (T &a , T b) { if (a > b) a = b; }
template < typename T > void chmax (T &a , T b) { if (a < b) a = b; }
template < typename T > T gcd (T a , T b) { if (a < b) swap(a , b); if (a % b == 0) return b; else return gcd (b , a % b); }
template < typename T > T lcm (T a , T b) { return (a / gcd (a , b) * b); }
template < typename T > T keta (T x) { int ret = 0; while (x) { x /= 10; ret++; } return ret; }
template < typename T > bool is_2POW (T x) { if ((x & (x - 1)) == 0) return true; else return false; }

bool is_prime (ll x) {
    if (x == 1) return false;
    if (x == 2 || x == 3 || x == 5 || x == 7) return true;
    if((x & 1) == 0) return false;
    for (ll i = 3; i * i <= x; i += 2) if(x % i == 0)return false;
    return true;
}

void is_prime2 () {
    const int sz = 10001; //使う時は外に出す
    vb table(sz , 0); //使う時は外に出す
    for (int i = 2; i < sz; i++) {
        for(int j = 2; i * j < sz; j++) {
            table[i * j] = true;
        }
    }
}

//mapの方が良い場合もある
void divisor (ll x) {
    vector<int> ret;
    for (int i = 2; i * i <= x; i++) {
        while (x % i == 0) {
            ret.push_back(i);
            x /= i;
        }
    }
    if (x > 1) ret.push_back(x);
}

ll modpow (ll x , ll p , ll m) {
    ll ret = 1;
    while (p > 0) {
        if (p & 1) ret *= x;
        x *= x;
        x %= m;
        p >>= 1;
    }
    return ret;
}

/** memo **/
//vs ans;
//int n;
//vi dp(n + 10 , 0);
//v.erase(unique(v.begin(), v.end()), v.end());


void solve() {
    return;
}

int main() {    
    //cin.tie(0);
    //ios::sync_with_stdio(false);
    int n;
    cin >> n;
    vi a(n + 1);
    rep2(i,1,n + 1) {
        a[i] = __builtin_popcount(i);
    }
    vi dp(n + 100 , INF);
    dp[0] = 0;
    dp[1] = 1;
    for (int i = 1; i <= n; i++) {
        dp[i + a[i]] = min(dp[i + a[i]] , dp[i] + 1);
        dp[i - a[i]] = min(dp[i - a[i]] , dp[i] + 1);
    }
    for (int i = 1; i <= n; i++) {
        dp[i + a[i]] = min(dp[i + a[i]] , dp[i] + 1);
        dp[i - a[i]] = min(dp[i - a[i]] , dp[i] + 1);
    }
    for (int i = 1; i <= n; i++) {
        dp[i + a[i]] = min(dp[i + a[i]] , dp[i] + 1);
        dp[i - a[i]] = min(dp[i - a[i]] , dp[i] + 1);
    }
    for (int i = 1; i <= n; i++) {
        dp[i + a[i]] = min(dp[i + a[i]] , dp[i] + 1);
        dp[i - a[i]] = min(dp[i - a[i]] , dp[i] + 1);
    }
    for (int i = 1; i <= n; i++) {
        dp[i + a[i]] = min(dp[i + a[i]] , dp[i] + 1);
        dp[i - a[i]] = min(dp[i - a[i]] , dp[i] + 1);
    }
    for (int i = 1; i <= n; i++) {
        dp[i + a[i]] = min(dp[i + a[i]] , dp[i] + 1);
        dp[i - a[i]] = min(dp[i - a[i]] , dp[i] + 1);
    }
    for (int i = 1; i <= n; i++) {
        dp[i + a[i]] = min(dp[i + a[i]] , dp[i] + 1);
        dp[i - a[i]] = min(dp[i - a[i]] , dp[i] + 1);
    }
    for (int i = 1; i <= n; i++) {
        dp[i + a[i]] = min(dp[i + a[i]] , dp[i] + 1);
        dp[i - a[i]] = min(dp[i - a[i]] , dp[i] + 1);
    }
    
    if (dp[n] == INF) {
        cout << -1 << endl;
    } else {
        cout << dp[n] << endl;
    }
    return 0;
}