#include <bits/stdc++.h>
using namespace std;

int bin(int n)
{
    int r = 0;
    while(n){
        r += n % 2;
        n /= 2;
    }
    return r;
}

int main()
{
    int n;
    cin >> n;

    vector<int> v(n+1,1);
    queue<int> que;
    que.push(1);
    while(que.size()){
        int x = que.front(),y = bin(x);
        que.pop();
        if(0 < x + y && x + y <= n && v[x+y] == 1){
            que.push(x+y);
            v[x+y] = v[x] + 1;
        }
        if(x + y == n){
            cout << v[x+y] << endl;
            return 0;
        }
        if(0 < x - y && x - y <= n && v[x-y] == 1){
            que.push(x-y);
            v[x-y] = v[x] + 1;
        }
        if(x - y == n){
            cout << v[x-y] << endl;
            return 0;
        }
    }
    cout << (n == 1 ? "1" : "-1") << endl;
    return 0;
}