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


int main(){
    int n;
    vector<int> a;
    cin >> n;
    a.resize(n + 1,0);
    vector<int> b;
    int s = 1,e = 1,nextE = 1;
    b.push_back(2);
    b.push_back(1);
    a.at(1) = 1;
    
    

    while(true){
        for(int i = s; i <= e; i++){
            int c;
            c = (int)bitset<32>( b.at(i) ).count();
            int i_m = b.at(i) - c;
            int i_p = b.at(i) + c;
            int i_n = b.at(i);
            if( i_p == n){
                cout << a.at(i) + 1 << endl;
                return 0;
            }
            if( i_m > 0 and a.at( i_m ) == 0){
                a.at(  i_m ) = a.at(i_n) + 1;
                b.push_back( i_m );
                nextE++;
            }
            if( i_p < n + 1 and a.at(i_p) == 0){
                a.at(i_p) = a.at(i_n) + 1;
                b.push_back(i_p);
                nextE++;
            }
        }
        if(e == nextE){
            cout << -1 << endl;
            return 0;
        }
        s = e + 1;
        e = nextE;

        
    }

    return 0;
}