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

int bit(int num){
    int s=0;
    while(num != 0){
        if(num%2 == 1){
        s++;
        }
        num /= 2;

    }
    return s;

}
int main(){

    int N;
    cin >> N;
    queue<int> q;
    q.push(1);
    vector<int> his(N+1);
    his.at(1) =1;


    for(int i = 0; i < N; i++){
                if(q.empty()){
            cout << -1 << endl;
            break;
        }
        if(N == q.front()){
            cout << his.at(q.front()) << endl;
            break;
        }

        if(q.front()+bit(q.front()) <= N){
            if(his.at(q.front()+bit(q.front())) == 0){
                q.push(q.front()+bit(q.front()));
                his.at(q.front()+bit(q.front())) = his.at(q.front()) +1;
            }
        }
        if(q.front()-bit(q.front()) > 1 ){
            if(his.at(q.front()-bit(q.front())) == 0){
                q.push(q.front()-bit(q.front()));
                his.at(q.front()-bit(q.front())) = his.at(q.front()) +1;
            }
        }


        q.pop();
    }
}