#include <iostream>
#include <string>
#include <algorithm>
#include <cctype>
#include <cmath>
#include <cstring>
#include <queue>
using namespace std;

int bitcount(int a){
    int ret = 0;
	while (a > 0){
		ret++;
		a &= a - 1;
	}
	return ret;
}

int main(){
    int N;
    cin >> N;
    int v[N+1];
    memset(v, 0, sizeof(v));
    v[1] = 1;
    queue<int> q;
    q.push(1);
    while(!q.empty()){
        int current_pos = q.front();
        if(current_pos==N){
            cout << v[current_pos] << endl;
            return 0;
        }

        int bit = bitcount(current_pos);
        int valm = current_pos - bit;
        int valp = current_pos + bit;

        if(valm>0 && valm <=N && v[valm]==0){
            v[valm] = v[current_pos]+1;
            q.push(valm);
        }

        if(valp>0 && valp <=N && v[valp]==0){
            v[valp] = v[current_pos]+1;
            q.push(valp);
        }
        q.pop();
    }
    cout << -1 << endl;
}