#include<bits/stdc++.h>
using namespace std;
int main(){
	int n;
	cin >> n;
	vector<int> dist(n+1);
	for(int i=1;i<=n;i++){
		dist[i]=-1;
	}
	dist[1]=1;
	queue<int> q;
	q.push(1);
	while(q.size()){
		int qf=q.front();
		q.pop();
		int cb=0;
		for(int i=qf;i!=0;i=i>>1){
			if(i&1==1){
				cb++;
			}
		}
		int dx[]={1,-1};
		for(int i=0;i<2;i++){
			int x=qf+cb*dx[i];
			if(x>0&&x<=n&&dist[x]==-1){
				dist[x]=dist[qf]+1;
				q.push(x);
			}
		}
	}
	if(dist[n]==-1){
		cout << -1<<endl;
	}else{
		cout << dist[n]<<endl;
	}
	return 0;
	




}