#include <iostream>
#include <cstdio>
#include <cmath>
#include <algorithm>
#include <string>
#include <map>
#include <bitset>
#include <vector>
#include <queue>


typedef long long ll;
#define fi first
#define se second
const ll mod = 1000000007;
//              123456789

using namespace std;

///////////////////////////////////////////////
//
//
///////////////////////////////////////////////

////////////////////////////////////////////////
////////////////////////////////////////////////


queue<int> Q;

int cost[11234];
int N;

int main(){
	
	fill(cost, cost+11234, mod);
	cost[1] = 1;
	
	Q.push( 1 );
	
	cin>>N;
	
	int ans;
	int num;
	int next;
	int flag = 0;
	int j[2] = { 1, -1 };
	int i;
	
	if( N > 1 ){
		while( !Q.empty() ){
			num = Q.front();
			for( i = 0; i < 2; i++ ){
				next = num + (j[i]*bitset<32>(num).count());
				//cout<<num<<" "<<bitset<32>(num).count()<<endl;
				if( 0 < next && next <= N ){
					if( cost[next] == (int)mod ){
						cost[next] = cost[num]+1;
						Q.push( next );
						//cout<<next<<endl;
					}
					if( next == N ) flag = 1;
				}
			}
			//cout<<num<<" "<<cost[num]<<endl;
			if( flag ){
				ans = cost[N];
				break;
			}
			
			Q.pop();
		}
	}
	else{
		ans = 1;
	}
	if( cost[N] == (int)mod ) ans = -1;
	
	cout<<ans<<endl;
	
	
	return 0;
}