#include <iostream>
#include <cstdio>
#include <queue>
using namespace std;

const int INF = 1e+9;

int main() {
	cin.tie(0);
    ios::sync_with_stdio(false);
 
 	int n;
 	cin >> n;
 	int ans = -1;
 	queue<int> que;
 	que.push(1);
 	bool visited[10001] = {0};
 	int d[10001] = {0};
 	d[1] = 1;
 	while(!que.empty()){
 		int p = que.front(); que.pop();
 		 
 		if(n == p){
 			ans = d[p];
 			break;
 		}
 		if(visited[p]){
 			continue;
 		}
 		visited[p] = true;
 		int next = __builtin_popcount(p);
 		if(next + p <= n){
 			d[next + p] = d[p] + 1;
 			que.push(next + p);
 		}
 	}
 	cout << ans << endl;
	return 0;
}