#include <stdio.h>
#include <bits/stdc++.h>
#include <atcoder/all>
using namespace atcoder;
using mint = modint998244353;
using namespace std;
#define rep(i,n) for (int i = 0; i < (n); ++i)
#define Inf 1000000001

int main(){
	int n;
	cin>>n;
	queue<int> Q;
	Q.push(1);
	vector<int> dis(n+1,Inf);
	dis[01] = 1;
	
	while(Q.size()>0){
		int u  =Q.front();
		Q.pop();
		int nxt = __builtin_popcount(u);
		for(int i=-1;i<=1;i+=2){
			int v = u + nxt * i;
			if(v<=0||v>n)continue;
			if(dis[v]==Inf){
				dis[v] = dis[u]+1;
				Q.push(v);
			}
		}
	}
	
	int ans = dis.back();
	if(ans==Inf)ans = -1;
	cout<<ans<<endl;
	
	return 0;
}