#include <bits/stdc++.h>

using namespace std;

typedef pair<int,int> P;
typedef pair<int,pair<int,int>> PP;
typedef long long ll;

const double EPS = 1e-8;
const int INF = 1e9;
const int MOD = 1e9+7;

int dy[] = {0,1,0,-1};
int dx[] = {1,0,-1,0};

int N;
vector<bool> used;
int dfs(int n){
	if(n == N)return 0;
	if(n > N || n < 1 || used[n])return INF;

	used[n] = true;
	int mv = __builtin_popcount(n);
	return min(dfs(n-mv),dfs(n+mv)) + 1;

}

int main(void) {
	cin >> N;
	used.resize(N+1);
	int ret = dfs(1);
	if(ret >= INF)cout << -1 << endl;
	else cout << ret+1 << endl;

	return 0;
}