#include <bits/stdc++.h>
using namespace std;

typedef long long ll;
#define FOR(i,a,b) for(int i=(a);i<(int)(b);i++)
#define rep(i,n) FOR(i,0,n)
#define ALL(x) (x).begin(),(x).end()
#define pb push_back
#define mp make_pair
#define F first
#define S second

int N;
bool visited[10010];

int calc(int n) {
    int res = 0;
    while(n) {
        if(n & 1) res++;
        n >>= 1;
    }
    return res;
}

int main() {
    memset(visited,0,sizeof(visited));
    cin >> N;
    queue<pair<int,int>> Q;
    Q.push(mp(1,1));

    while(Q.size()) {
        auto tmp = Q.front();
        if(tmp.F == N) {
            cout << tmp.S << "\n";
            return 0;
        }

        visited[tmp.F] = true;
        int mv = calc(tmp.F);
        int nxt = tmp.F + mv;
        if(!visited[nxt] and 1<=nxt and nxt < N) Q.push(mp(nxt, tmp.S+1));
        nxt = tmp.F - mv;
        if(!visited[nxt] and 1<=nxt and nxt < N) Q.push(mp(nxt, tmp.S+1));
        Q.pop();
    }

    cout << -1 << "\n";

    return 0;
}