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

#define FOR(i,a,b) for(int i=(a);i<(int)(b);i++)
#define rep(i,n) FOR(i,0,n)
#define ZERO(a) memset(a,0,sizeof(a))

const int INF = 114514810;
int cost[10010][10010];
bool used[10010];
int d[10010];
int n;

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

void dijkstra(int s) {
    ZERO(used);
    fill(d,d+n+1,INF);
    d[s] = 0;
    while(1) {
        int v = -1;
        FOR(u,1,n+1) {
            if(!used[u] and (v == -1 or d[u] < d[v])) v = u;
        }
        if(v == -1) break;
        used[v] = 1;
        FOR(u,1,n+1) d[u] = min(d[u], d[v] + cost[v][u]);
    }
}

int main() {
    cin>>n;
    rep(i,n+1) rep(j,n+1) cost[i][j] = INF;
    vector<int> a(n+1);
    rep(i,n+1) a[i] = calc(i);

    FOR(i,1,n+1) {
        if(i + a[i] <= n) {
            cost[i][i+a[i]] = 1;
        } else if(i - a[i] >= 1) {
            cost[i][i-a[i]] = 1;
        }
    }

    dijkstra(1);
    cout << (d[n]>=INF ? -1 : d[n] + 1) << "\n";

    return 0;
}