#include<iostream>
#include<cstring>
#include<queue>
using namespace std;
typedef long long ll;
const int N = 1e4 + 10;
bool v[N];
int m[N];
int n;

int fun(int x)
{
    int ans = 0;
    while(x)
    {
        if(x & 1) ans ++ ;
        x >>= 1;
    }
    return ans;
}

void bfs()
{
    queue<int> q;
    q.push(1);
    memset(m, 0x3f, sizeof m);
    m[1] = 1;

    while(q.size())
    {
        int t = q.front();
        q.pop();
        if(v[t]) continue;
        v[t] = true;
        int d = fun(t);
        if(t - d >= 1 && t - d <= n && !v[t - d])
        {
            m[t - d] = min(m[t] + 1, m[t - d]);
            q.push(t - d);
        }

        if(t + d >= 1 && t + d <= n && !v[t + d])
        {
            m[t + d] = min(m[t] + 1, m[t + d]);
            q.push(t + d);
        }
    }

    if(v[n]) cout << m[n];
    else cout << -1;
}

int main()
{
    cin.tie(0), cout.tie(0), ios::sync_with_stdio(false);
    cin >> n;
    bfs();

    return 0;
}