#include <iostream>
#include <string>
#include <vector>

using namespace std;

static int count_bits(int i)
{
    auto b = 0;
    while (i > 0) {
        if (i & 0x01) ++b;
        i >>= 1;
    }

    return b;
}

static int move(const vector<int>& bits, int n, int pos, int count)
{
    if (n == pos) return count;
    if (count > 1 && pos <= 1) return -1;

    if (pos + bits[pos] > n) return move(bits, n, pos - bits[pos], count + 1);

    return move(bits, n, pos + bits[pos], count + 1);
}

static void run()
{
    int n;
    cin >> n;

    vector<int> bits;
    bits.resize(n + 1);

    for (auto i = 1; i <= n; ++i) {
        bits[i] = count_bits(i);
    }

    const auto count = move(bits, n, 1, 1);
    cout << count << endl;
}

int main(int argc, char **argv)
{
    run();
    return 0;
}