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

using Int  = int64_t;
using uInt = uint64_t;

template <typename T>
using min_heap = priority_queue<T, vector<T>, greater<T>>;
template <typename T>
using max_heap = priority_queue<T, vector<T>, less<T>>;

void solve( /* Copyright by Urtusea */ )
{
    int n;
    cin >> n;

    int now = 1, cnt = 1;

    while (now < n) {
        now += __popcount(now);
        cnt += 1;
    }

    if (now == n) {
        cout << cnt << '\n';
    } else {
        cout << -1 << '\n';
    }
}

int main(int argc, char *argv[], char *envp[])
{
    cin.tie(nullptr)->sync_with_stdio(false);

    // for (int i = 1, n = (cin >> n, n); i <= n; i++)
        solve();

    return 0;
}