// No.3 ビットすごろく
#include <iostream>
#include <vector>
#include <bitset>
#include <queue>
using namespace std;
const int INF = 1 << 30;

int main() {
    int N;
    cin >> N;
    vector<int> dp(N, INF);
    dp[0] = 1;
    priority_queue<pair<int, int>,
                    vector<pair<int, int>>,
                    greater<pair<int, int>>> que;
    que.push({1, 0});
    while (!que.empty()) {
        auto [d, x] = que.top();
        que.pop();
        if (d > dp[x]) continue;
        int move = bitset<32>(x + 1).count();
        if (x + move < N) {
            if (dp[x + move] > dp[x] + 1) {
                dp[x + move] = dp[x] + 1;
                que.push({dp[x + move], x + move});
            }
        }
        if (x - move >= 0) {
            if (dp[x - move] > dp[x] + 1) {
                dp[x - move] = dp[x] + 1;
                que.push({dp[x - move], x - move});
            }
        }
    }
    if (dp[N - 1] == INF) cout << -1 << endl;
    else cout << dp[N - 1] << endl;
}