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

#ifdef _RUTHEN
#include <debug.hpp>
#else
#define show(...) true
#endif

using ll = long long;
#define rep(i, n) for (int i = 0; i < (n); i++)
template <class T> using V = vector<T>;

int main() {
    ios::sync_with_stdio(false);
    cin.tie(0);
    long long N;
    cin >> N;
    int ans = 0;
    while (N != 1) {
        if (N & 1) {
            N++;
        } else {
            while (N % 2 == 0) N /= 2;
        }
        ans++;
    }
    cout << ans << '\n';
    return 0;
}