#include <bits/stdc++.h> #define VARNAME(x) #x #define show(x) cerr << #x << " = " << x << endl using namespace std; using ll = long long; using ld = long double; template <typename T> vector<T> Vec(int n, T v) { return vector<T>(n, v); } template <class... Args> auto Vec(int n, Args... args) { auto val = Vec(args...); return vector<decltype(val)>(n, move(val)); } template <typename T> ostream& operator<<(ostream& os, const vector<T>& v) { os << "sz:" << v.size() << "\n["; for (const auto& p : v) { os << p << ","; } os << "]\n"; return os; } template <typename S, typename T> ostream& operator<<(ostream& os, const pair<S, T>& p) { os << "(" << p.first << "," << p.second << ")"; return os; } constexpr ll MOD = (ll)1e9 + 7LL; constexpr ld PI = static_cast<ld>(3.1415926535898); template <typename T> constexpr T INF = numeric_limits<T>::max() / 10; int main() { cin.tie(0); ios::sync_with_stdio(false); ll N; cin >> N; int ans = 0; for (; N > 1; ans++) { N = (N % 2 == 1) ? N + 1 : N / 2; } cout << ans << endl; return 0; }