// No.642 Two Operations No.1
// https://yukicoder.me/problems/no/642a
//
#include <iostream>
using namespace std;

int solve(int N);


int main() {
    std::cin.tie(nullptr);
    std::ios::sync_with_stdio(false);

    int N;
    cin >> N;
    int ans = solve(N);
    cout << ans << endl;
}


int solve(int N) {
    int ans = 0;

    while (N != 1) {
        if (N % 2 == 0)
            N /= 2;
        else
            ++N;
        ++ans;
    }
    return ans;
}