#include <iostream>
#include <algorithm>
#include <vector>
#include <map>
using namespace std;

int main(){
    int N;
    cin >> N;
    int ans = 0;
    while(N != 1){
        if(N % 2){
            N++;
        }else{
            N /= 2;
        }
        ans++;
    }
    cout << ans << endl;
}