#include<bits/stdc++.h>
#define REP(i,n) for(int i=0;i<(n);i++)
#define ALL(v) (v).begin(),(v).end()
#define int long long

using namespace std;
typedef pair<int,int> P;

//-----------------------------------------------------------------------

const int INF=1e18;

signed main()
{
    cin.tie(0);
    ios::sync_with_stdio(false);

    int n; cin>>n;

    queue<int> que;
    que.push(n);
    
    int ans=0;
    while(!que.empty()){
        int sz=que.size();
        REP(i,sz){
            int x=que.front(); que.pop();
            if(x==1){
                cout<<ans<<endl;
                return 0;
            }else{
                que.push(x+1);
                if(x%2==0) que.push(x/2);
            }
        }
        ans++;
    }
}