#pragma GCC target("avx2")
#pragma GCC optimize("O3")
#pragma GCC optimize("unroll-loops")
#include<iostream>
#include<map>
using namespace std;
using i32 = int_fast32_t;
using i64 = int_fast64_t;
#define rep(i, n) for (i32 i = 0; i < (i32)(n); i++)
#define all(a) (a).begin(),(a).end()
#define rall(a) (a).rbegin(),(a).rend()
using P = pair<i64,i64>;
map<i64,i64>mp;
i64 n;
void dfs(i64 x,i64 cnt){
    if(x != 1 && mp[x] != 0 && mp[x] < cnt){
        return;
    }else if(x == n){
        mp[x] = cnt;
        return ;
    }else if(x < 1){
        return ;
    }else if(x > 2 * n){
        return ;
    }
    mp[x] = cnt;
    dfs(2 * x,cnt + 1);
    dfs(x - 1,cnt + 1);
    return ;
}
main(){
ios::sync_with_stdio(false);
std::cin.tie(nullptr);
cin >> n;
dfs((i64)(1),(i64)(0));
cout << mp[n] << endl;
}