#include<bits/stdc++.h>
using namespace std;
int main()
{
    int n; cin>>n;

    int sum=0;
    int x= n-1;

    if(n%2==0)
    {
        while(n!=0)
        {
            n=n/2;
            sum++;
        }
    }
    else if(n%2!=0)
    {
        while(x!=0)
        {
            x=x/2;
            sum++;
        }
    }
    if(n%2==0) cout<<sum+x+1;
    else cout<<sum+n+1;
}