#include <iostream>
using namespace std;

int main(){
	int N;
	cin>>N;
	int cokkie=1,ans=0;
	while(cokkie!=N){
		if (cokkie*2<N) {
			cokkie*=2;
		}
		else{
			cokkie=N;
		}
		ans++;
	}
	cout<<ans<<endl;
	return 0;
}