#include <iostream>
using namespace std;
int n,nq,p;
int main()
{
	cin>>n;
	nq=0;p=1;
	if(n==0)
	{
		cout<<1<<'\n';
		return 0;
	}
	while(n!=0)
	{
		nq++;
		n=n/2;
	}
	cout<<nq;
	return 0;
}