#include<iostream>
#include<cassert>
using namespace std;
int F[30]={4,3,5,17,257,65537,15,51,771,196611,85,1285,327685,4369,1114129,16843009,255,3855,983055,13107,3342387,50529027,21845,5570645,84215045,286331153,65535,16711935,252645135,858993459};
int main()
{
	ios::sync_with_stdio(false);
	cin.tie(nullptr);
	int N;cin>>N;
	int ans=0;
	for(int i=0;i<30;i++)
	{
		int v=N/F[i];
		while(v)v/=2,ans++;
	}
	cout<<ans<<endl;
}