#include<iostream>
using namespace std;
int n;
int main()
{ if(n==0||n==1) cout<<1<<endl;
else if(n==2||n==3) cout<<2<<endl;
else if(n>=4&&n<8) cout<<3<<endl;
else if(n>=8&&n<16) cout<<4<<endl;
else cout<<5<<endl;
return 0;
}