#include <fstream>

using namespace std;

int main()
{
    ifstream fin("IAfracii.in");
    
   int n, i, j;
   int m = 0;
   
   fin >> n ;
         
   fin.close();
   
   ofstream fout("IAfractii.out");
   
   for ( i = 0 ; i <= n ; i++ )
      for ( j = 1 ; j < n ; j++ )
      if ( i & j != 0 )
            m++;
            
      fout << m;
      fout.close();
      
      return 0;
}