// Fractii.cpp : Defines the entry point for the console application.
//

#include<fstream.h>
//using namespace std;


//int _tmain(int argc, _TCHAR* argv[])
int main()
{

long  slasktratt,i,j,k,a,z;
ifstream f("fractii.in");
ofstream g("fractii.out");
f>>a;
slasktratt=0;
for (i=1;i<=a;i++)
{
for (j=1;j<=a;j++)
{
z=1;

for (k=2;k<=i;k++)
{
if ((i%k==0)&&(j%k==0)) {z=0;break;}
//cout<<i<<" "<<j<<" "<<z<<endl;
}


if (z) slasktratt++;
}
}
g<<slasktratt;
f.close();
g.close();
	return 0;
}