#include<fstream>

using namespace std;

int f(int nr1, int nr2)
{
while(nr1!=nr2)
	if(nr1>nr2)
		nr1=nr1-nr2;
	else
		nr2=nr2-nr1;
return nr1;
}
int main()
{
int n,i,j,k=0;
ifstream fin("fractii.in");
ofstream fout("fractii.out");
fin>>n;
fin.close();
for(i=1;i<=n;i++)
	for(j=1;j<=n;j++)
		if(f(i,j)==1)
			k++;
fout<<k;
fout.close();
return 0;
}