#include<iostream.h>
#include <fstream.h>
int main()
{ unsigned long j,i,k=1,n,a,b;
ifstream f("fractii.in");
f>>n;
for(i=1;i<=n;i++)
for(j=1;j<=n;j++)
{a=i;b=j;
if(a!=b)
{
while(a!=b)
  if(a>b)
  a=a-b;
  else
  b=b-a;
if(a==1)
 k++;}}
ofstream g("fractii.out");
g<<k;
f.close();
g.close();
return 0;
}