#include<stdio.h>

   int main()
{
     long n, i, a, d=0, b, c;

    freopen("fractii.in", "r", stdin);
    freopen("fractii.out", "w", stdout);
scanf("%ld", &n);

 for(a=1;a<=n;a++)
 {  for(i=1;i<=n;i++)
   { b=a;
     c=i;
      while(b!=c)
       {
        if(b>c)
         b=b-c;
        if(c>b)
         c=c-b;
       }
          if(c==1)
         d++;

   } }


printf("%ld", d);

return 0;

}