#include<cstdio>
using namespace std;
int N,i,j,k,nr;
bool ok=true;
FILE *f,*g;
int main()
{
    f=fopen("fractii.in","r");
    fscanf(f,"%i",&N);
    nr=0;
    for(i=1;i<=N;i++)
        for(j=1;j<=N;j++)
        {
                ok=true;
                for(k=2;(k<=j)&&(k<=i)&&(ok);k++)
                    if((j%k==0)&&(i%k==0))
                        ok=false;
                    if(ok)
                        nr++;
        }
        g=fopen("fractii.out","w");
        fprintf(g,"%i\n",nr);
        fclose(f);
        fclose(g);
        return 0;
}