#include <stdio.h>
#include <stdlib.h>
FILE *f,*g;
int cmmdc(int a , int b)
{
    if(a==0||b==0)
        return a+b;
    if(a>b)
        return cmmdc(a-b,b);
    else
        return cmmdc(a,b-a);
}
int main()
{
    int i,j,n,nr=0;
    f=fopen("fractii.in","r+");
    g=fopen("fractii.out","w");
    fscanf(f,"%d",&n);
    for(i=1;i<=n;i++)
        for(j=1;j<=n;j++)
        {
            if(cmmdc(i,j)==1)
                nr++;
        }
    fprintf(g,"%d",nr);
    return 0;
}