#include <stdio.h>

bool legkisebb(int a,int b)
{
    while(a!=b)
    {
        if(a>b)
            a-=b;
        else
            b-=a;
    }
    if(a==1)
        return true;
    else
        return false;
}

int main()
{
    freopen("fractii.in","r",stdin);
    freopen("fractii.out","w",stdout);
    int n,c=0;
    scanf("%d",&n);
    for(int i=1;i<=n;++i)
        for(int j=1;j<=n;++j)
            if(legkisebb(i,j))
                c++;
    printf("%d",c);
}