#include <fstream>
using namespace std;
int prim(int a, int b)
{
    int auxa, auxb;
    auxa=a; auxb=b;
    while(auxa!=auxb)
    {
        if(auxa>auxb)
            auxa=auxa-auxb;
        else
            auxb=auxb-auxa;
    }
    return auxa;
}
int main()
{
    int n,i,j,contor=0;
    ifstream cin("fractii.in");
    ofstream cout("fractii.out");
    cin>>n;
    for(i=1; i<=n; i++)
    {
        for(j=1; j<=n; j++)
        {
            if(prim(i,j)==1)
                contor++;
        }
    }
    cout<<contor;
}