#include <math.h>
#include <fstream>
#include <iostream>

using namespace std;
ifstream fin ("fractii.in");
ofstream fout ("fractii.out");

int n;

int verifica(int i, int j)
{
    if ((i==1)||(j==1)) return true;
    if(i==j) return false;
    int V = i<j?j:i;
    int v = i>=j?j:i;
    for(int k=2; k<=V/2; k++)
        if((v%k==0)&&(V%k==0)) return false;
    return true;
}

int main()
{
    fin >> n;
    int count=0;

    for(int i=1; i<=n; i++) // i = numitor
        for(int j=1; j<=n; j++)
            if (verifica(i,j))
            {
                count++;
                //cout << i << "," << j << endl;
            }

    fout << count;
    return 0;
}