#include <iostream>
#include <fstream>
#include <string>
#include <cmath>
#include <vector>
#include <stdlib.h>
#include <algorithm>

using namespace std;

int main() {

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

    unsigned int a,i,k,s=0;

    fin>>a;

    for (i=1;i<=a;i++) {

        for (k=1;k<=a;k++) {

            if ((i%k>0 && k%i>0) || k==1 || i==1) {

                s++;
//cout<<i<<"/"<<k<<endl;

            }

        }

    }

    fout<<s;

    fin.close();
    fout.close();

	return 0;
}