/*
 * main.cpp
 *
 *  Created on: Jul 13, 2016
 *      Author: lau
 */

#include <fstream>
#include <iostream>

using namespace std;

int main() {
	ifstream f("fractii.in");
	int n = 0;
	f >> n;
	f.close();
	n++;
	int k = 0;
	float* a = new float[(unsigned int) n];
	for (int i = 1; i < n; i++)
		for (int j = 1; j < n; j++)
		{
			float nr = (float) i /  (float) j;
			bool b = true;
			for (int l = 0; l < k; l++)
				if (a[l] == nr)
				{
					b = false;
					break;
				}
			if (b)
			{
				a[k] = nr;
				k++;
			}
		}
	ofstream f2("fractii.out");
	f2 << k << endl;
	f2.close();
	delete[] a;
	return 0;
}