#include <fstream>
#include <iostream>

using namespace std;

int main()
{
    int n,p,q,k;
    ifstream fin("fractii.in");
    fin>>n;
    k=1;
    fin.close();
    ofstream fout("fractii.out");
    for(p=1;p<=n;p++)
        {
            for(q=1;q<=n;q++)
              if(p/q!=0 && p%q!=p)
                k++;
        }
    fout<<k;
    fout.close();
    return 0;
}