#include <iostream>
#include <fstream>
using namespace std;
ifstream fin("fractii.in");
ofstream fout("fractii.out");
int main()
{
    long n,i,s=0,d=0,f=0,g=0,e;
    fin>>n;
    fin.close();
    for (i=2;i<=n;i++)
    {
        if ((i%2==0)&&(i!=2))
            s++;
        if ((i%3==0)&&(i!=3))
            d++;
        if ((i%5==0)&&(i!=5))
            f++;
        if ((i%7==0)&&(i!=7))
            g++;
    }
    e=n*n-s*(s+1)-d*(d+1)-f*(f+1)-g*(g+1)-(n-1);
    fout<<e;
    fout.close();

}