#include <iostream>
#include <stdio.h>
 
using namespace std;

FILE * f;
FILE * g;
int P,Q,N,i,j,fr,ok;
int main()
{
    f=fopen("fractii.in.txt","rt");
    g=fopen("fractii.out.txt","wt");

    fscanf(f,"%d",&N);
    Q=N;
    P=Q;
    fr=0;
    for(i=1;i<=P;i++)
        for(j=1;j<=Q;j++)
        {  ok=0;

            if((i==1)||(j==1))
           {fr++;
            ok=1;}
           if((i%j!=0) &&(j%i!=0) &&(ok==0))
                {fr++;
                ok=1;}

        }
        fprintf(g,"%d",fr);
        
        fclose(f);
        fclose(g);
        return 0;
}