#include <stdio.h>
#include <stdlib.h>

int main()
{
     int a,b;
    FILE *f;
    f=fopen("fractii.in","r");
    FILE *g;
    g=fopen("fractii.out","w");
    long i,j,n;
    long long nr=0;
    fscanf(f,"%ld",&n);
    for(i=1;i<=n;i++)
        for(j=1;j<=n;j++)
            if((i%j!=0 && j%i!=0) || i==1 || j==1 )
                nr++;
    fprintf(g,"%lld",nr);

}