/*#include<iostream.h>
#include<fstream.h>
ifstream f ("cmmdc.in");
ofstream g("cmmdc.out");
int main()
{int a,b,r;
f>>a>>b;
while(b!=0)
	{r=a%b; a=b; b=r;}
    if (a!=1)g<<a;
	else g<<0;
f.close();
g.close();
return 0;}*/
#include<iostream.h>
#include<fstream.h>
ifstream f ("fractii.in");
ofstream g("fractii.out");
int main()
{int n,k=0;
float h,p,q;
f>>n;
for (p=1;p<=n;p++){
for (q=1;q<=n;q++){
h=p/q;k++;}}
g<<k;
f.close();
g.close();
return 0;}