#include <iostream>
#include <fstream>
#define MN 1000005
using namespace std;
ifstream fin("fractii.in");ofstream fout("fractii.out");float v[MN];
int main(){int k=1,n,c,d;fin>>n;int m=n*n;float i,j;v[n*n]=(0);
for(i=1;i<=n;i++)
for(j=1;j<=n;j++)
{v[k]=float(i/j);k++;}
for(k=1;k<=m;k++)
{for(i=k+1;i<m;i++)
{c=i;
if(v[c]==v[k])
{for(j=i;j<=m;j++)
{d=j;
v[d]=v[d+1];}
m--;i--;}}}
fout<<m-1;
return 0;}