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#include<iostream>
#include<fstream>
using namespace std;
ifstream fin("fractii.in");
ofstream fout("fractii.out");
int n,i,j,k,l,q;
double a[100],x;
int main()
{
fin>>n;
/*q=0; i=0; j=0;
while (q!=n*n) { q++; i++; j++; while (j!=n) { a[q]=(i*1.0)/(j*1.0);
j++;
q++;};
j=0;
}
while(q!=n*n) {q++;
cout<<a[q]<<" ";}*/
for(i=1;i<=n;i++) for(j=1;j<=n;j++) {q++;
a[q]=(i*1.0)/(j*1.0);
}
for(q=1;q<=n*n;q++) {
x=a[q];
l=q-1;
while( l >= 1 && a[l] > x )
{
a[l+1] = a[l];
l--;
}
a[l+1] = x;
}
for(q=1;q<=n*n;q++) if (a[q]==a[q+1]) k++;
fout<<n*n-k;
return 0;
}