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#include <fstream>
using namespace std;
int cmmdc(int a, int b)
{
int r=a%b;
while(r!=0)
{
a=b;
b=r;
r=a%b;
}
return b;
}
ifstream fin("fractii.in");
ofstream fout("fractii.out");
int main()
{
int p,q,n,nr=0;
fin>>n;
for(p=1; p<=n; p++)
for(q=1; q<=n; q++)
if(cmmdc(p, q)==1)
nr++;
fout<<nr;
return 0;
}