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#include<fstream>
using namespace std;
int main()
{
ifstream f("fractii.in");
ofstream g("fractii.out");
int n,i,j,k,nr=0;
f>>n;
for(i=1; i<=n; i++)
for(j=1; j<=n; j++)
if(i>j)
for(k=2; k<=j; k++)
{
if(i%k!=0&&j%k!=0||
i%k==0&&j%k!=0||
i%k!=0&&j%k==0)
nr++;
}
else
for(k=2; k<=i; k++)
{
if(i%k!=0&&j%k!=0||
i%k==0&&j%k!=0||
i%k!=0&&j%k==0)
nr++;
}
return 0;
}