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#include <iostream>
#include <fstream>
using namespace std;
ifstream fin("fractii.in");
ofstream fout("fractii.out");
bool verif(int a, int b)
{
for(int i = 2; i <= min(a, b); i++)
{
if(a % i == 0 && b % i == 0)
return false;
}
return true;
}
int main()
{
int m, cnt = 0;
fin >> m;
for(int i = 1; i <= m; i++)
{
for(int j = 1; j <= m; j++)
{
if(verif(i, j) == 1)
cnt++;
}
}
fout << cnt;
return 0;
}