static object Solve()
{
var n = int.Parse(Console.ReadLine());
var ps = Array.ConvertAll(new bool[n], _ => IntV.Parse(Console.ReadLine()));
var r = 0;
for (int i = 0; i < n; i++)
{
for (int j = i + 1; j < n; j++)
{
for (int k = j + 1; k < n; k++)
{
var v1 = ps[i] - ps[j];
var v2 = ps[i] - ps[k];
if (!IntV.IsParallel(v1, v2))
{
r++;
}
}
}
}
return(r);
}
