public void Solve()
{
int N = ri();
int[] LArray = ria();
if (N < 3)
{
Console.WriteLine(0);
Console.ReadLine();
return;
}
Array.Sort(LArray);
int[][] Lss = Combination.Enumerate(LArray, 3, withRepetition: false).ToArray();
int ans = 0;
foreach (int[] Ls in Lss)
{
if (Ls.Distinct().Count() != 3)
{
continue;
}
Array.Sort(Ls);
if (Ls[2] < Ls[0] + Ls[1])
{
ans++;
}
}
Console.WriteLine(ans);
Console.ReadLine();
}