static void Main(string[] args)
{
int cases = int.Parse(Console.ReadLine());
string[] people = new string[cases];
int j = cases * cases;
int x = 0;
for (int i = 0; i < (cases * cases) / 2; i++)
{
people[x] += (i + 1).ToString() + " " + j.ToString() + " ";
j--;
x++;
if (x == people.Length)
x = 0;
}
for (int i = 0; i < people.Length; i++)
Console.WriteLine(people[i]);
Console.ReadLine();
}