using System;

class FillTheMatrix
{
    static void Main()
    {
        int n = int.Parse(Console.ReadLine());

        int[,] matrix = new int[n, n];
        int number = 1;
        for (int i = 0; i < n; i++)
        {
            for (int j = 0; j < n; j++, number++)
            {
                matrix[j,i] = number;
            }
        }

        for (int i = 0; i < n; i++)
        {
            for (int j = 0; j < n; j++)
            {
                Console.Write("{0} ", matrix[i, j]);
            }
            Console.WriteLine();
        }

        Console.WriteLine();
        Array.Clear(matrix, 0, matrix.Length);
        number = 1;

        for (int i = 0; i < n; i++)
        {
            if (i % 2 == 0)
            {
                for (int j = 0; j < n; j++, number++)
                {
                    matrix[j, i] = number;
                }
            }
            else
            {
                for (int j = n - 1; j >= 0; j--, number++)
                {
                    matrix[j, i] = number;
                }
            }
        }
        for (int i = 0; i < n; i++)
        {
            for (int j = 0; j < n; j++)
            {
                Console.Write("{0} ", matrix[i, j]);
            }
            Console.WriteLine();
        }

    }
}