using System;

class Program
{
    static void Main(string[] args)
    {
        while (true)
        {
            Console.Write("Enter number of rows/columns: ");
            int input;
            bool isNumber = int.TryParse(Console.ReadLine(), out input);

            if (!isNumber)
            {
                return;
            }                int[,] array = new int[input, input];

            int iterator = 0;
            int row = 0;
            int col = 0;
            int step = 1;
            for (int num = 1; num <= input * input; num++)
            {
                array[row, col] = num;

                switch (step)
                {
                    case 1:
                        if (col == (input - iterator - 1))
                        {
                            row++;
                            step++;
                        }
                        else
                        {
                            col++;
                        }
                        break;

                    case 2:
                        if (row == (input - iterator - 1))
                        {
                            col--;
                            step++;
                        }
                        else
                        {
                            row++;
                        }

                        break;

                    case 3:
                        if (col == (0 + iterator))
                        {
                            row--;
                            step++;
                        }
                        else
                        {
                            col--;
                        }
                        break;

                    case 4:
                        if (row == (1 + iterator))
                        {
                            col++;
                            step = 1;
                            iterator++;
                        }
                        else
                        {
                            row--;
                        }
                        break;
                }
            }
            ShowGrid(array);
        }
    }

    public static void ShowGrid(int[,] array)
    {
        int rowLength = array.GetLength(0);
        int colLength = array.GetLength(1);

        Console.WriteLine();
        for (int i = 0; i < rowLength; i++)
        {
            for (int j = 0; j < colLength; j++)
            {
                Console.Write(string.Format("{0}\t", array[i, j]));
            }
            Console.Write(Environment.NewLine + Environment.NewLine);
        }
        Console.WriteLine();
    }
}