using System;

namespace fillTheMatrix
{
    class MainClass
    {
        static void Main(string[] args)
        {
            int size = int.Parse(Console.ReadLine());
            string point = Console.ReadLine();
            var sum = 1;

            int[,] matrix = new int[size, size];
            // first part
            /*
            for (int col = 0; col < size; col++)
                {
                    for (int row = 0; row < size; row++)
                    {
                        matrix[row, col] = sum;
                    sum++;
                    }
                }
                */

            //second part
            /*
            for (int col = 0; col < size; col++)
            {
                int checker = col % 2;
                if (checker == 0)
                {
                    for (int row = 0; row < size; row++)
                    {
                        matrix[row, col] = sum;
                        sum++;
                    }
                }
                else
                {
                    for (int row = size - 1; row >= 0; row--)
                    {
                        matrix[row, col] = sum;
                        sum++;

                    }
                }
            }
            */
            //third part
            /*
            for (int i = size - 1; i >= 0; i--)
            {
                int row = i;
                int col = 0;

                while (true)
                {
                    matrix[row, col] = sum;
                    sum++;
                    if (row == size - 1)
                    {
                        break;
                    }
                    else
                    {
                        row++;
                        col++;
                    }
                }
            }

            for (int i = 1; i < size; i++)
            {
                int row = i;
                int col = 0;

                while (true)
                {
                    matrix[col, row] = sum;
                    sum++;
                    if (row == size - 1)
                    {
                        break;
                    }
                    else
                    {
                        row++;
                        col++;
                    }
                }
            }
            */

            string direction = "down";
            int row = 0;
            int col = 0;
            for (int i = 0; i < size * size; i++)
            {
                if (direction == "down" && matrix[row, col] == 0)
                {
                    matrix[row, col] = sum;
                    if (row == size - 1)
                    {
                        direction = "right";
                    }
                }
                if (direction == "right")
                {
                    matrix[row, col] = sum;
                    if (col == size-1)
                    {
                        direction = "up";
                    }

                }
                if (direction =="up")
                {
                    matrix[row, col] = sum;
                    if (row <= 0)
                    {
                        direction = "left";
                    }
                }
                if (direction =="left" && matrix[row,col] == 0)
                {
                    matrix[row, col] = sum;
                    if (col <= 0)
                    {
                        direction = "down";
                    }

                }

                sum++;
                switch (direction)
                {
                    case "down":
                        row++;
                        break;
                    case "right":
                        col++;
                        break;
                    case "up":
                        row--;
                        break;
                    case "left":
                        col--;
                        break;

                    default:
                        break;
                }

                Print(matrix);
            }
        }

        static void Print(int[,] matrixToPrint)
        {
            for (int row = 0; row < matrixToPrint.GetLength(0); row++)
            {
                for (int col = 0; col < matrixToPrint.GetLength(1); col++)
                {
                    Console.Write(matrixToPrint[row, col] + " ");
                }
                Console.WriteLine();
            }
        }
    }
}