using System;

​

public static class SpiralMatrix

{

    public enum Direction {

        Left = 0,

        Right = 1,

        UP = 2,

        Down = 3,

    }

​

​

    public static void Main()

    {

        Console.Write("Въведи число: ");

        int n = int.Parse(Console.ReadLine());

        Direction direction = Direction.Right;

        int[,] matrix = BuildMatrix(n, direction);

        // Render Matrix

        renderMatrix(n, matrix);

    }

    private static int[,] BuildMatrix(int n, Direction direction)

    {

        int row = 0;

        int col = 0;

        int maxRotations = n * n;

        int[,] matrix = new int[n, n];

        for (int i = 1; i <= maxRotations; i++) {

            if (direction == Direction.Right && (col > n - 1 || matrix[row, col] != 0)) {

                direction = Direction.Down;

                col--;

                row++;

            }

            if (direction == Direction.Down && (row > n - 1 || matrix[row, col] != 0)) {

                direction = Direction.Left;

                row--;

                col--;

            }

            if (direction == Direction.Left && (col < 0 || matrix[row, col] != 0)) {

                direction = Direction.UP;

                col++;

                row--;

            }

            if (direction == Direction.UP && row < 0 || matrix[row, col] != 0) {

                direction = Direction.Right;

                row++;

                col++;

            }

            matrix[row, col] = i;

            if (direction == Direction.Right) {

                col++;

            }

            if (direction == Direction.Down) {

                row++;

            }

            if (direction == Direction.Left) {

                col--;

            }

            if (direction == Direction.UP) {

                row--;

            }

        }

        return matrix;

    }

    private static void renderMatrix (int n, int[,] matrix) {

        for (int r = 0; r < n; r++) {

            for (int c = 0; c < n; c++) {

                Console.Write("{0,4}", matrix[r, c]);

            }

            Console.WriteLine();

        }

    }

}