using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace _12.Spiral_Matrix
{
    class Program
    {
        static void Main(string[] args)
        {
             Console.WriteLine("Please eneter number");
            int Num = int.Parse(Console.ReadLine());
            int elements = Num * Num;
            int[,] intMatrix = new int[Num, Num];
            int firstDim = 0;
            int secDim = 0;
            int step1 = 1;
            int step2 = 1;
            int step3 = 1;
            int step4 = 1;
            int stepG = 1;
            int opNum = 0;


            while (opNum <= elements)
            {
                while (firstDim <= Num - step1)
                {
                    opNum++;
                    intMatrix[firstDim, secDim] = opNum;
                    firstDim++;
                }
                step1++;
                stepG++;
                firstDim--; //излязъл е извън масива
                secDim++;

                while (secDim <= Num - step2)
                {
                    opNum++;

                    intMatrix[firstDim, secDim] = opNum;
                    secDim++;

                }

                step2++;
                stepG++;
               secDim--; //излязъл е извън масива
               firstDim--;

                while (firstDim >= (step3-1))
                {
                    opNum++;
                    intMatrix[firstDim, secDim] = opNum;
                    firstDim--;

                }

                step3++;
                stepG++;
                firstDim++;
                secDim--;

                while (secDim >= (step4))
                {
                    opNum++;
                    intMatrix[firstDim, secDim] = opNum;
                    secDim--;

                }

                step4++;
                stepG++;
                secDim++;
                firstDim++;
                if (opNum==elements)
                {
                    break;
                }


            }
        for (int m=0, i=0; m<Num; m++)

        {
            Console.WriteLine();
            for (i=0; i<Num; i++)
            {
                Console.Write("|{0,3}",intMatrix[i,m]);
            }

        }
        Console.WriteLine();

        }
    }
}