1.3.8.5

using System;

namespace ForLesson15
{
    class Program
    {
        static void Main ()
        {
            DrawPiramid ( 6 );
        }
        static int Rounded ( int i )
        {
            if ( i % 2 == 0 )
            {
                return i / 2;
            }
            else
            {
                return(i/2)+1;
            }
        }
        static void DrawPiramid ( int size )
        {
            if ( size % 2 == 0 )
            {
                for ( int i = 0 ; i < size / 2 ; i++ )
                {
                    int tempsize = i + 1;
                    for ( int j = 0 ; j < size ; )
                    {
                        while ( j < size / 2 )
                        {
                            if ( j < tempsize )
                            {
                                Console.Write ( j + 1 );
                            }
                            else
                            {
                                Console.Write ( tempsize );
                            }
                            j++;
                        }

                        while ( j > 0 )
                        {
                            if ( j < tempsize )
                            {
                                Console.Write ( j );
                            }
                            else
                            {
                                Console.Write ( tempsize );
                            }
                            j--;
                        }
                        break;
                    }
                    Console.WriteLine ();
                }

                for ( int i = size / 2 ; i > 0 ; i-- )
                {
                    int tempsize = i;
                    for ( int j = 0 ; j < ( size ) ; )
                    {
                        while ( j < size / 2 )
                        {
                            if ( j < tempsize )
                            {
                                Console.Write ( j + 1 );
                            }
                            else
                            {
                                Console.Write ( tempsize );
                            }
                            j++;
                        }

                        while ( j > 0 )
                        {
                            if ( j < tempsize )
                            {
                                Console.Write ( j );
                            }
                            else
                            {
                                Console.Write ( tempsize );
                            }
                            j--;
                        }
                        break;
                    }
                    Console.WriteLine ();
                }
            }
            else
            {
                for ( int i = 0 ; i < (size / 2)+1 ; i++ )
                {
                    int tempsize = i + 1;
                    for ( int j = 1 ; j < size ; )
                    {
                        while ( j < (size / 2)+1 )
                        {
                            if ( j < tempsize )
                            {
                                Console.Write ( j );
                            }
                            else
                            {
                                Console.Write ( tempsize );
                            }
                            j++;
                        }

                        while ( j > 0 )
                        {
                            if ( j < tempsize )
                            {
                                Console.Write ( j );
                            }
                            else
                            {
                                Console.Write ( tempsize );
                            }
                            j--;
                        }
                        break;
                    }
                    Console.WriteLine ();
                }

                for ( int i = (size / 2) ; i > 0 ; i-- )
                {
                    int tempsize = i;
                    for ( int j = 1 ; j < ( size ) ; )
                    {
                        while ( j < (size / 2)+1)
                        {
                            if ( j < tempsize )
                            {
                                Console.Write ( j  );
                            }
                            else
                            {
                                Console.Write ( tempsize );
                            }
                            j++;
                        }

                        while ( j > 0 )
                        {
                            if ( j < tempsize )
                            {
                                Console.Write ( j );
                            }
                            else
                            {
                                Console.Write ( tempsize );
                            }
                            j--;
                        }
                        break;
                    }
                    Console.WriteLine ();
                }
            }
        }
    }
}