04. Printing Triangle

using System;

namespace PrintingTriangle
{
    class Program
    {
        static void Main(string[] args)
        {
            int num = int.Parse(Console.ReadLine());

            PrintingTriangle(num);
        }
        static void PrintingTriangle(int num)
        {

            for (int i = 1; i <= num; i++)
            {
                for (int j = 1; j < i + 1; j++)
                {
                    Console.Write($"{j} ");
                }
                Console.WriteLine();
            }

            for (int i = num - 1; i > 0; i--)
            {
                for (int j = 1; j <= i; j++)
                {
                    Console.Write($"{j} ");
                }
                Console.WriteLine();
            }
        }
    }
}