using System;

​

namespace ConsoleApplication3

{

    public class Program

    {

       public static void Main(string[] args)

        {

            int num, space, i,j;

​

            Console.WriteLine("Input no of lines");

            num = Convert.ToInt32(Console.ReadLine());

​

​

            for (i = 1; i <= num; i++)

            {

                for (space = 1; space <= (num - i); space++)

                {

                    Console.Write(" ");

                }

​

                for (j = 1; j <= i; j++)

                {

                    Console.Write("{0} ", j);

                }

                Console.WriteLine();

            }

        }

    }

}

​