using System;

public class Program

{

    public static void Main(string[] args)

        {

            string input;

            int rows;

            int sum = 1;

            int total = 0;

            int all = 0;

            int step;

            Console.WriteLine("Pascal's Triangle");

            Console.Write("Enter a row number: ");

            input = Console.ReadLine();

            if (Int32.TryParse(input, out rows) == true && rows >= 0 && rows < 26)

            {

                for (int i = 0; i < rows; i++) //ROWS

                {

                    for (int j = 0; j <= i; j++)

                    {

​

                            if (j == 0 || i == 0)

                                sum = 1;

                            else

                                sum = sum * (i - j + 1) / j;

                        total += sum;

                    }

                }

                for (int i = 0; i < rows + 2; i++) //ROWS

                {

                    int holder = 0;

                    for (int spaces = 1; spaces <= rows - i; spaces++) //pagitan

                        Console.Write(" ");

                    for (int j = 0; j <= i; j++)

                    {

​

​

                        if (j == 0 || i == 0)

                            sum = 1;

                        else

                            sum = sum * (i - j + 1) / j;

                        holder += sum;

                        Console.Write(sum + " ");

​

                    }

                    Console.WriteLine();

                    all = holder;

                }

            step = rows + 1;

            Console.WriteLine();

            Console.WriteLine("The sum of numbers above row {0} is {1:#,0}.\nThe sum of numbers in row {2} is {3:#,0}.", rows, total, step, all);

        }

        else {

            Console.WriteLine("Enter a valid number");

        }                 

            }

}