//CATUNGAL, MARK ANGELO S.

//CCP 1103 - ITBC

//PASCAL'S TRIANGLE

​

using System;

​

namespace PascalsTriangle

{

    public class Program

    {

        public static void Main(string[] args)

        {

            int inputNumber;

            int outputOne;

            int firstSum;

            int outputTwo;

            int secondSum;

            string result;

​

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

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

            result = Console.ReadLine();

​

            if (Int32.TryParse(result, out inputNumber) == true)

            {

                if (inputNumber < 0)

                {

                    Console.WriteLine("Input number less than zero is not allowed.");

                }

                else if (inputNumber > 25)

                {

                    Console.WriteLine("Input number greater than 25 is not allowed.");

                }

                else

                {

                    firstSum = 0;

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

                    {

                        outputOne = 1;

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

                        {

                            if (j == 0)

                            {

                                outputOne = 1;

                            }

                            else

                            {

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

                            }

                            firstSum = firstSum + outputOne;

                        }

                    }

                    Console.WriteLine("The sum of numbers above row {0} is {1}.", inputNumber, firstSum);

                    secondSum = 0;

                    for (int i = 0; i <= inputNumber + 1; i++)

                    {

                        outputTwo = 1;

​

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

                        {

                            if (j == 0)

                            {

                                outputTwo = 1;

​

                                if (i == inputNumber + 1)

                                {

                                    secondSum = secondSum + outputTwo;

                                }

                            }

                            else

                            {

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

​

                                if (i == inputNumber + 1)

                                {

                                    secondSum = secondSum + outputTwo;

                                }

                            }

                        }

                    }

                    Console.Write("The sum of numbers in row {0} is {1}.", inputNumber + 1, secondSum);

                }

            }

            else

            {

                Console.WriteLine("Invalid input. Please enter a numeric value.");

            }

        }

    }

}