// Initial Requirements

// PART 1

// Given an input of an array of numbers, return a string that groups number sequences together.

​

// PART 2 (time permitting)

// Given an input of an array of dates within a 1 week window, return a string that represents those dates

// Concatenate adjacent days of the week, and comma seperate non-adjacent days

// Input: ["2021-08-23", "2021-08-24", "2021-08-25"]                    Output: "Mon - Wed"

// Input: ["2021-08-24", "2021-08-26"]                                  Output: "Tue, Thu"

// Input: ["2021-08-24", "2021-08-25", "2021-08-26", "2021-08-28"]      Output: "Tue - Thu, Sat"

//

// Part 3 (Time permitting)

// Evolved Requirements.  Arrive after first part has been implemented

// Support times as well.  

// Input: ["2021-08-23T11:00:00Z/2021-08-23T13:00:00Z", "2021-08-24T11:00:00Z/2021-08-24T13:00:00Z", "2021-08-25T11:00:00Z/2021-08-25T13:00:00Z"]   

// Output: "Mon - Wed, 11:00 - 13:00"

// Input: ["2021-08-23T13:00:00Z/2021-08-23T14:00:00Z", "2021-08-25T14:00:00Z/2021-08-25T15:00:00Z"]   

// Output: "Mon 13:00 - 14:00, Wed 14:00 - 15:00"

​

using System;

using System.Collections.Generic;

public class Program

{

    public static void Main()

    {

        List<DateTime> myDates = new List<DateTime>();

        myDates.Add(new DateTime(2021,8,23));

        myDates.Add(new DateTime(2021,8,24));

        myDates.Add(new DateTime(2021,8,25));

        DateTime dateHold = DateTime.MinValue;

        int counter = 0;

        bool isSeq = true;

        foreach (var item in myDates){

            var dayofweek = item.DayOfWeek;

            //Console.WriteLine(dayofweek);

            counter++;

            if (counter == 1 && item.AddDays(-1) == dateHold){

                isSeq = true;

                Console.WriteLine(isSeq);

            }

            else{

                isSeq = false;

                Console.WriteLine(isSeq);

            }

            dateHold = item;

            if (counter == myDates.Count){

            }

        }

        Console.WriteLine("Hello World");

    }

}