using System;

using System.Collections.Generic;

public class Program

{   

    public static int maxCount = 0 ;

    public static int maxLunch = 0; 

    public static List<int> lunchNotAvailable = new List<int>(){1,2,3,4,5,6,7,8,9,10};

    public static void Main()

    {   

        Random rnd = new Random(0);

        Dictionary<int,int> CafeLunch = new Dictionary<int,int>();

        while (CafeLunch.Count < 5){

            int randomLunchItem = rnd.Next(1,11);

            int randomLunchCount = rnd.Next(1,11);

            if (! CafeLunch.ContainsKey(randomLunchItem)){

              CafeLunch.Add(randomLunchItem,randomLunchCount);

            }

        }

          foreach(KeyValuePair<int,int> pair in CafeLunch){

              notAvailable(pair.Key);

              int currentCount = pair.Value;

              if (maxCount < currentCount){

                  maxCount = currentCount;

                  maxLunch = pair.Key;

               }else if (maxCount == currentCount && pair.Key < maxLunch){

                  maxLunch = pair.Key;

              }

              Console.WriteLine("Key = {0}, value = {1}",pair.Key,pair.Value);

          }

             while (true){

          Console.WriteLine("Please enter lunch number:");

          int userRequest = Convert.ToInt32(Console.ReadLine());

          if ((userRequest < 1 || userRequest > 10) || userRequest == 0){

           break;

          }else if(! CafeLunch.ContainsKey(userRequest) || CafeLunch[userRequest] < 1){

              Console.WriteLine("We do not have lunch {0} now. Would you like to try lunch {1}?",userRequest,maxLunch);

            }else{ 

              CafeLunch[userRequest] -= 1;

              if (CafeLunch[userRequest] == 0){

                addNotAvailable(userRequest);

              } 

              Console.WriteLine("You get a lunch {0}!Currently we do not have the following lunches: {1}",userRequest,printNotAvailable());}   

             maxCount = 0;

             maxLunch = 0;

              foreach(KeyValuePair<int,int> pair in CafeLunch){

             int currentCount = pair.Value;

                if (maxCount < currentCount){

                  maxCount = currentCount;

                  maxLunch = pair.Key;

               }else if (maxCount == currentCount && pair.Key < maxLunch){

                  maxLunch = pair.Key;

              }  

              Console.WriteLine("Key = {0}, value = {1}",pair.Key,pair.Value);

           }    

          }

         }

        static void notAvailable(int lunch){

         lunchNotAvailable.Remove(lunch);

        }

      static void addNotAvailable(int lunch){

        lunchNotAvailable.Add(lunch);

      } 

        static string printNotAvailable(){

            string concatLunch = "";

          for ( int i = 0 ; i < lunchNotAvailable.Count; i ++){

             concatLunch +=  lunchNotAvailable[i].ToString () + ",";

           }  

           return concatLunch;

          }

        }

​

​