using System;

using System.Collections.Generic;

​

public class Program

{

    public static void Main()

    {

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

        System.Random random = new System.Random();

        int count;

        for (int item = 0; item < 5; item++)

        {

            int num = random.Next(1, 11);

            count = random.Next(1,11);

            //Console.WriteLine(num);

            if(!menu.ContainsKey(num))

            {

                menu.Add(num, count);

                //Console.WriteLine("lunch number: {0}", num);

            }else{

                //Console.WriteLine("{0} exsits", num);

                item = item-1;

            }

        }

        foreach(KeyValuePair<int, int> pair in menu)

        {

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

        }

        Console.Write("Please input integers(from 1-10): ");

        string input = Console.ReadLine();

        int number;

        bool result = Int32.TryParse(input, out number);

        if(result)

        {

            if(menu.ContainsKey(number))

            {

            while(menu[number]>0)

            {   

                Console.WriteLine("You get a lunch {0}", number);

                menu[number] = menu[number]-1;

            }

            }else

            {

                Console.WriteLine("We do not have lunch {0} now", number);

            }

        }

    }

}