Phonebook_Dictionaries_Ex02

using System;
using System.Collections.Generic;
using System.Linq;

namespace Feb26_2018
{
    class MainClass
    {
        /* */

        public static void Main()
        {
            //int k = int.Parse(Console.ReadLine());
            //var input = Console.ReadLine()
            //                   .Split()
            //                   .Select(double.Parse)
            //                   .ToList();

            //var firstK = input.Take(k);
            //var asd = input.ToArray().Reverse();
            //Console.WriteLine(asd);
            char[] sep = {' '};
            string input;
            SortedDictionary<string, string> phoneBook = new SortedDictionary<string, string>();
            while((input = Console.ReadLine()) != "END")
            {
                string[] commands = input.Split(sep, StringSplitOptions.RemoveEmptyEntries);

                if(commands[0] == "A")
                {
                    if(phoneBook.ContainsKey(commands[1]))
                    {
                        phoneBook[commands[1]] = commands[2];
                    }
                    else
                    {
                        phoneBook.Add(commands[1], commands[2]);
                    }
                }
                else if(commands[0] == "S")
                {
                    if(phoneBook.ContainsKey(commands[1]))
                    {
                        var name = commands[1];
                        var number = phoneBook[commands[1]];
                        Console.WriteLine("{0} -> {1}", name, number);
                    }
                    else
                    {
                        Console.WriteLine("Contact {0} does not exist.", commands[1]);
                    }
                }
                else if(commands[0] == "ListAll")
                {
                    foreach(var contact in phoneBook)
                    {
                        var name = contact.Key;
                        var number = contact.Value;
                        Console.WriteLine("{0} -> {1}", name, number);
                    }
                }
            }
        }
    }
}