[StartCode]
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ConsoleApp11
{
    internal class Program
    {
        static void Main(string[] args)
        {
            string[] fullNames = new string[0];
            string[] positions = new string[0];
            string menuOption;
            bool exit = false;

            while (exit == false)
            {
                Console.WriteLine("        МЕНЮ");
                Console.WriteLine();
                Console.WriteLine("1 - Добавить досье.\n2 - Список досье.\n3 - Удалить досье.\n4 - Поиск по фамилии.\n5 - Выход.");
                menuOption = Console.ReadLine();

                switch (menuOption)
                {
                    case "1":
                        AddElements(ref fullNames, ref positions);
                        break;
                    case "2":
                        ShowLists(fullNames, positions, "Список досье :");
                        break;
                    case "3":
                        DeleteDossier(ref fullNames, ref positions);
                        break;
                    case "4":
                        SearchSurname(fullNames, positions);
                        break;
                    case "5":
                        exit = true;
                        break;
                }
            }
        }

        static void AddElements(ref string[] fullNames, ref string[] positions)
        {
            AddElement(ref fullNames,"Добавить ФИО :");
            AddElement(ref positions,"Добавить должность :");
        }

        static void ShowLists(string[] fullNames, string[] positions, string text)
        {
            Console.WriteLine(text);
            int indent = 1;

            for (int i = 0; i < fullNames.Length; i++)
            {
                Console.WriteLine((i + indent) + ") " + fullNames[i] + " - " + positions[i] + ".");
            }
        }

        static void DeleteDossier(ref string[] fullNames, ref string[] positions)
        {
            int number = Convert.ToInt32(Console.ReadLine());
            DeleteElement(number, ref fullNames);
            DeleteElement(number, ref positions);
        }

        static void SearchSurname(string[] fullNames, string[] positions)
        {
            Console.WriteLine("Введите фамилию :");
            string surname = Console.ReadLine();

            for (int i = 0; i < fullNames.Length; i++)
            {
                string[] words = fullNames[i].Split(' ');

                if (words[0] == surname)
                {
                    Console.WriteLine(fullNames[i] + " - " + positions[i]);
                }
            }
        }

        static void DeleteElement(int number, ref string[] element)
        {
            if (0< number && number <= element.Length)
            {
                string[] tempElement = new string[element.Length - 1];

                for (int i = number - 1; i < element.Length - 1; i++)
                {
                    element[i] = element[i + 1];
                }

                for (int i = 0; i < element.Length - 1; i++)
                {
                    tempElement[i] = element[i];
                }

                element = tempElement;
            }
        }

        static void AddElement(ref string[] element,string text)
        {
            string[] tempElement = new string[element.Length + 1];

            for (int i = 0; i < element.Length; i++)
            {
                tempElement[i] = element[i];
            }

            Console.WriteLine(text);
            string newElement = Convert.ToString(Console.ReadLine());
            tempElement[tempElement.Length - 1] = newElement;
            element = tempElement;
        }
    }
}
[EndCode]