[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":
                        AddElement(ref fullNames, ref positions);
                        break;
                    case "2":
                        ShowLists(fullNames, positions, "Список досье :");
                        break;
                    case "3":
                        DeleteElements(ref fullNames,ref positions);
                        break;
                    case "4":
                        SearchSurname(fullNames, positions);
                        break;
                    case "5":
                        exit = true;
                        break;
                }
            }
        }

        static void AddElement(ref string[] fullName, ref string[] position)
        {
            string[] tempFullName = new string[fullName.Length + 1];
            string[] tempPosition = new string[position.Length + 1];

            for (int i = 0; i < fullName.Length; i++)
            {
                tempFullName[i] = fullName[i];
                tempPosition[i] = position[i];
            }

            Console.WriteLine("Добавить ФИО :");
            string newFullName = Convert.ToString(Console.ReadLine());
            tempFullName[tempFullName.Length - 1] = newFullName;
            fullName = tempFullName;
            Console.WriteLine("Добавить должность :");
            string newPosition = Convert.ToString(Console.ReadLine());
            tempPosition[tempPosition.Length - 1] = newPosition;
            position = tempPosition;
        }

        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 DeleteElements(ref string[] fullName, ref string[] position)
        {
            int number = Convert.ToInt32(Console.ReadLine());
            DeleteElement(ref number, ref fullName);
            DeleteElement(ref number, ref position);
        }

        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]);
                }

                else
                {
                    Console.WriteLine("Такого в списке нету.");
                }
            }
        }

        static void DeleteElement(ref int number , ref string[] element)
        {
            if (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;
            }
        }
    }
}
[EndCode]