using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.IO;

namespace Laba11
{
    class Program
    {
       static void task1(string filename, char a)
        {
            StreamReader file = new StreamReader(filename);
            int k = 0;
            string line = String.Empty;
            while((line = file.ReadLine()) != null)
            {
                if (line[0] == a)
                {
                    Console.WriteLine(line);
                    k++;
                }
            }
            file.Close();
            Console.WriteLine(k);
        }
        static void task2(string filename, char a)
        {
            StreamReader file = new StreamReader(filename);
            int k = 0;
            string line = String.Empty;
            while ((line = file.ReadLine()) != null)
            {
                if ((line[0] == a) && (line[line.Length - 1] == a))
                    k++;
            }
            file.Close();
            Console.WriteLine(k);
        }
        static void task3(string filename)
        {
            StreamReader file = new StreamReader(filename);
            int max = 0;
            string line = String.Empty;
            while ((line = file.ReadLine()) != null)
            {
                if (line.Length > max)
                    max = line.Length;
            }
            Console.WriteLine("the longest string is: {0}", max);
            file.Close();
            Console.WriteLine();
        }

        static void task4(string filename)
        {
            StreamReader file = new StreamReader(filename);
            int min = 99999;
            string line = String.Empty;
            while ((line = file.ReadLine()) != null)
            {
                if (line.Length < min)
                    min = line.Length;
            }
            Console.WriteLine("the shortest string is: {0}", min);
            file.Close();
            Console.WriteLine();
        }

        static void task5(string filename)
        {
            StreamReader file = new StreamReader(filename);
            int max = 0, c = 0;
            int k = 0;
            string line = String.Empty;
            while ((line = file.ReadLine()) != null)
            {
                if (line.Length > max)
                {
                    max = line.Length;
                    c = k;
                }
                k++;
            }
            Console.WriteLine("зе номер samoy dlinnoy stroki is {0}", c);
            file.Close();
            Console.WriteLine();
        }
        static void task6(string filename)
        {
            StreamReader file = new StreamReader(filename);
            int min = 9999, c = 0;
            int k = 0;
            string line = String.Empty;
            while ((line = file.ReadLine()) != null)
            {
                if (line.Length < min)
                {
                    min = line.Length;
                    c = k;
                }
                k++;
            }
            Console.WriteLine("зе номер samoy korotkoy stroki is {0}", c);
            file.Close();
            Console.WriteLine();
        }
        static void task7(string filename, char a)
        {
            StreamReader file = new StreamReader(filename);
            int k = 0;
            string line = String.Empty;
            while ((line = file.ReadLine()) != null)
            {
                if (line[0] == a)
                {
                    Console.WriteLine(line);
                    k++;
                }
            }
            file.Close();
            Console.WriteLine(k);
        }

        static void task8(string filename)
        {
            StreamReader file = new StreamReader(filename);
            int k = 0;
            string line = String.Empty;
            while ((line = file.ReadLine()) != null)
            {
                    Console.WriteLine(line[0]);
                    k++;
            }
            file.Close();
            Console.WriteLine(k);
        }

        static void task9(string filename)
        {
            StreamReader file = new StreamReader(filename);
            Console.WriteLine("введите верхний порог");
            int k1 = int.Parse(Console.ReadLine());
            Console.WriteLine("введите нижний порог");
            int k2 = int.Parse(Console.ReadLine()); ;
            string line = String.Empty;
            int n = 0;
            while ((line = file.ReadLine()) != null)
            {
                if ((n < k2) && (n > k1))

                    Console.WriteLine(line);
                n++;
            }
            file.Close();
        }
        static void task10(string filename)
        {
            StreamReader file = new StreamReader(filename);


        }

        static void task14(string filename)
        {
            StreamReader file = new StreamReader(filename);
            Console.WriteLine("введите верхний порог");
            int k1 =int.Parse(Console.ReadLine());
            Console.WriteLine("введите нижний порог");
            int k2 = int.Parse(Console.ReadLine()); ;
            string line = String.Empty;
            int n = 1;
            while ((line = file.ReadLine()) != null)
            {
                if((n< k2) && (n> k1))

                    Console.WriteLine(line);
                n++;
            }
            file.Close();

        }

        static void Main(string[] args)
        {
            /*Console.WriteLine("задайте букву");
            char a = char.Parse(Console.ReadLine());*/
            string filename = "1.txt";
            //task1(filename, a);
            //task2(filename, a);
            //task3(filename);
            //task4(filename);
            //task5(filename);
            //task6(filename);
            // task7(filename);
            //task8(filename);
            task9(filename);
            //task10(filename);
            //task11(filename);
            // task12(filename);
            // task13(filename);
            //task14(filename);
            // task15(filename);

            Console.ReadKey();
        }
    }
}