HW

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

namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {

        }
        static void Page119ExerciseTwentyNine()
        {
            char letter1, letter2;
            int distance = 0;
            for (int i = 0; i < 20; i++)
            {
                Console.Write("Char1: ");
                letter2 = char.Parse(Console.ReadLine());
                Console.Write("Char2: ");
                letter1 = char.Parse(Console.ReadLine());
                if ((int)letter2 > (int)letter1)
                {
                    distance = (int)('z') - (int)(letter2) + ((int)letter1 - (int)('a'));
                    Console.WriteLine(distance);
                }
                else
                    Console.WriteLine(Math.Abs((int)letter2 - (int)letter1 + 1));
            }
        }
        static void Page118Exercise24()
        {
            int d;
            for (int i = 1; i < 301; i++)
            {
                if (int.TryParse(Math.Sqrt(i).ToString(), out d))
                    Console.WriteLine(i);
                for (int k = 0; k < i; k++)
                    if (k*k == i)
                        Console.WriteLine(i);
            }
        }
        static void Page119Exercise31()
        {
            int age, groupOne = 0, groupTwo = 0;
            for (int i = 0; i < 150; i++)
            {
                age = int.Parse(Console.ReadLine());
                if (age > 7 && age < 12)
                    groupOne++;
                if (age > 11 && age < 16)
                    groupTwo++;
            }
            int groupOneTeachers = groupOne / 7;
            int groupTwoTeachers = groupTwo / 7;
            if (groupOne % 7 != 0)
                groupOneTeachers++;
            if (groupTwo % 7 != 0)
                groupTwoTeachers++;
            Console.WriteLine("Group one size: {0}\nNumber of teachers: {1}", groupOne, groupOneTeachers);
            Console.WriteLine("Group two size: {0}\nNumber of teachers: {1}", groupTwo, groupTwoTeachers);
        }
        static void Page126Exercise42()
        {
            int num1, num2;
            int greater = 0;
            for (int i = 0; i < 20; i++)
            {
                Console.Write("First number: ");
                num1 = int.Parse(Console.ReadLine());
                Console.Write("Second number: ");
                num2 = int.Parse(Console.ReadLine());
                greater += Math.Max(num1, num2);
            }
            Console.WriteLine("Average: {0}", (double)greater / 20);
        }
        static void Page126Exercise43()
        {
            double time, timesTotal = 0;
            int id;
            for (int i = 0; i < 40; i++)
            {
                Console.Write("Time taken: ");
                time = int.Parse(Console.ReadLine());
                if (time > 5)
                    Console.WriteLine("Not going to finals.");
                if (time < 4)
                {
                    Console.WriteLine("Car id");
                    id = int.Parse(Console.ReadLine());
                }
                timesTotal += time;
            }
            Console.WriteLine("Average time: {0}", timesTotal / 40);
        }
    }
}