info érettségi 2012

using System;
using System.Collections.Generic;
using System.Globalization;
using System.IO;
using System.Linq;

namespace Fuvar
{
    public class TripData
    {
        public TripData(int day, int tripNo, int kilometers)
        {
            Day = day;
            TripNo = tripNo;
            Kilometers = kilometers;
        }

        public int Day { get; private set; }
        public int TripNo { get; private set; }
        public int Kilometers { get; private set; }
    }

    public class Program
    {
        public static void Main(string[] args)
        {
            var trips = new List<TripData>();

            using (var reader = new StreamReader("tavok.txt"))
            {
                string line;
                while ((line = reader.ReadLine()) != null)
                {
                    var parts = line.Split(' ');
                    trips.Add(new TripData(int.Parse(parts[0]), int.Parse(parts[1]), int.Parse(parts[2])));
                }
            }

            var tripsByDay = (from trip in trips
                group trip by trip.Day into day
                orderby day.Key
                select new
                {
                    Day = day.Key,
                    Trips = day.OrderBy(t => t.TripNo).ToList(),
                    Total = day.Sum(t => t.Kilometers)
                }).ToList();

            Console.WriteLine("2. feladat: {0} kilométeres az első fuvar.", tripsByDay.First().Trips.First().Kilometers);
            Console.WriteLine("3. feladat: {0} kilométeres az utolsó fuvar.", tripsByDay.Last().Trips.Last().Kilometers);
            Console.WriteLine("4. feladat: a következő napokon nem dolgozott a futár: {0}.", string.Join(", ", Enumerable.Range(1, 7).Except(tripsByDay.Select(t => t.Day)).Select(d => d.ToString(CultureInfo.InvariantCulture))));
            Console.WriteLine("5. feladat: a legtöbb fuvart a {0}. napon tette meg a futár.", tripsByDay.OrderByDescending(d => d.Trips.Count()).First().Day);

            Console.WriteLine("6. feladat:");
            for (var i = 1; i <= 7; i++)
            {
                var day = tripsByDay.FirstOrDefault(d => d.Day == i);
                Console.WriteLine("{0}. nap: {1} km", i, day != null ? day.Total : 0);
            }

            Console.Write("7. feladat: kérem a távolságot (szám): ");
            var price = GetPriceForDistance(int.Parse(Console.ReadLine()));
            Console.WriteLine("Az út {0} forintba kerülne.", price);

            using (var writer = new StreamWriter("dijazas.txt"))
            {
                foreach (var day in tripsByDay)
                {
                    foreach (var trip in day.Trips)
                    {
                        writer.WriteLine("{0}. nap {1}. út: {2} Ft", day.Day, trip.TripNo, GetPriceForDistance(trip.Kilometers));
                    }
                }
            }

            Console.WriteLine("8. feladat: dijazas.txt létrehozva!");
            Console.Write("A program gombnyomásra kilép...");
            Console.ReadKey();
        }

        private static int GetPriceForDistance(int distance)
        {
            if (distance <= 2) return 500;
            if (distance <= 5) return 700;
            if (distance <= 10) return 900;
            if (distance <= 20) return 1400;
            return 2000;
        }
    }
}