using System;
using System.Collections.Generic;

public class TrainCar
{
    public string Type { get; set; }
    public int Capacity { get; set; }

    public TrainCar(string type, int capacity)
    {
        Type = type;
        Capacity = capacity;
    }
}

public class Station
{
    public string Name { get; set; }
    public int PassengersBoarding { get; set; }
    public int PassengersLeaving { get; set; }

    public Station(string name, int boarding, int leaving)
    {
        Name = name;
        PassengersBoarding = boarding;
        PassengersLeaving = leaving;
    }
}

public class Train
{
    private List<TrainCar> cars = new List<TrainCar>();
    private int totalPassengers = 0;

    public void AddCar(TrainCar car)
    {
        cars.Add(car);
    }

    public int GetTotalCapacity()
    {
        int totalCapacity = 0;
        foreach (var car in cars)
        {
            totalCapacity += car.Capacity;
        }
        return totalCapacity;
    }

    public void UpdateStations(List<Station> stations)
    {
        foreach (var station in stations)
        {
            Console.WriteLine($"Arriving at {station.Name}...");

            // تحديث عدد الركاب بناءً على المغادرين
            totalPassengers -= station.PassengersLeaving;

            // التأكد من عدم مغادرة عدد أكبر من الموجودين
            if (totalPassengers < 0)
            {
                Console.WriteLine("Error: More passengers leaving than on board!");
                return;
            }

            // إضافة الركاب الصاعدين
            if (totalPassengers + station.PassengersBoarding > GetTotalCapacity())
            {
                Console.WriteLine("Error: Not enough capacity for all boarding passengers!");
                return;
            }

            totalPassengers += station.PassengersBoarding;

            // طباعة المعلومات الخاصة بالمحطة
            PrintStationInfo(station);
        }
    }

    private void PrintStationInfo(Station station)
    {
        Console.WriteLine($"At {station.Name}:");
        Console.WriteLine($"- Passengers Boarding: {station.PassengersBoarding}");
        Console.WriteLine($"- Passengers Leaving: {station.PassengersLeaving}");
        Console.WriteLine($"- Total Passengers Now: {totalPassengers}");
        Console.WriteLine(new string('-', 30));
    }
}

class Program
{
    static void Main(string[] args)
    {
        Train train = new Train();

        // إضافة عربات للقطار
        train.AddCar(new TrainCar("A", 40));
        train.AddCar(new TrainCar("B", 25));
        train.AddCar(new TrainCar("C", 10));

        // تعريف المحطات
        List<Station> stations = new List<Station>
        {
            new Station("Station 1", 20, 0),
            new Station("Station 2", 10, 5),
            new Station("Station 3", 15, 10),
            new Station("Station 4", 5, 20),
            new Station("Station 5", 0, 10)
        };

        // تحديث المحطات
        train.UpdateStations(stations);
    }
}