11. Pokemon Trainer

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

public class StartUp
{
    static List<Trainer> trainers;

    public static void Main()
    {
        trainers = new List<Trainer>();
        AddTrainers();

        CheckPokemons();

        PrintTrainers();
    }

    private static void PrintTrainers()
    {
        foreach (var t in trainers.OrderByDescending(t => t.Badges))
        {
            Console.WriteLine($"{t.Name} {t.Badges} {t.Pokemons.Count}");
        }
    }

    private static void CheckPokemons()
    {
        string element;
        while ((element = Console.ReadLine()) != "End")
        {
            foreach (var trainer in trainers)
            {
                if (trainer.Pokemons.Count(p => p.Element == element) > 0)
                {
                    trainer.Badges++;
                }
                else
                {
                    trainer.Pokemons.Select(p => p.Health -= 10).ToList();
                    trainer.Pokemons.RemoveAll(p => p.Health <= 0);
                }
            }
        }
    }

    private static void AddTrainers()
    {
        string input;
        while ((input = Console.ReadLine()) != "Tournament")
        {
            string[] args = input.Split();
            string trainerName = args[0];
            string pokemonName = args[1];
            string pokemonElement = args[2];
            int pokemonHealth = int.Parse(args[3]);

            Pokemon pokemon = new Pokemon(pokemonName, pokemonElement, pokemonHealth);
            Trainer trainer = trainers.FirstOrDefault(t => t.Name == trainerName);

            if (trainer == null)
            {
                trainer = new Trainer(trainerName);
                trainers.Add(trainer);
            }
            trainer.Pokemons.Add(pokemon);
        }
    }
}

//////////////////

public class Pokemon
{
    public Pokemon(string name, string element, int health)
    {
        this.Name = name;
        this.Element = element;
        this.Health = health;
    }

    public string Name { get; set; }
    public string Element { get; set; }
    public int Health { get; set; }
}

//////////////////

using System.Collections.Generic;
public class Trainer
{
    public Trainer(string name)
    {
        this.Name = name;
    }

    public string Name { get; set; }
    public int Badges { get; set; } = 0;

    public List<Pokemon> Pokemons { get; set; } = new List<Pokemon>();
}