Advent of Code Day 21: RPG Simulator 20XX

// Advent of Code
// Day 21: RPG Simulator 20XX

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

namespace AdventOfCode
{
    public class AdventOfCode21
    {
        public static void Main(string[] args)
        {
            Item[] weapons = new Item[]
            {
                new Item("Dagger", 8, 4, 0),
                new Item("Shortsword", 10, 5, 0),
                new Item("Warhammer", 25, 6, 0),
                new Item("Longsword", 40, 7, 0),
                new Item("Greataxe", 74, 8, 0)
            };

            Item[] armor = new Item[]
            {
                new Item("Leather", 13, 0, 1),
                new Item("Chainmail", 31, 0, 2),
                new Item("Splintmail", 53, 0, 3),
                new Item("Bandedmail", 75, 0, 4),
                new Item("Platemail", 102, 0, 5)
            };

            Item[] rings = new Item[]
            {
                new Item("Damage +1", 25, 1, 0),
                new Item("Damage +2", 50, 2, 0),
                new Item("Damage +3", 100, 3, 0),
                new Item("Defense +1", 20, 0, 1),
                new Item("Defense +2", 40, 0, 2),
                new Item("Defense +3", 80, 0, 3)
            };

            List<Player> wins = new List<Player>();
            List<Player> losses = new List<Player>();

            for (int i=0; i < weapons.Length; i++)
            {
                for (int j = -1; j < armor.Length; j++)
                {
                    for (int k = -1; k < rings.Length; k++)
                    {
                        for (int l = -1; l <= k; l++)
                        {
                            if (k >= 0 && k == l) { continue; }

                            Player boss = new Player(104) { Damage = 8, Armor = 1 };
                            Player player = new Player(100);
                            player.Equip(weapons[i]);
                            if (j >= 0) { player.Equip(armor[j]); }
                            if (k >= 0) { player.Equip(rings[k]); }
                            if (l >= 0) { player.Equip(rings[l]); }

                            if (Shots(player, boss) >= Shots(boss, player))
                            {
                                wins.Add(player);
                            }
                            else
                            {
                                losses.Add(player);
                            }
                        }
                    }
                }
            }

            Player minWinner = wins.OrderBy(p => p.Spent).First();
            Console.WriteLine("Min winner: " + minWinner.Spent + " (" + String.Join(", ", minWinner.Arsenal.Select(i => i.Name)) + ")");

            Player maxLoser = losses.OrderBy(p => p.Spent).Last();
            Console.WriteLine("Max loser: " + maxLoser.Spent + " (" + String.Join(", ", maxLoser.Arsenal.Select(i => i.Name)) + ")");

            Console.ReadKey();
        }

        private static int Shots(Player a, Player b)
        {
            int shotDamage = Math.Max(b.Damage - a.Armor, 1);
            int shots = a.HitPoints / shotDamage;
            int rem = a.HitPoints % shotDamage;
            return shots + (rem > 0 ? 1 : 0);
        }

        private class Player
        {
            public int HitPoints { get; set; }
            public int Damage { get; set; }
            public int Armor { get; set; }
            public int Spent { get; private set; }
            public List<Item> Arsenal { get; private set; }

            public Player(int hitPoints)
            {
                this.HitPoints = hitPoints;
                Arsenal = new List<Item>();
            }

            public void Equip(Item item)
            {
                this.Damage += item.Damage;
                this.Armor += item.Armor;
                this.Spent += item.Cost;
                this.Arsenal.Add(item);
            }
        }

        private class Item
        {
            public string Name { get; }
            public int Cost { get; }
            public int Damage { get; }
            public int Armor { get; }

            public Item(string name, int cost, int damage, int armor)
            {
                this.Name = name;
                this.Cost = cost;
                this.Damage = damage;
                this.Armor = armor;
            }
        }
    }
}