Associative Arrays - Exercise - 03. Legendary Farming

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

namespace LegendaryFarming
{
    class Program
    {
        static void Main(string[] args)
        {
            bool itemObtained = false;
            Dictionary<string, int> keymaterials = new Dictionary<string, int>();
            keymaterials.Add("shards", 0);
            keymaterials.Add("fragments", 0);
            keymaterials.Add("motes", 0);
            Dictionary<string, int> junk = new Dictionary<string, int>();
            string obtainedItem = "";
            while (!itemObtained)
            {
                string[] input = Console.ReadLine().ToLower().Split().ToArray();
                List<string> materials = new List<string>();
                List<int> quantities = new List<int>();
                for (int i = 1; i <= input.Length; i++)//
                {
                    if (i % 2 != 0)
                        quantities.Add(int.Parse(input[i - 1]));//
                    else
                        materials.Add(input[i - 1]);//
                }
                for (int i = 0; i < materials.Count; i++)
                {
                    if (materials[i] == "shards" || materials[i] == "fragments" || materials[i] == "motes")
                    {
                        if (keymaterials.ContainsKey(materials[i]))
                        {
                            keymaterials[materials[i]] += quantities[i];
                        }
                        if (keymaterials[materials[i]] >= 250)
                        {
                            switch (materials[i])
                            {
                                case "shards":
                                    obtainedItem = "Shadowmourne";
                                    break;
                                case "fragments":
                                    obtainedItem = "Valanyr";
                                    break;
                                case "motes":
                                    obtainedItem = "Dragonwrath";
                                    break;
                            }
                            Console.WriteLine($"{obtainedItem} obtained!");
                            itemObtained = true;
                            keymaterials[materials[i]] -= 250;
                            break;
                        }
                    }
                    else
                    {
                        if (junk.ContainsKey(materials[i]))
                        {
                            junk[materials[i]] += quantities[i];
                        }
                        else
                            junk.Add(materials[i], quantities[i]);
                    }
                }
            }
            foreach (var item in keymaterials.OrderByDescending(i => i.Value).ThenBy(i => i.Key))
            {
                Console.WriteLine($"{item.Key}: {item.Value}");
            }
            foreach (var item in junk.OrderBy(i=>i.Key))
            {
                Console.WriteLine($"{item.Key}: {item.Value}");
            }
        }
    }
}