AdventOfCodeDay16.cs

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using System.Text.RegularExpressions;

namespace AdventOfCodeDay16
{
	class Program
	{
		static void Main(string[] args)
		{

			var ss = new StreamReader("../../input1.txt");

			string line;
			var input = new List<string>();

			var sues = new List<Sue>();

			while ((line = ss.ReadLine()) != null)
			{
				input.Add(line);
				var nameEndsAt = line.IndexOf(':');
				var name = line.Substring(0, nameEndsAt);
				var sue = new Sue
				{
					Name = name
				};

				var parts = line.Substring(nameEndsAt + 2).Split(',');

				foreach (var t in parts)
				{
					var item = t.Trim().Split(':');
					var value = int.Parse(item[1].Trim());

					switch (item[0])
					{
						case "children":
							sue.Children = value;
							break;
						case "cats":
							sue.Cats = value;
							break;
						case "samoyeds":
							sue.Samoyeds = value;
							break;
						case "pomeranians":
							sue.Pomeranians = value;
							break;
						case "akitas":
							sue.Akitas = value;
							break;
						case "vizslas":
							sue.Vizslas = value;
							break;
						case "goldfish":
							sue.Goldfish = value;
							break;
						case "trees":
							sue.Trees = value;
							break;
						case "cars":
							sue.Cars = value;
							break;
						case "perfumes":
							sue.Perfumes = value;
							break;
					}
				}
				sues.Add(sue);
			}

			// for part 1 change all < to = 
			var matches = sues.Where(a =>
							(a.Children == 3 || a.Children == null) &&
							(a.Cats > 7 || a.Cats == null) &&
							(a.Samoyeds == 2 || a.Samoyeds == null) &&
							(a.Pomeranians < 3 || a.Pomeranians == null) &&
							(a.Akitas == 0 || a.Akitas == null) &&
							(a.Vizslas == 0 || a.Vizslas == null) &&
							(a.Goldfish < 5 || a.Goldfish == null) &&
							(a.Trees > 3 || a.Trees == null) &&
							(a.Cars == 2 || a.Cars == null) &&
							(a.Perfumes == 1 || a.Perfumes == null)).ToList();

			foreach (var m in matches)
			{
				Console.WriteLine(m.Name);
			}

			Console.ReadLine();
		}
	}

	public class Sue
	{
		public string Name { get; set; }
		public int? Children { get; set; }
		public int? Cats { get; set; }
		public int? Samoyeds { get; set; }
		public int? Pomeranians { get; set; }
		public int? Akitas { get; set; }
		public int? Vizslas { get; set; }
		public int? Goldfish { get; set; }
		public int? Trees { get; set; }
		public int? Cars { get; set; }
		public int? Perfumes { get; set; }
	}
}