make ProcessInput virtual instead of abstract and remove empty method bodies

AOC.Common/Day.cs

@@ -2,23 +2,66 @@ using CommandLine;
 
 namespace AOC.Common;
 
+/// <summary>
+/// Base class for a day's solution. Provides stopwatch timing and command line parsing.
+/// </summary>
+/// <param name="year"></param>
+/// <param name="day"></param>
+/// <param name="puzzleName"></param>
 public abstract class Day(int year, int day, string puzzleName)
 {
+    /// <summary>
+    /// The year this Day is from.
+    /// </summary>
     public int Year { get; } = year;
+    /// <summary>
+    /// What day it is.
+    /// </summary>
     public int DayNumber { get; } = day;
+    /// <summary>
+    /// The name of the puzzle.
+    /// </summary>
     public string PuzzleName { get; } = puzzleName;
 
+    /// <summary>
+    /// Enumerable of all lines in the input file.
+    /// </summary>
     protected IEnumerable<string> Input => File.ReadLines(FileName);
+    
+    /// <summary>
+    /// Input file as a <see cref="ReadOnlySpan">span</see>.
+    /// </summary>
+    protected ReadOnlySpan<char> InputBytes => File.ReadAllText(FileName);
 
+    /// <summary>
+    /// Path to the input file in the format of "inputYEAR/dayNN.in".
+    /// </summary>
     public string FileName =>
         Path.Combine(AppDomain.CurrentDomain.BaseDirectory,
             $"input{Year}/{(UseTestInput ? "test" : "day")}{DayNumber,2:00}.in");
 
+    /// <summary>
+    /// A toggle to read the test input file instead of the real input.
+    /// </summary>
     public static bool UseTestInput { get; set; }
     private readonly Stopwatch _stopwatch = new();
 
-    public abstract void ProcessInput();
+    /// <summary>
+    /// Initial parsing of the puzzle input.
+    /// </summary>
+    public virtual void ProcessInput()
+    {
+    }
+    
+    /// <summary>
+    /// Solve Part 1.
+    /// </summary>
+    /// <returns>object whose string representation will be the answer</returns>
     public abstract object Part1();
+    /// <summary>
+    /// Solve Part 2.
+    /// </summary>
+    /// <returns>object whose string representation will be the answer</returns>
     public abstract object Part2();
 
     private void PrintProcessInput()
@@ -63,6 +106,12 @@ public abstract class Day(int year, int day, string puzzleName)
         public int? PartNumber { get; set; }
     }
 
+    /// <summary>
+    /// Parse the command line args and run the appropriate puzzles.
+    /// </summary>
+    /// <param name="args"></param>
+    /// <exception cref="ApplicationException"></exception>
+    /// <exception cref="ArgumentOutOfRangeException"></exception>
     public static void RunFromArgs(string[] args)
     {
         var days = Assembly.GetEntryAssembly()?.GetTypes()

AOC.Test/Test2023.cs

@@ -18,6 +18,7 @@ public class Test2023
     [DataRow(typeof(Day02), "8", "2286")]
     [DataRow(typeof(Day03), "4361", "467835")]
     [DataRow(typeof(Day04), "13", "30")]
+    // [DataRow(typeof(Day05), "35", "")]
     public void CheckTestInputs(Type dayType, string part1, string part2) =>
         Common.CheckDay(dayType, part1, part2, true);
 }

AOC2015/Day01.cs

@@ -2,10 +2,6 @@ namespace AOC2015;
 
 public class Day01() : Day(2015, 1, "Not Quite Lisp")
 {
-    public override void ProcessInput()
-    {
-    }
-
     public override object Part1()
     {
         var floor = 0;

AOC2015/Day03.cs

@@ -5,10 +5,6 @@ namespace AOC2015;
 /// </summary>
 public sealed class Day03() : Day(2015, 3, "Perfectly Spherical Houses in a Vacuum")
 {
-    public override void ProcessInput()
-    {
-    }
-
     public override object Part1()
     {
         int x = 0, y = 0;

AOC2015/Day06.cs

@@ -11,10 +11,6 @@ public sealed partial class Day06() : Day(2015, 6, "Probably a Fire Hazard")
     [GeneratedRegex(@"(\d+),(\d+) through (\d+),(\d+)")]
     private static partial Regex Coords();
 
-    public override void ProcessInput()
-    {
-    }
-
     public override object Part1()
     {
         foreach (var line in Input)

AOC2015/Day07.cs

@@ -8,10 +8,6 @@ public sealed class Day07() : Day(2015, 7, "Some Assembly Required")
     private readonly Dictionary<string, Func<ushort>> _actions = [];
     private readonly Dictionary<string, ushort> _wires = [];
 
-    public override void ProcessInput()
-    {
-    }
-
     public override object Part1()
     {
         ProcessInstructions();
@@ -116,4 +112,4 @@ public sealed class Day07() : Day(2015, 7, "Some Assembly Required")
         _actions["b"] = () => p1;
         return _actions["a"]();
     }
-}
+}

AOC2015/Day08.cs

@@ -8,10 +8,6 @@ public sealed partial class Day08() : Day(2015, 8, "Matchsticks")
     [GeneratedRegex("""^"(\\x..|\\.|.)*"$""")]
     private static partial Regex CharSet();
 
-    public override void ProcessInput()
-    {
-    }
-
     private static int CharCount(string arg) => CharSet().Match(arg).Groups[1].Captures.Count;
     private static int EncodedCount(string arg) => 2 + arg.Sum(c => c is '\\' or '\"' ? 2 : 1);
 

AOC2015/Day12.cs

@@ -11,10 +11,6 @@ public sealed partial class Day12() : Day(2015, 12, "JSAbacusFramework.io")
     [GeneratedRegex(@"-?\d+")]
     private static partial Regex Digits();
 
-    public override void ProcessInput()
-    {
-    }
-
     public override object Part1() =>
         Digits().Matches(Input.First()).Sum(n => int.Parse(n.Value));
 

AOC2015/Day16.cs

@@ -8,10 +8,6 @@ public sealed partial class Day16() : Day(2015, 16, "Aunt Sue")
     [GeneratedRegex(@": \d\d")]
     private static partial Regex TwoDigitsRegex();
 
-    public override void ProcessInput()
-    {
-    }
-
     private IEnumerable<string> Common() =>
         Input
             .Select(i => TwoDigitsRegex().Replace(i, ": 9"))

AOC2015/Day23.cs

@@ -5,10 +5,6 @@ namespace AOC2015;
 /// </summary>
 public sealed class Day23() : Day(2015, 23, "Opening the Turing Lock")
 {
-    public override void ProcessInput()
-    {
-    }
-
     private int RunOperations(int initialA = 0, int initialB = 0)
     {
         Dictionary<char, int> registers = new()
@@ -53,4 +49,4 @@ public sealed class Day23() : Day(2015, 23, "Opening the Turing Lock")
     public override object Part1() => RunOperations();
 
     public override object Part2() => RunOperations(1);
-}
+}

AOC2015/Day24.cs

@@ -5,10 +5,6 @@ namespace AOC2015;
 /// </summary>
 public sealed class Day24() : Day(2015, 24, "It Hangs in the Balance")
 {
-    public override void ProcessInput()
-    {
-    }
-
     public override object Part1() => "";
 
     public override object Part2() => "";

AOC2016/Day02.cs

@@ -5,10 +5,6 @@ namespace AOC2016;
 /// </summary>
 public sealed class Day02() : Day(2016, 2, "Bathroom Security")
 {
-    public override void ProcessInput()
-    {
-    }
-
     public override object Part1()
     {
         List<int> answer = [];

AOC2016/Day05.cs

@@ -7,10 +7,6 @@ namespace AOC2016;
 /// </summary>
 public sealed class Day05() : Day(2016, 5, "How About a Nice Game of Chess?")
 {
-    public override void ProcessInput()
-    {
-    }
-
     public override object Part1()
     {
         var s = Input.First();
@@ -55,4 +51,4 @@ public sealed class Day05() : Day(2016, 5, "How About a Nice Game of Chess?")
 
         return new string(answer);
     }
-}
+}

AOC2016/Day07.cs

@@ -11,10 +11,6 @@ public sealed partial class Day07() : Day(2016, 7, "Internet Protocol Version 7"
     [GeneratedRegex(@"\[(\w*)\]")]
     private static partial Regex InsideBracketsRegex();
 
-    public override void ProcessInput()
-    {
-    }
-
     private static bool SupportsTls(string input) =>
         !InsideBracketsRegex().Matches(input).Any(m => CheckAbba(m.ValueSpan)) &&
         BracketsRegex().Split(input).Any(v => CheckAbba(v));

AOC2016/Day08.cs

@@ -5,10 +5,6 @@ namespace AOC2016;
 /// </summary>
 public sealed class Day08() : Day(2016, 8, "Two-Factor Authentication")
 {
-    public override void ProcessInput()
-    {
-    }
-
     private static string PrintGrid(char[,] screen)
     {
         var sb = new StringBuilder();

AOC2016/Day09.cs

@@ -5,10 +5,7 @@ namespace AOC2016;
 /// </summary>
 public sealed class Day09() : Day(2016, 9, "Puzzle Name")
 {
-    public override void ProcessInput()
-    {
-    }
-
+    
     public override object Part1() => "";
 
     public override object Part2() => "";

AOC2016/Day10.cs

@@ -5,10 +5,6 @@ namespace AOC2016;
 /// </summary>
 public sealed class Day10() : Day(2016, 10, "Puzzle Name")
 {
-    public override void ProcessInput()
-    {
-    }
-
     public override object Part1() => "";
 
     public override object Part2() => "";

AOC2016/Day11.cs

@@ -5,10 +5,6 @@ namespace AOC2016;
 /// </summary>
 public sealed class Day11() : Day(2016, 11, "Puzzle Name")
 {
-    public override void ProcessInput()
-    {
-    }
-
     public override object Part1() => "";
 
     public override object Part2() => "";

AOC2016/Day12.cs

@@ -5,10 +5,6 @@ namespace AOC2016;
 /// </summary>
 public sealed class Day12() : Day(2016, 12, "Puzzle Name")
 {
-    public override void ProcessInput()
-    {
-    }
-
     public override object Part1() => "";
 
     public override object Part2() => "";

AOC2016/Day13.cs

@@ -5,10 +5,6 @@ namespace AOC2016;
 /// </summary>
 public sealed class Day13() : Day(2016, 13, "Puzzle Name")
 {
-    public override void ProcessInput()
-    {
-    }
-
     public override object Part1() => "";
 
     public override object Part2() => "";

AOC2016/Day14.cs

@@ -5,10 +5,6 @@ namespace AOC2016;
 /// </summary>
 public sealed class Day14() : Day(2016, 14, "Puzzle Name")
 {
-    public override void ProcessInput()
-    {
-    }
-
     public override object Part1() => "";
 
     public override object Part2() => "";

AOC2016/Day15.cs

@@ -5,10 +5,6 @@ namespace AOC2016;
 /// </summary>
 public sealed class Day15() : Day(2016, 15, "Puzzle Name")
 {
-    public override void ProcessInput()
-    {
-    }
-
     public override object Part1() => "";
 
     public override object Part2() => "";

AOC2016/Day16.cs

@@ -5,10 +5,6 @@ namespace AOC2016;
 /// </summary>
 public sealed class Day16() : Day(2016, 16, "Puzzle Name")
 {
-    public override void ProcessInput()
-    {
-    }
-
     public override object Part1() => "";
 
     public override object Part2() => "";

AOC2016/Day17.cs

@@ -5,10 +5,6 @@ namespace AOC2016;
 /// </summary>
 public sealed class Day17() : Day(2016, 17, "Puzzle Name")
 {
-    public override void ProcessInput()
-    {
-    }
-
     public override object Part1() => "";
 
     public override object Part2() => "";

AOC2016/Day18.cs

@@ -5,10 +5,6 @@ namespace AOC2016;
 /// </summary>
 public sealed class Day18() : Day(2016, 18, "Puzzle Name")
 {
-    public override void ProcessInput()
-    {
-    }
-
     public override object Part1() => "";
 
     public override object Part2() => "";

AOC2016/Day19.cs

@@ -5,10 +5,6 @@ namespace AOC2016;
 /// </summary>
 public sealed class Day19() : Day(2016, 19, "Puzzle Name")
 {
-    public override void ProcessInput()
-    {
-    }
-
     public override object Part1() => "";
 
     public override object Part2() => "";

AOC2016/Day20.cs

@@ -5,10 +5,6 @@ namespace AOC2016;
 /// </summary>
 public sealed class Day20() : Day(2016, 20, "Puzzle Name")
 {
-    public override void ProcessInput()
-    {
-    }
-
     public override object Part1() => "";
 
     public override object Part2() => "";

AOC2016/Day21.cs

@@ -5,10 +5,6 @@ namespace AOC2016;
 /// </summary>
 public sealed class Day21() : Day(2016, 21, "Puzzle Name")
 {
-    public override void ProcessInput()
-    {
-    }
-
     public override object Part1() => "";
 
     public override object Part2() => "";

AOC2016/Day22.cs

@@ -5,10 +5,6 @@ namespace AOC2016;
 /// </summary>
 public sealed class Day22() : Day(2016, 22, "Puzzle Name")
 {
-    public override void ProcessInput()
-    {
-    }
-
     public override object Part1() => "";
 
     public override object Part2() => "";

AOC2016/Day23.cs

@@ -5,10 +5,6 @@ namespace AOC2016;
 /// </summary>
 public sealed class Day23() : Day(2016, 23, "Puzzle Name")
 {
-    public override void ProcessInput()
-    {
-    }
-
     public override object Part1() => "";
 
     public override object Part2() => "";

AOC2016/Day24.cs

@@ -5,10 +5,6 @@ namespace AOC2016;
 /// </summary>
 public sealed class Day24() : Day(2016, 24, "Puzzle Name")
 {
-    public override void ProcessInput()
-    {
-    }
-
     public override object Part1() => "";
 
     public override object Part2() => "";

AOC2016/Day25.cs

@@ -5,10 +5,6 @@ namespace AOC2016;
 /// </summary>
 public sealed class Day25() : Day(2016, 25, "Puzzle Name")
 {
-    public override void ProcessInput()
-    {
-    }
-
     public override object Part1() => "";
 
     public override object Part2() => "";

AOC2017/Day01.cs

@@ -5,10 +5,6 @@ namespace AOC2017;
 /// </summary>
 public sealed class Day01() : Day(2017, 1, "Puzzle Name")
 {
-    public override void ProcessInput()
-    {
-    }
-
     public override object Part1() => "";
 
     public override object Part2() => "";

AOC2017/Day02.cs

@@ -5,10 +5,6 @@ namespace AOC2017;
 /// </summary>
 public sealed class Day02() : Day(2017, 2, "Puzzle Name")
 {
-    public override void ProcessInput()
-    {
-    }
-
     public override object Part1() => "";
 
     public override object Part2() => "";

AOC2017/Day03.cs

@@ -5,10 +5,6 @@ namespace AOC2017;
 /// </summary>
 public sealed class Day03() : Day(2017, 3, "Puzzle Name")
 {
-    public override void ProcessInput()
-    {
-    }
-
     public override object Part1() => "";
 
     public override object Part2() => "";

AOC2017/Day04.cs

@@ -5,10 +5,6 @@ namespace AOC2017;
 /// </summary>
 public sealed class Day04() : Day(2017, 4, "Puzzle Name")
 {
-    public override void ProcessInput()
-    {
-    }
-
     public override object Part1() => "";
 
     public override object Part2() => "";

AOC2017/Day05.cs

@@ -5,10 +5,6 @@ namespace AOC2017;
 /// </summary>
 public sealed class Day05() : Day(2017, 5, "Puzzle Name")
 {
-    public override void ProcessInput()
-    {
-    }
-
     public override object Part1() => "";
 
     public override object Part2() => "";

AOC2017/Day06.cs

@@ -5,10 +5,6 @@ namespace AOC2017;
 /// </summary>
 public sealed class Day06() : Day(2017, 6, "Puzzle Name")
 {
-    public override void ProcessInput()
-    {
-    }
-
     public override object Part1() => "";
 
     public override object Part2() => "";

AOC2017/Day07.cs

@@ -5,10 +5,6 @@ namespace AOC2017;
 /// </summary>
 public sealed class Day07() : Day(2017, 7, "Puzzle Name")
 {
-    public override void ProcessInput()
-    {
-    }
-
     public override object Part1() => "";
 
     public override object Part2() => "";

AOC2017/Day08.cs

@@ -5,10 +5,6 @@ namespace AOC2017;
 /// </summary>
 public sealed class Day08() : Day(2017, 8, "Puzzle Name")
 {
-    public override void ProcessInput()
-    {
-    }
-
     public override object Part1() => "";
 
     public override object Part2() => "";

AOC2017/Day09.cs

@@ -5,10 +5,6 @@ namespace AOC2017;
 /// </summary>
 public sealed class Day09() : Day(2017, 9, "Puzzle Name")
 {
-    public override void ProcessInput()
-    {
-    }
-
     public override object Part1() => "";
 
     public override object Part2() => "";

AOC2017/Day10.cs

@@ -5,10 +5,6 @@ namespace AOC2017;
 /// </summary>
 public sealed class Day10() : Day(2017, 10, "Puzzle Name")
 {
-    public override void ProcessInput()
-    {
-    }
-
     public override object Part1() => "";
 
     public override object Part2() => "";

AOC2017/Day11.cs

@@ -5,10 +5,6 @@ namespace AOC2017;
 /// </summary>
 public sealed class Day11() : Day(2017, 11, "Puzzle Name")
 {
-    public override void ProcessInput()
-    {
-    }
-
     public override object Part1() => "";
 
     public override object Part2() => "";

AOC2017/Day12.cs

@@ -5,10 +5,6 @@ namespace AOC2017;
 /// </summary>
 public sealed class Day12() : Day(2017, 12, "Puzzle Name")
 {
-    public override void ProcessInput()
-    {
-    }
-
     public override object Part1() => "";
 
     public override object Part2() => "";

AOC2017/Day13.cs

@@ -5,10 +5,6 @@ namespace AOC2017;
 /// </summary>
 public sealed class Day13() : Day(2017, 13, "Puzzle Name")
 {
-    public override void ProcessInput()
-    {
-    }
-
     public override object Part1() => "";
 
     public override object Part2() => "";

AOC2017/Day14.cs

@@ -5,10 +5,6 @@ namespace AOC2017;
 /// </summary>
 public sealed class Day14() : Day(2017, 14, "Puzzle Name")
 {
-    public override void ProcessInput()
-    {
-    }
-
     public override object Part1() => "";
 
     public override object Part2() => "";

AOC2017/Day15.cs

@@ -5,10 +5,6 @@ namespace AOC2017;
 /// </summary>
 public sealed class Day15() : Day(2017, 15, "Puzzle Name")
 {
-    public override void ProcessInput()
-    {
-    }
-
     public override object Part1() => "";
 
     public override object Part2() => "";

AOC2017/Day16.cs

@@ -5,10 +5,6 @@ namespace AOC2017;
 /// </summary>
 public sealed class Day16() : Day(2017, 16, "Puzzle Name")
 {
-    public override void ProcessInput()
-    {
-    }
-
     public override object Part1() => "";
 
     public override object Part2() => "";

AOC2017/Day17.cs

@@ -5,10 +5,6 @@ namespace AOC2017;
 /// </summary>
 public sealed class Day17() : Day(2017, 17, "Puzzle Name")
 {
-    public override void ProcessInput()
-    {
-    }
-
     public override object Part1() => "";
 
     public override object Part2() => "";

AOC2017/Day18.cs

@@ -5,10 +5,6 @@ namespace AOC2017;
 /// </summary>
 public sealed class Day18() : Day(2017, 18, "Puzzle Name")
 {
-    public override void ProcessInput()
-    {
-    }
-
     public override object Part1() => "";
 
     public override object Part2() => "";

AOC2017/Day19.cs

@@ -5,10 +5,6 @@ namespace AOC2017;
 /// </summary>
 public sealed class Day19() : Day(2017, 19, "Puzzle Name")
 {
-    public override void ProcessInput()
-    {
-    }
-
     public override object Part1() => "";
 
     public override object Part2() => "";

AOC2017/Day20.cs

@@ -5,10 +5,6 @@ namespace AOC2017;
 /// </summary>
 public sealed class Day20() : Day(2017, 20, "Puzzle Name")
 {
-    public override void ProcessInput()
-    {
-    }
-
     public override object Part1() => "";
 
     public override object Part2() => "";

AOC2017/Day21.cs

@@ -5,10 +5,6 @@ namespace AOC2017;
 /// </summary>
 public sealed class Day21() : Day(2017, 21, "Puzzle Name")
 {
-    public override void ProcessInput()
-    {
-    }
-
     public override object Part1() => "";
 
     public override object Part2() => "";

AOC2017/Day22.cs

@@ -5,10 +5,6 @@ namespace AOC2017;
 /// </summary>
 public sealed class Day22() : Day(2017, 22, "Puzzle Name")
 {
-    public override void ProcessInput()
-    {
-    }
-
     public override object Part1() => "";
 
     public override object Part2() => "";

AOC2017/Day23.cs

@@ -5,10 +5,6 @@ namespace AOC2017;
 /// </summary>
 public sealed class Day23() : Day(2017, 23, "Puzzle Name")
 {
-    public override void ProcessInput()
-    {
-    }
-
     public override object Part1() => "";
 
     public override object Part2() => "";

AOC2017/Day24.cs

@@ -5,11 +5,7 @@ namespace AOC2017;
 /// </summary>
 public sealed class Day24() : Day(2017, 24, "Puzzle Name")
 {
-    public override void ProcessInput()
-    {
-    }
-
-    public override object Part1() => "";
+        public override object Part1() => "";
 
     public override object Part2() => "";
 }

AOC2017/Day25.cs

@@ -5,10 +5,6 @@ namespace AOC2017;
 /// </summary>
 public sealed class Day25() : Day(2017, 25, "Puzzle Name")
 {
-    public override void ProcessInput()
-    {
-    }
-
     public override object Part1() => "";
 
     public override object Part2() => "";

AOC2018/Day01.cs

@@ -5,10 +5,6 @@ namespace AOC2018;
 /// </summary>
 public sealed class Day01() : Day(2018, 1, "Chronal Calibration")
 {
-    public override void ProcessInput()
-    {
-    }
-
     public override object Part1() => Input.Select(int.Parse).Sum();
 
     public override object Part2()

AOC2018/Day02.cs

@@ -5,10 +5,6 @@ namespace AOC2018;
 /// </summary>
 public sealed class Day02() : Day(2018, 2, "Inventory Management System")
 {
-    public override void ProcessInput()
-    {
-    }
-
     private static bool HasNChars(string line, int count)
     {
         for (var i = 'a'; i <= 'z'; i++)
@@ -31,4 +27,4 @@ public sealed class Day02() : Day(2018, 2, "Inventory Management System")
 
         throw new("Correct IDs not found");
     }
-}
+}

AOC2018/Day04.cs

@@ -5,10 +5,6 @@ namespace AOC2018;
 /// </summary>
 public sealed class Day04() : Day(2018, 4, "Puzzle Name")
 {
-    public override void ProcessInput()
-    {
-    }
-
     public override object Part1() => "";
 
     public override object Part2() => "";

AOC2018/Day05.cs

@@ -5,10 +5,6 @@ namespace AOC2018;
 /// </summary>
 public sealed class Day05() : Day(2018, 5, "Puzzle Name")
 {
-    public override void ProcessInput()
-    {
-    }
-
     public override object Part1() => "";
 
     public override object Part2() => "";

AOC2018/Day06.cs

@@ -5,11 +5,7 @@ namespace AOC2018;
 /// </summary>
 public sealed class Day06() : Day(2018, 6, "Puzzle Name")
 {
-    public override void ProcessInput()
-    {
-    }
-
-    public override object Part1() => "";
+        public override object Part1() => "";
 
     public override object Part2() => "";
 }

AOC2018/Day07.cs

@@ -5,10 +5,6 @@ namespace AOC2018;
 /// </summary>
 public sealed class Day07() : Day(2018, 7, "Puzzle Name")
 {
-    public override void ProcessInput()
-    {
-    }
-
     public override object Part1() => "";
 
     public override object Part2() => "";

AOC2018/Day08.cs

@@ -5,10 +5,6 @@ namespace AOC2018;
 /// </summary>
 public sealed class Day08() : Day(2018, 8, "Puzzle Name")
 {
-    public override void ProcessInput()
-    {
-    }
-
     public override object Part1() => "";
 
     public override object Part2() => "";

AOC2018/Day09.cs

@@ -5,10 +5,6 @@ namespace AOC2018;
 /// </summary>
 public sealed class Day09() : Day(2018, 9, "Puzzle Name")
 {
-    public override void ProcessInput()
-    {
-    }
-
     public override object Part1() => "";
 
     public override object Part2() => "";

AOC2018/Day10.cs

@@ -5,10 +5,6 @@ namespace AOC2018;
 /// </summary>
 public sealed class Day10() : Day(2018, 10, "Puzzle Name")
 {
-    public override void ProcessInput()
-    {
-    }
-
     public override object Part1() => "";
 
     public override object Part2() => "";

AOC2018/Day11.cs

@@ -5,11 +5,7 @@ namespace AOC2018;
 /// </summary>
 public sealed class Day11() : Day(2018, 11, "Puzzle Name")
 {
-    public override void ProcessInput()
-    {
-    }
-
-    public override object Part1() => "";
+        public override object Part1() => "";
 
     public override object Part2() => "";
 }

AOC2018/Day12.cs

@@ -5,10 +5,6 @@ namespace AOC2018;
 /// </summary>
 public sealed class Day12() : Day(2018, 12, "Puzzle Name")
 {
-    public override void ProcessInput()
-    {
-    }
-
     public override object Part1() => "";
 
     public override object Part2() => "";

AOC2018/Day13.cs

@@ -5,10 +5,6 @@ namespace AOC2018;
 /// </summary>
 public sealed class Day13() : Day(2018, 13, "Puzzle Name")
 {
-    public override void ProcessInput()
-    {
-    }
-
     public override object Part1() => "";
 
     public override object Part2() => "";

AOC2018/Day14.cs

@@ -5,10 +5,6 @@ namespace AOC2018;
 /// </summary>
 public sealed class Day14() : Day(2018, 14, "Puzzle Name")
 {
-    public override void ProcessInput()
-    {
-    }
-
     public override object Part1() => "";
 
     public override object Part2() => "";

AOC2018/Day15.cs

@@ -5,10 +5,6 @@ namespace AOC2018;
 /// </summary>
 public sealed class Day15() : Day(2018, 15, "Puzzle Name")
 {
-    public override void ProcessInput()
-    {
-    }
-
     public override object Part1() => "";
 
     public override object Part2() => "";

AOC2018/Day16.cs

@@ -5,10 +5,6 @@ namespace AOC2018;
 /// </summary>
 public sealed class Day16() : Day(2018, 16, "Puzzle Name")
 {
-    public override void ProcessInput()
-    {
-    }
-
     public override object Part1() => "";
 
     public override object Part2() => "";

AOC2018/Day17.cs

@@ -5,10 +5,6 @@ namespace AOC2018;
 /// </summary>
 public sealed class Day17() : Day(2018, 17, "Puzzle Name")
 {
-    public override void ProcessInput()
-    {
-    }
-
     public override object Part1() => "";
 
     public override object Part2() => "";

AOC2018/Day18.cs

@@ -5,10 +5,6 @@ namespace AOC2018;
 /// </summary>
 public sealed class Day18() : Day(2018, 18, "Puzzle Name")
 {
-    public override void ProcessInput()
-    {
-    }
-
     public override object Part1() => "";
 
     public override object Part2() => "";

AOC2018/Day19.cs

@@ -5,10 +5,6 @@ namespace AOC2018;
 /// </summary>
 public sealed class Day19() : Day(2018, 19, "Puzzle Name")
 {
-    public override void ProcessInput()
-    {
-    }
-
     public override object Part1() => "";
 
     public override object Part2() => "";

AOC2018/Day20.cs

@@ -5,10 +5,6 @@ namespace AOC2018;
 /// </summary>
 public sealed class Day20() : Day(2018, 20, "Puzzle Name")
 {
-    public override void ProcessInput()
-    {
-    }
-
     public override object Part1() => "";
 
     public override object Part2() => "";

AOC2018/Day21.cs

@@ -5,11 +5,7 @@ namespace AOC2018;
 /// </summary>
 public sealed class Day21() : Day(2018, 21, "Puzzle Name")
 {
-    public override void ProcessInput()
-    {
-    }
-
-    public override object Part1() => "";
+        public override object Part1() => "";
 
     public override object Part2() => "";
 }

AOC2018/Day22.cs

@@ -5,10 +5,6 @@ namespace AOC2018;
 /// </summary>
 public sealed class Day22() : Day(2018, 22, "Puzzle Name")
 {
-    public override void ProcessInput()
-    {
-    }
-
     public override object Part1() => "";
 
     public override object Part2() => "";

AOC2018/Day23.cs

@@ -5,10 +5,6 @@ namespace AOC2018;
 /// </summary>
 public sealed class Day23() : Day(2018, 23, "Puzzle Name")
 {
-    public override void ProcessInput()
-    {
-    }
-
     public override object Part1() => "";
 
     public override object Part2() => "";

AOC2018/Day24.cs

@@ -5,10 +5,6 @@ namespace AOC2018;
 /// </summary>
 public sealed class Day24() : Day(2018, 24, "Puzzle Name")
 {
-    public override void ProcessInput()
-    {
-    }
-
     public override object Part1() => "";
 
     public override object Part2() => "";

AOC2018/Day25.cs

@@ -5,10 +5,6 @@ namespace AOC2018;
 /// </summary>
 public sealed class Day25() : Day(2018, 25, "Puzzle Name")
 {
-    public override void ProcessInput()
-    {
-    }
-
     public override object Part1() => "";
 
     public override object Part2() => "";

AOC2019/Day18.cs

@@ -2,10 +2,6 @@ namespace AOC2019;
 
 public sealed class Day18() : Day(2019, 18, "Many-Worlds Interpretation")
 {
-    public override void ProcessInput()
-    {
-    }
-
     public override object Part1() => "";
 
     public override object Part2() => "";

AOC2019/Day20.cs

@@ -2,10 +2,6 @@ namespace AOC2019;
 
 public sealed class Day20() : Day(2019, 20, "Donut Maze")
 {
-    public override void ProcessInput()
-    {
-    }
-
     public override object Part1() => "";
 
     public override object Part2() => "";

AOC2019/Day21.cs

@@ -1,22 +1,8 @@
 namespace AOC2019;
 
-public sealed class Day21 : Day
+public sealed class Day21() : Day(2019, 21, "Springdroid Adventure")
 {
-    private readonly IntCodeVM _vm;
-
-    public Day21() : base(2019, 21, "Springdroid Adventure") =>
-        _vm = new(Input.First());
-
-    public override void ProcessInput()
-    {
-    }
-
-    public override object Part1()
-    {
-        _vm.Reset();
-        var halt = _vm.Run();
-        return "";
-    }
+    public override object Part1() => "";
 
     public override object Part2() => "";
 }

AOC2019/Day22.cs

@@ -2,10 +2,6 @@ namespace AOC2019;
 
 public sealed class Day22() : Day(2019, 22, "Slam Shuffle")
 {
-    public override void ProcessInput()
-    {
-    }
-
     public override object Part1() => "";
 
     public override object Part2() => "";

AOC2019/Day23.cs

@@ -2,10 +2,6 @@ namespace AOC2019;
 
 public sealed class Day23() : Day(2019, 23, "Category Six")
 {
-    public override void ProcessInput()
-    {
-    }
-
     public override object Part1()
     {
         var vms = Enumerable.Range(0, 50)

AOC2019/Day24.cs

@@ -2,10 +2,6 @@ namespace AOC2019;
 
 public sealed class Day24() : Day(2019, 24, "Planet of Discord")
 {
-    public override void ProcessInput()
-    {
-    }
-
     public override object Part1() => "";
 
     public override object Part2() => "";

AOC2019/Day25.cs

@@ -2,10 +2,6 @@ namespace AOC2019;
 
 public sealed class Day25() : Day(2019, 25, "Cryostasis")
 {
-    public override void ProcessInput()
-    {
-    }
-
     public override object Part1() => "";
 
     public override object Part2() => "";

AOC2020/Day11.cs

@@ -5,10 +5,6 @@ namespace AOC2020;
 /// </summary>
 public sealed class Day11() : Day(2020, 11, "Seating System")
 {
-    public override void ProcessInput()
-    {
-    }
-
     public override object Part1()
     {
         var prev = new LifeGame(Input);
@@ -73,13 +69,13 @@ public sealed class Day11() : Day(2020, 11, "Seating System")
         {
             var next = new LifeGame { _h = _h, _w = _w, Grid = Grid.Select(s => s.ToArray()).ToArray() };
             for (var y = 0; y < _h; y++)
-                for (var x = 0; x < _w; x++)
-                    next.Grid[y][x] = Grid[y][x] switch
-                    {
-                        'L' when CountAdjacent(y, x) == 0 => '#',
-                        '#' when CountAdjacent(y, x) >= 4 => 'L',
-                        _ => Grid[y][x]
-                    };
+            for (var x = 0; x < _w; x++)
+                next.Grid[y][x] = Grid[y][x] switch
+                {
+                    'L' when CountAdjacent(y, x) == 0 => '#',
+                    '#' when CountAdjacent(y, x) >= 4 => 'L',
+                    _ => Grid[y][x]
+                };
 
             // next.PrintBoard();
             return next;
@@ -91,8 +87,7 @@ public sealed class Day11() : Day(2020, 11, "Seating System")
         private int CountAdjacent(int y, int x) =>
             new[]
             {
-                At(y - 1, x - 1), At(y - 1, x + 0), At(y - 1, x + 1),
-                At(y + 0, x - 1), At(y + 0, x + 1),
+                At(y - 1, x - 1), At(y - 1, x + 0), At(y - 1, x + 1), At(y + 0, x - 1), At(y + 0, x + 1),
                 At(y + 1, x - 1), At(y + 1, x + 0), At(y + 1, x + 1)
             }.Count(c => c == '#');
 
@@ -100,13 +95,13 @@ public sealed class Day11() : Day(2020, 11, "Seating System")
         {
             var next = new LifeGame { _h = _h, _w = _w, Grid = Grid.Select(s => s.ToArray()).ToArray() };
             for (var y = 0; y < _h; y++)
-                for (var x = 0; x < _w; x++)
-                    next.Grid[y][x] = Grid[y][x] switch
-                    {
-                        'L' when CanSee(y, x) == 0 => '#',
-                        '#' when CanSee(y, x) >= 5 => 'L',
-                        _ => Grid[y][x]
-                    };
+            for (var x = 0; x < _w; x++)
+                next.Grid[y][x] = Grid[y][x] switch
+                {
+                    'L' when CanSee(y, x) == 0 => '#',
+                    '#' when CanSee(y, x) >= 5 => 'L',
+                    _ => Grid[y][x]
+                };
 
             // next.PrintBoard();
             return next;
@@ -115,9 +110,8 @@ public sealed class Day11() : Day(2020, 11, "Seating System")
         private int CanSee(int y, int x) =>
             new[]
             {
-                TraceRay(y, x, -1, -1), TraceRay(y, x, -1, +0), TraceRay(y, x, -1, +1),
-                TraceRay(y, x, +0, -1), TraceRay(y, x, +0, +1),
-                TraceRay(y, x, +1, -1), TraceRay(y, x, +1, +0), TraceRay(y, x, +1, +1)
+                TraceRay(y, x, -1, -1), TraceRay(y, x, -1, +0), TraceRay(y, x, -1, +1), TraceRay(y, x, +0, -1),
+                TraceRay(y, x, +0, +1), TraceRay(y, x, +1, -1), TraceRay(y, x, +1, +0), TraceRay(y, x, +1, +1)
             }.Count(c => c == '#');
 
         private char TraceRay(int y, int x, int dy, int dx)

AOC2020/Day12.cs

@@ -5,10 +5,6 @@ namespace AOC2020;
 /// </summary>
 public sealed class Day12() : Day(2020, 12, "Rain Risk")
 {
-    public override void ProcessInput()
-    {
-    }
-
     private static void Swap(ref int x, ref int y) => (y, x) = (x, y);
 
     private (int x, int y, int sx, int sy) ProcessInstructions()

AOC2020/Day14.cs

@@ -5,10 +5,6 @@ namespace AOC2020;
 /// </summary>
 public sealed class Day14() : Day(2020, 14, "Docking Data")
 {
-    public override void ProcessInput()
-    {
-    }
-
     private static readonly char[] SquareBrackets = ['[', ']'];
     private static readonly char[] BracketsAndEquals = [.. SquareBrackets, '='];
 

AOC2020/Day20.cs

@@ -8,10 +8,6 @@ public sealed partial class Day20() : Day(2020, 20, "Jurassic Jigsaw")
     [GeneratedRegex("(?<=#.{77})#.{4}#{2}.{4}#{2}.{4}#{3}(?=.{77}#.{2}#.{2}#.{2}#.{2}#.{2}#)")]
     private static partial Regex MonsterRegex();
 
-    public override void ProcessInput()
-    {
-    }
-
     public override object Part1()
     {
         var puzzlePieces = ParsePiecesFromInput(Input.ToArray());

AOC2020/Day25.cs

@@ -5,10 +5,6 @@ namespace AOC2020;
 /// </summary>
 public sealed class Day25() : Day(2020, 25, "Combo Breaker")
 {
-    public override void ProcessInput()
-    {
-    }
-
     private static long Transform(long subject, int loopSize)
     {
         var value = 1L;

AOC2021/Day02.cs

@@ -5,10 +5,6 @@ namespace AOC2021;
 /// </summary>
 public sealed class Day02() : Day(2021, 2, "Dive!")
 {
-    public override void ProcessInput()
-    {
-    }
-
     public override object Part1()
     {
         int horiz = 0, depth = 0;

AOC2021/Day05.cs

@@ -5,10 +5,6 @@ namespace AOC2021;
 /// </summary>
 public sealed partial class Day05() : Day(2021, 5, "Hydrothermal Venture")
 {
-    public override void ProcessInput()
-    {
-    }
-
     private int Solve(bool diagonals = false) =>
         Input
             .Select(s => NonDigits().Split(s).Select(int.Parse).ToList())

AOC2021/Day08.cs

@@ -9,10 +9,6 @@ public sealed class Day08() : Day(2021, 8, "Seven Segment Search")
         "abcdefg".ToCharArray().Permute().Select(m => m.ToArray()).ToList();
     private static readonly int[] SearchValues = { 2, 3, 4, 7 };
 
-    public override void ProcessInput()
-    {
-    }
-
     private static int MatchDigit(string lit) =>
         lit switch
         {

AOC2022/Day03.cs

@@ -5,10 +5,6 @@ namespace AOC2022;
 /// </summary>
 public sealed class Day03() : Day(2022, 3, "Rucksack Reorganization")
 {
-    public override void ProcessInput()
-    {
-    }
-
     public override object Part1() =>
         Input.Sum(rucksack => RankItem(rucksack.Chunk(rucksack.Length / 2).Aggregate<IEnumerable<char>>((a, b) => a.Intersect(b)).Single()));
 
@@ -16,4 +12,4 @@ public sealed class Day03() : Day(2022, 3, "Rucksack Reorganization")
         Input.Chunk(3).Sum(group => RankItem(group.Aggregate<IEnumerable<char>>((a, b) => a.Intersect(b)).Single()));
 
     private static int RankItem(char item) => item - (char.IsUpper(item) ? '&' : '`');
-}
+}

AOC2022/Day16.cs

@@ -5,10 +5,6 @@ namespace AOC2022;
 /// </summary>
 public sealed class Day16() : Day(2022, 16, "Proboscidea Volcanium")
 {
-    public override void ProcessInput()
-    {
-    }
-
     public override object Part1() => "";
 
     public override object Part2() => "";

AOC2022/Day17.cs

@@ -5,10 +5,6 @@ namespace AOC2022;
 /// </summary>
 public sealed class Day17() : Day(2022, 17, "Pyroclastic Flow")
 {
-    public override void ProcessInput()
-    {
-    }
-
     public override object Part1() => "";
 
     public override object Part2() => "";

AOC2022/Day18.cs

@@ -5,10 +5,6 @@ namespace AOC2022;
 /// </summary>
 public sealed class Day18() : Day(2022, 18, "Boiling Boulders")
 {
-    public override void ProcessInput()
-    {
-    }
-
     public override object Part1() => "";
 
     public override object Part2() => "";