2016 day 8

AOC.Test/Test2016.cs

@@ -5,6 +5,18 @@ namespace AOC.Test;
 [TestClass]
 public class Test2016
 {
+    private const string Day08Actual =
+        """
+        
+        ███▒▒█▒▒█▒███▒▒█▒▒█▒▒██▒▒████▒▒██▒▒████▒▒███▒█▒▒▒▒
+        █▒▒█▒█▒▒█▒█▒▒█▒█▒▒█▒█▒▒█▒█▒▒▒▒█▒▒█▒█▒▒▒▒▒▒█▒▒█▒▒▒▒
+        █▒▒█▒█▒▒█▒█▒▒█▒█▒▒█▒█▒▒▒▒███▒▒█▒▒█▒███▒▒▒▒█▒▒█▒▒▒▒
+        ███▒▒█▒▒█▒███▒▒█▒▒█▒█▒▒▒▒█▒▒▒▒█▒▒█▒█▒▒▒▒▒▒█▒▒█▒▒▒▒
+        █▒█▒▒█▒▒█▒█▒█▒▒█▒▒█▒█▒▒█▒█▒▒▒▒█▒▒█▒█▒▒▒▒▒▒█▒▒█▒▒▒▒
+        █▒▒█▒▒██▒▒█▒▒█▒▒██▒▒▒██▒▒████▒▒██▒▒████▒▒███▒████▒
+        
+        """;
+    
     [DataTestMethod]
     [DataRow(typeof(Day01), "300", "159")]
     [DataRow(typeof(Day02), "76792", "A7AC3")]
@@ -13,6 +25,7 @@ public class Test2016
     //[DataRow(typeof(Day05), "F77A0E6E", "999828EC")] // TODO: optimize
     [DataRow(typeof(Day06), "gyvwpxaz", "jucfoary")]
     [DataRow(typeof(Day07), "105", "258")]
+    [DataRow(typeof(Day08), "121", Day08Actual)]
     public void CheckAllDays(Type dayType, string part1, string part2) =>
         Common.CheckDay(dayType, part1, part2);
 

AOC2016/Day08.cs

@@ -3,13 +3,100 @@ namespace AOC2016;
 /// <summary>
 /// Day 8: <a href="https://adventofcode.com/2016/day/8"/>
 /// </summary>
-public sealed class Day08() : Day(2016, 8, "Puzzle Name")
+public sealed class Day08() : Day(2016, 8, "Two-Factor Authentication")
 {
     public override void ProcessInput()
     {
     }
 
-    public override object Part1() => "";
+    private static string PrintGrid(char[,] screen)
+    {
+        var sb = new StringBuilder();
+        for (var y = 0; y <= screen.GetUpperBound(0); y++)
+        {
+            for (var x = 0; x <= screen.GetUpperBound(1); x++)
+                sb.Append(screen[y, x]);
 
-    public override object Part2() => "";
-}
+            sb.AppendLine();
+        }
+
+        return sb.ToString();
+    }
+
+    private static void DrawRectangle(char[,] screen, int width, int height)
+    {
+        foreach (var y in Enumerable.Range(0, height))
+        foreach (var x in Enumerable.Range(0, width))
+            screen[y, x] = '\u2588';
+    }
+
+    private static void Coltate(char[,] screen, int index, int extent)
+    {
+        for (var count = 0; count < extent; count++)
+        {
+            var tmp = screen[screen.GetUpperBound(0), index];
+            for (var i = screen.GetUpperBound(0); i > 0; i--)
+            {
+                screen[i, index] = screen[i - 1, index];
+            }
+
+            screen[0, index] = tmp;
+        }
+    }
+
+    private static void Rowtate(char[,] screen, int index, int extent)
+    {
+        for (var count = 0; count < extent; count++)
+        {
+            var tmp = screen[index, screen.GetUpperBound(1)];
+            for (var i = screen.GetUpperBound(1); i > 0; i--)
+            {
+                screen[index, i] = screen[index, i - 1];
+            }
+
+            screen[index, 0] = tmp;
+        }
+    }
+
+    public override object Part1()
+    {
+        return Input.Where(line => line.StartsWith("rect")).Sum(rect =>
+        {
+            var s = rect.Split('x', ' ').Skip(1).Select(int.Parse).ToList();
+            return s[0] * s[1];
+        });
+    }
+
+    public override object Part2()
+    {
+        var screen = new char[6, 50];
+        for (var y = 0; y < 6; y++)
+        for (var x = 0; x < 50; x++)
+            screen[y, x] = '\u2592';
+
+        foreach (var line in Input)
+        {
+            var s = line.Split(' ', StringSplitOptions.TrimEntries | StringSplitOptions.RemoveEmptyEntries);
+            switch (s[0])
+            {
+                case "rect":
+                    var a = s[1].Split('x');
+                    DrawRectangle(screen, int.Parse(a[0]), int.Parse(a[1]));
+                    break;
+                case "rotate":
+                    var index = int.Parse(s[2][2..]);
+                    var extent = int.Parse(s[4]);
+
+                    if (s[1] == "column")
+                        Coltate(screen, index, extent);
+                    else
+                        Rowtate(screen, index, extent);
+
+                    break;
+            }
+            // Console.WriteLine(PrintGrid(screen));
+        }
+
+        return Environment.NewLine + PrintGrid(screen);
+    }
+}