Day 2

AdventOfCode/AdventOfCode.csproj

@@ -9,12 +9,20 @@
 
   <ItemGroup>
     <None Remove="Problems\AOC2022\Day1\input.txt" />
+    <None Remove="Problems\AOC2022\Day2\input.txt" />
+    <None Remove="Problems\AOC2022\Day2\test.txt" />
   </ItemGroup>
 
   <ItemGroup>
     <EmbeddedResource Include="Problems\AOC2022\Day1\input.txt">
       <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
     </EmbeddedResource>
+    <EmbeddedResource Include="Problems\AOC2022\Day2\input.txt">
+      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
+    </EmbeddedResource>
+    <EmbeddedResource Include="Problems\AOC2022\Day2\test.txt">
+      <CopyToOutputDirectory>Always</CopyToOutputDirectory>
+    </EmbeddedResource>
   </ItemGroup>
 
 </Project>

AdventOfCode/Problems/AOC2022/Day2/RockPaperScissors.cs

@@ -0,0 +1,113 @@
+using AdventOfCode.Runner;
+using AdventOfCode.Runner.Attributes;
+
+namespace AdventOfCode.Problems.AOC2022.Day2;
+
+[ProblemInfo("2022", 2, "Rock Paper Scissors")]
+internal class RockPaperScissors : IProblem
+{
+	private string[] _lines;
+	private int _part1Score;
+	private int _part2Score;
+
+	public RockPaperScissors()
+	{
+		_lines = Array.Empty<string>();
+	}
+
+	public void LoadInput()
+	{
+		_lines = File.ReadAllLines("Problems/AOC2022/Day2/input.txt");
+	}
+
+	public void CalculatePart1()
+	{
+		var totalScore = 0;
+		foreach (var line in _lines)
+		{
+			var move = line[0];
+			var response = line[^1];
+
+			totalScore += GetMoveValue(response);
+			totalScore += GetResult(move, response);
+		}
+		_part1Score = totalScore;
+	}
+
+	private static int GetMoveValue(char move)
+	{
+		return move switch
+		{
+			'A' => 1,
+			'B' => 2,
+			'C' => 3,
+			'X' => 1,
+			'Y' => 2,
+			'Z' => 3,
+			_ => 0,
+		};
+	}
+
+	private static int GetResult(char move, char response)
+	{
+		return (move, response) switch
+		{
+			('A', 'X') => 3,
+			('B', 'X') => 0,
+			('C', 'X') => 6,
+			('A', 'Y') => 6,
+			('B', 'Y') => 3,
+			('C', 'Y') => 0,
+			('A', 'Z') => 0,
+			('B', 'Z') => 6,
+			('C', 'Z') => 3,
+			_ => 0,
+		};
+	}
+
+	private static int GetResultValue(char result)
+	{
+		return result switch
+		{
+			'X' => 0,
+			'Y' => 3,
+			'Z' => 6,
+			_ => 0,
+		};
+	}
+
+	private static int GetResponseValue(char move, char result) {
+		var p = result switch
+		{
+			'X' => (GetMoveValue(move) + 2) % 3, //Lose
+			'Y' => GetMoveValue(move), //Tie
+			'Z' => (GetMoveValue(move) + 1) % 3, //Win
+			_ => 0
+		};
+		return p == 0 ? 3 : p;
+	}
+
+	
+	public void CalculatePart2()
+	{
+		var score = 0;
+		foreach (var line in _lines)
+		{
+			var move = line[0];
+			var result = line[^1];
+			score += GetResponseValue(move, result);
+			score += GetResultValue(result);
+		}
+		_part2Score = score;
+	}
+
+	public void PrintPart1()
+	{
+		Console.WriteLine($"P1: {_part1Score}");
+	}
+
+	public void PrintPart2()
+	{
+		Console.WriteLine($"P2: {_part2Score}");
+	}
+}

AdventOfCode/Problems/AOC2022/Day2/test.txt

@@ -0,0 +1,3 @@
+A Y
+B X
+C Z

AdventOfCode/Program.cs

@@ -1,4 +1,5 @@
 using AdventOfCode.Problems.AOC2022.Day1;
+using AdventOfCode.Problems.AOC2022.Day2;
 using AdventOfCode.Runner;
 
 namespace AdventOfCode;
@@ -9,7 +10,7 @@ internal class Program
 	{
 		var runner = new AOCRunner();
 		runner.RenderMenu();
-		var cc = new CalorieCounting();
+		var cc = new RockPaperScissors();
 		cc.LoadInput();
 		cc.CalculatePart1();
 		cc.PrintPart1();