feat: initial project setup for day 3

03/MullItOver/MullItOver.csproj

@@ -0,0 +1,21 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net9.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+    <NoWarn>CA1822</NoWarn>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <InternalsVisibleTo Include="$(AssemblyName).Tests" />
+  </ItemGroup>
+    
+  <ItemGroup>
+    <Content Include="..\INPUT.txt">
+      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
+    </Content>
+  </ItemGroup>
+
+</Project>

03/MullItOver/Program.cs

@@ -0,0 +1,38 @@
+using System.Diagnostics;
+
+if (args.Length is 0)
+{
+  Console.WriteLine("Please provide a path to the input file.");
+  return;
+}
+
+if (File.Exists(args[0]) is false)
+{
+  Console.WriteLine("The provided file does not exist.");
+  return;
+}
+
+var isPart2 = args.Length is 2 && args[1] is "part2";
+var input = await File.ReadAllTextAsync(args[0]);
+
+var stopwatch = new Stopwatch();
+stopwatch.Start();
+
+var instructions = new PuzzleParser().Parse(input);
+
+var results = 0;
+
+stopwatch.Stop();
+Console.WriteLine($"The sum of instructions is {results}. ({stopwatch.ElapsedMilliseconds}ms)");
+
+class PuzzleParser
+{
+  public List<Instruction> Parse(string input)
+  {
+    return [];
+  }
+}
+
+class Instruction(int multiplicandOne, int multiplicandTwo)
+{
+}