Add Day 9

.vscode/launch.json

@@ -10,7 +10,7 @@
             "request": "launch",
             "preLaunchTask": "dotnet: build aoc-2024-01",
             "program": "${workspaceFolder}/artifacts/bin/aoc-2024-01/debug/aoc-2024-01.dll",
-            "args": ["part-one", "data/2024/01/input.txt"],
+            "args": ["part-one", "test-results/2024/01/input.txt"],
             "cwd": "${workspaceFolder}",
             "stopAtEntry": false,
             "console": "internalConsole"
@@ -21,7 +21,7 @@
             "request": "launch",
             "preLaunchTask": "dotnet: build aoc-2024-02",
             "program": "${workspaceFolder}/artifacts/bin/aoc-2024-02/debug/aoc-2024-02.dll",
-            "args": ["part-two", "data/2024/02/dev.txt"],
+            "args": ["part-two", "test-results/2024/02/dev.txt"],
             "cwd": "${workspaceFolder}",
             "stopAtEntry": false,
             "console": "internalConsole"
@@ -32,7 +32,7 @@
             "request": "launch",
             "preLaunchTask": "dotnet: build aoc-2024-03",
             "program": "${workspaceFolder}/artifacts/bin/aoc-2024-03/debug/aoc-2024-03.dll",
-            "args": ["part-two", "data/2024/03/dev2.txt"],
+            "args": ["part-two", "test-results/2024/03/dev2.txt"],
             "cwd": "${workspaceFolder}",
             "stopAtEntry": false,
             "console": "internalConsole"
@@ -43,7 +43,7 @@
             "request": "launch",
             "preLaunchTask": "dotnet: build aoc-2024-04",
             "program": "${workspaceFolder}/artifacts/bin/aoc-2024-04/debug/aoc-2024-04.dll",
-            "args": ["part-one", "data/2024/04/dev.txt"],
+            "args": ["part-one", "test-results/2024/04/dev.txt"],
             "cwd": "${workspaceFolder}",
             "stopAtEntry": false,
             "console": "internalConsole"
@@ -54,7 +54,7 @@
             "request": "launch",
             "preLaunchTask": "dotnet: build aoc-2024-05",
             "program": "${workspaceFolder}/artifacts/bin/aoc-2024-05/debug/aoc-2024-05.dll",
-            "args": ["part-one", "data/2024/05/dev.txt"],
+            "args": ["part-one", "test-results/2024/05/dev.txt"],
             "cwd": "${workspaceFolder}",
             "stopAtEntry": false,
             "console": "internalConsole"
@@ -65,7 +65,7 @@
             "request": "launch",
             "preLaunchTask": "dotnet: build aoc-2024-06",
             "program": "${workspaceFolder}/artifacts/bin/aoc-2024-06/debug/aoc-2024-06.dll",
-            "args": ["part-two", "data/2024/06/dev.txt"],
+            "args": ["part-two", "test-results/2024/06/dev.txt"],
             "cwd": "${workspaceFolder}",
             "stopAtEntry": false,
             "console": "internalConsole"
@@ -76,7 +76,7 @@
             "request": "launch",
             "preLaunchTask": "dotnet: build aoc-2024-07",
             "program": "${workspaceFolder}/artifacts/bin/aoc-2024-07/debug/aoc-2024-07.dll",
-            "args": ["part-two", "data/2024/07/dev.txt"],
+            "args": ["part-two", "test-results/2024/07/dev.txt"],
             "cwd": "${workspaceFolder}",
             "stopAtEntry": false,
             "console": "internalConsole"
@@ -87,7 +87,18 @@
             "request": "launch",
             "preLaunchTask": "dotnet: build aoc-2024-08",
             "program": "${workspaceFolder}/artifacts/bin/aoc-2024-08/debug/aoc-2024-08.dll",
-            "args": ["part-one", "data/2024/08/dev.txt"],
+            "args": ["part-one", "test-results/2024/08/dev.txt"],
+            "cwd": "${workspaceFolder}",
+            "stopAtEntry": false,
+            "console": "internalConsole"
+        },
+        {
+            "name": "aoc-2024-09 Debug",
+            "type": "coreclr",
+            "request": "launch",
+            "preLaunchTask": "dotnet: build aoc-2024-09",
+            "program": "${workspaceFolder}/artifacts/bin/aoc-2024-09/debug/aoc-2024-09.dll",
+            "args": ["part-one", "test-results/2024/09/dev.txt"],
             "cwd": "${workspaceFolder}",
             "stopAtEntry": false,
             "console": "internalConsole"

.vscode/tasks.json

@@ -66,6 +66,14 @@
             "group": "build",
             "problemMatcher": [],
             "label": "dotnet: build aoc-2024-08"
+        },
+        {
+            "type": "dotnet",
+            "task": "build aoc-2024-09.csproj",
+            "file": "src/2024/09/aoc-2024-09.csproj",
+            "group": "build",
+            "problemMatcher": [],
+            "label": "dotnet: build aoc-2024-09"
         }
     ]
 }

AdventOfCode.sln

@@ -23,6 +23,8 @@ Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "aoc-2024-08", "src\2024\08\
 EndProject
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "core", "src\core\core.csproj", "{9E2BD5D6-55DD-4760-AD30-75B168F03F60}"
 EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "aoc-2024-09", "src\2024\09\aoc-2024-09.csproj", "{BFF5A025-BCA5-426C-AA21-237E1059AEA7}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
@@ -68,6 +70,10 @@ Global
 		{9E2BD5D6-55DD-4760-AD30-75B168F03F60}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{9E2BD5D6-55DD-4760-AD30-75B168F03F60}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{9E2BD5D6-55DD-4760-AD30-75B168F03F60}.Release|Any CPU.Build.0 = Release|Any CPU
+		{BFF5A025-BCA5-426C-AA21-237E1059AEA7}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{BFF5A025-BCA5-426C-AA21-237E1059AEA7}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{BFF5A025-BCA5-426C-AA21-237E1059AEA7}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{BFF5A025-BCA5-426C-AA21-237E1059AEA7}.Release|Any CPU.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(NestedProjects) = preSolution
 		{FAF70800-E2C3-4AD7-B433-86C1F20380F7} = {37CA8017-085A-4F6A-BADB-535F929C10B9}
@@ -78,5 +84,6 @@ Global
 		{EEC6EF36-EE16-4DB4-9AE8-CF0234751458} = {37CA8017-085A-4F6A-BADB-535F929C10B9}
 		{58941BB2-E4AC-40F0-AA92-BEF51DEFC859} = {37CA8017-085A-4F6A-BADB-535F929C10B9}
 		{44BBC1CF-D2FC-4906-9691-B439EC9EFB8C} = {37CA8017-085A-4F6A-BADB-535F929C10B9}
+		{BFF5A025-BCA5-426C-AA21-237E1059AEA7} = {37CA8017-085A-4F6A-BADB-535F929C10B9}
 	EndGlobalSection
 EndGlobal

src/2024/09/Program.cs

@@ -0,0 +1,93 @@
+using System.Collections;
+using System.Runtime.InteropServices;
+using System.Xml;
+
+using ConsoleAppFramework;
+
+using core;
+
+var builder = ConsoleApp.Create();
+builder.Add("part-one", static ([Argument, FileExists] string file) =>
+{
+	Console.WriteLine($"Result: {ReadFile(file, true)}");
+});
+builder.Add("part-two", static ([Argument, FileExists] string file) =>
+{
+	Console.WriteLine($"Result: {ReadFile(file, false)}");
+});
+builder.Run(args);
+
+static long ReadFile(string file, bool fragment)
+{
+	LinkedList<(int? Id, int Length)> linkedList = [];
+
+	int rolling = 0;
+	bool isFile = true;
+	using (var fileReader = new StreamReader(file))
+	{
+		while (fileReader.Read() is int c and not -1 && char.IsDigit((char)c))
+		{
+			linkedList.AddLast((((_, isFile) = ((int?)(isFile ? rolling++ : null), !isFile)).Item1, c - '0'));
+		}
+	}
+
+	for (var node = linkedList.Last; node is not null; node = node.Previous)
+	{
+		if (node.Value.Id is null)
+		{
+			continue;
+		}
+
+		ref var block = ref node.ValueRef;
+		var compact = block.Length;
+		for (var free = linkedList.First; free is not null && free != node; free = free.Next)
+		{
+			if (free.Value.Id is not null)
+			{
+				continue;
+			}
+
+			var move = fragment ? Math.Min(compact, free.Value.Length) : compact;
+			var remaining = free.Value.Length - move;
+			if (remaining < 0)
+			{
+				continue;
+			}
+
+			LinkedListNode<(int? Id, int Length)> moved = free;
+			if (remaining > 0)
+			{
+				moved = linkedList.AddBefore(free, (null, move));
+				free.ValueRef.Length = remaining;
+			}
+
+			moved.ValueRef.Id = block.Id;
+			remaining = compact - move;
+			if ((compact -= move) != 0)
+			{
+				linkedList.AddAfter(node, (null, remaining));
+				block.Length = compact;
+			}
+			else
+			{
+				block.Id = null;
+				break;
+			}
+		}
+	}
+
+	return linkedList.Aggregate((Result: 0L, Index: 0), (result, node) =>
+	{
+		var sum = result.Result;
+
+		if (node.Id is int id)
+		{
+			for (int i = 0; i < node.Length; i++)
+			{
+				sum = checked(sum + (result.Index + i) * id);
+			}
+		}
+
+		return (sum, result.Index + node.Length);
+	}, static result => result.Result);
+}

src/2024/09/aoc-2024-09.csproj

@@ -0,0 +1,15 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net8.0</TargetFramework>
+    <RootNamespace>aoc_2024_09</RootNamespace>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\..\core\core.csproj" />
+  </ItemGroup>
+
+</Project>