Initial commit - days 1 to 6

.editorconfig

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+# Code style rules for enforcing the endjin house style
+# See: https://docs.microsoft.com/en-us/visualstudio/ide/editorconfig-code-style-settings-reference
+[*.cs]
+
+# Core editorconfig formatting - indentation
+
+# use soft tabs (spaces) for indentation
+indent_style = space
+
+# Formatting - indentation options
+
+csharp_indent_case_contents = true
+csharp_indent_switch_labels = true
+
+# Formatting - new line options
+
+csharp_new_line_before_catch = true
+csharp_new_line_before_else = true
+csharp_new_line_before_open_brace = object_collection, object_collection_array_initalizers, accessors, lambdas, control_blocks, methods, properties, types
+
+# Formatting - organize using options
+
+dotnet_sort_system_directives_first = true
+
+# Formatting - spacing options
+
+csharp_space_after_cast = false
+csharp_space_after_colon_in_inheritance_clause = true
+csharp_space_after_keywords_in_control_flow_statements = true
+csharp_space_before_colon_in_inheritance_clause = true
+csharp_space_between_method_call_empty_parameter_list_parentheses = false
+csharp_space_between_method_call_name_and_opening_parenthesis = false
+csharp_space_between_method_call_parameter_list_parentheses = false
+csharp_space_between_method_declaration_empty_parameter_list_parentheses = false
+csharp_space_between_method_declaration_parameter_list_parentheses = false
+
+# Formatting - wrapping options
+
+csharp_preserve_single_line_blocks = true
+csharp_preserve_single_line_statements = true
+
+
+# Style - expression bodied member options
+
+csharp_style_expression_bodied_accessors = false:none
+csharp_style_expression_bodied_constructors = false:none
+csharp_style_expression_bodied_methods = false:none
+csharp_style_expression_bodied_properties = false:none
+
+# Style - expression level options
+
+csharp_style_inlined_variable_declaration = true:suggestion
+dotnet_style_predefined_type_for_member_access = true:suggestion
+
+# Style - implicit and explicit types
+
+csharp_style_var_for_built_in_types = false:warning
+csharp_style_var_when_type_is_apparent = true:warning
+csharp_style_var_elsewhere = false:warning
+
+# Style - language keyword and framework type options
+
+dotnet_style_predefined_type_for_locals_parameters_members = true:suggestion
+
+# Style - qualification options
+
+dotnet_style_qualification_for_field = true:suggestion
+dotnet_style_qualification_for_method = true:suggestion
+dotnet_style_qualification_for_property = true:suggestion
+dotnet_style_qualification_for_event = true:suggestion

.gitattributes

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+###############################################################################
+# Set default behavior to automatically normalize line endings.
+###############################################################################
+* text=auto
+
+###############################################################################
+# Set the merge driver for project and solution files
+#
+# Merging from the command prompt will add diff markers to the files if there
+# are conflicts (Merging from VS is not affected by the settings below, in VS
+# the diff markers are never inserted). Diff markers may cause the following 
+# file extensions to fail to load in VS. An alternative would be to treat
+# these files as binary and thus will always conflict and require user
+# intervention with every merge. To do so, just comment the entries below and
+# uncomment the group further below
+###############################################################################
+
+*.sln        text eol=crlf
+*.csproj     text eol=crlf
+*.vbproj     text eol=crlf
+*.vcxproj    text eol=crlf
+*.vcproj     text eol=crlf
+*.dbproj     text eol=crlf
+*.fsproj     text eol=crlf
+*.lsproj     text eol=crlf
+*.wixproj    text eol=crlf
+*.modelproj  text eol=crlf
+*.sqlproj    text eol=crlf
+*.wmaproj    text eol=crlf
+
+*.xproj      text eol=crlf
+*.props      text eol=crlf
+*.filters    text eol=crlf
+*.vcxitems   text eol=crlf
+
+*.json       text 
+
+#*.sln       merge=binary
+#*.csproj    merge=binary
+#*.vbproj    merge=binary
+#*.vcxproj   merge=binary
+#*.vcproj    merge=binary
+#*.dbproj    merge=binary
+#*.fsproj    merge=binary
+#*.lsproj    merge=binary
+#*.wixproj   merge=binary
+#*.modelproj merge=binary
+#*.sqlproj   merge=binary
+#*.wwaproj   merge=binary
+
+#*.xproj     merge=binary
+#*.props     merge=binary
+#*.filters   merge=binary
+#*.vcxitems  merge=binary

.gitignore

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+## Ignore Visual Studio temporary files, build results, and
+## files generated by popular Visual Studio add-ons.
+
+# User-specific files
+*.suo
+*.user
+*.sln.docstates
+local.settings.json
+Configuration.json
+
+# Build results
+Drops/
+BuildArtefacts/
+[Dd]ebug/
+[Dd]ebugPublic/
+[Rr]elease/
+[Rr]eleases/
+x64/
+x86/
+#build/
+bld/
+[Bb]in/
+[Oo]bj/
+
+# Endjin .d.ts
+Endjin.*.d.ts
+Vellum.*.d.ts
+
+# Roslyn cache directories
+*.ide/
+*.vs/
+
+# MSTest test Results
+[Tt]est[Rr]esult*/
+[Bb]uild[Ll]og.*
+
+#NUNIT
+*.VisualState.xml
+TestResult.xml
+
+# Build Results of an ATL Project
+[Dd]ebugPS/
+[Rr]eleasePS/
+dlldata.c
+
+*_i.c
+*_p.c
+*_i.h
+*.ilk
+*.meta
+*.obj
+*.pch
+*.pdb
+*.pgc
+*.pgd
+*.rsp
+*.sbr
+*.tlb
+*.tli
+*.tlh
+*.tmp
+*.tmp_proj
+*.log
+*.vspscc
+*.vssscc
+.builds
+*.pidb
+*.svclog
+*.scc
+
+# Chutzpah Test files
+_Chutzpah*
+
+# Visual C++ cache files
+ipch/
+*.aps
+*.ncb
+*.opensdf
+*.sdf
+*.cachefile
+
+# Visual Studio profiler
+*.psess
+*.vsp
+*.vspx
+
+# TFS 2012 Local Workspace
+$tf/
+
+# Guidance Automation Toolkit
+*.gpState
+
+# ReSharper is a .NET coding add-in
+_ReSharper*/
+*.[Rr]e[Ss]harper
+*.DotSettings.user
+
+# JustCode is a .NET coding addin-in
+.JustCode
+
+# TeamCity is a build add-in
+_TeamCity*
+
+# DotCover is a Code Coverage Tool
+*.dotCover
+
+# NCrunch
+_NCrunch_*
+.*crunch*.local.xml
+
+# MightyMoose
+*.mm.*
+AutoTest.Net/
+
+# Web workbench (sass)
+.sass-cache/
+
+# Installshield output folder
+[Ee]xpress/
+
+# DocProject is a documentation generator add-in
+DocProject/buildhelp/
+DocProject/Help/*.HxT
+DocProject/Help/*.HxC
+DocProject/Help/*.hhc
+DocProject/Help/*.hhk
+DocProject/Help/*.hhp
+DocProject/Help/Html2
+DocProject/Help/html
+
+# Click-Once directory
+publish/
+
+# Publish Web Output
+*.[Pp]ublish.xml
+*.azurePubxml
+# TODO: Comment the next line if you want to checkin your web deploy settings 
+# but database connection strings (with potential passwords) will be unencrypted
+*.pubxml
+*.publishproj
+
+# NuGet Packages
+*.nupkg
+# The packages folder can be ignored because of Package Restore
+**/packages/*
+# except build/, which is used as an MSBuild target.
+!**/packages/build/
+# If using the old MSBuild-Integrated Package Restore, uncomment this:
+#!**/packages/repositories.config
+# except solution packages projects
+!**/Cms/Packages/*
+/
+# Windows Azure Build Output
+csx/
+*.build.csdef
+
+# Windows Store app package directory
+AppPackages/
+
+# Others
+sql/
+*.Cache
+ClientBin/
+# [Ss]tyle[Cc]op.* <-- We want the stylecop config files
+~$*
+*~
+*.dbmdl
+*.dbproj.schemaview
+*.pfx
+*.publishsettings
+node_modules/
+MSDeploy/
+
+# RIA/Silverlight projects
+Generated_Code/
+
+# Backup & report files from converting an old project file
+# to a newer Visual Studio version. Backup files are not needed,
+# because we have git ;-)
+_UpgradeReport_Files/
+Backup*/
+UpgradeLog*.XML
+UpgradeLog*.htm
+
+# SQL Server files
+*.mdf
+*.ldf
+
+# Business Intelligence projects
+*.rdl.data
+*.bim.layout
+*.bim_*.settings
+
+# Microsoft Fakes
+FakesAssemblies/

AdventOfCode2018.sln

@@ -0,0 +1,37 @@
+
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio 15
+VisualStudioVersion = 15.0.28306.52
+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "AoC2018.Solutions", "AoC2018.Solutions\AoC2018.Solutions.csproj", "{875441A6-700B-4CD1-BDEB-FF84A5ACFC47}"
+EndProject
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "AoC2018.Tests", "AoC2018.Tests\AoC2018.Tests.csproj", "{40846808-9418-4723-A857-4580585942DD}"
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "AoC2018.Runner", "AoC2018.Runner\AoC2018.Runner.csproj", "{B3438CDA-5A64-451D-B446-F0778FD0F597}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|Any CPU = Debug|Any CPU
+		Release|Any CPU = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{875441A6-700B-4CD1-BDEB-FF84A5ACFC47}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{875441A6-700B-4CD1-BDEB-FF84A5ACFC47}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{875441A6-700B-4CD1-BDEB-FF84A5ACFC47}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{875441A6-700B-4CD1-BDEB-FF84A5ACFC47}.Release|Any CPU.Build.0 = Release|Any CPU
+		{40846808-9418-4723-A857-4580585942DD}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{40846808-9418-4723-A857-4580585942DD}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{40846808-9418-4723-A857-4580585942DD}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{40846808-9418-4723-A857-4580585942DD}.Release|Any CPU.Build.0 = Release|Any CPU
+		{B3438CDA-5A64-451D-B446-F0778FD0F597}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{B3438CDA-5A64-451D-B446-F0778FD0F597}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{B3438CDA-5A64-451D-B446-F0778FD0F597}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{B3438CDA-5A64-451D-B446-F0778FD0F597}.Release|Any CPU.Build.0 = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+	GlobalSection(ExtensibilityGlobals) = postSolution
+		SolutionGuid = {1940F7C8-FECC-4F11-8FEB-19EC03C47C37}
+	EndGlobalSection
+EndGlobal