update gitignore and run resharper cleanup

21 files changed, 734 insertions, 334 deletions

diff --git a/.gitignore b/.gitignore
index b5e7d97..920d1cd 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,18 +1,21 @@
-*.swp
-*.*~
-project.lock.json
-.DS_Store
-*.pyc
-
-# Visual Studio Code
-.vscode
+## Ignore Visual Studio temporary files, build results, and
+## files generated by popular Visual Studio add-ons.
+##
+## Get latest from https://github.com/github/gitignore/blob/master/VisualStudio.gitignore
 
 # User-specific files
+*.rsuser
 *.suo
 *.user
 *.userosscache
 *.sln.docstates
 
+# User-specific files (MonoDevelop/Xamarin Studio)
+*.userprefs
+
+# Mono auto generated files
+mono_crash.*
+
 # Build results
 [Dd]ebug/
 [Dd]ebugPublic/
@@ -20,13 +23,420 @@ project.lock.json
 [Rr]eleases/
 x64/
 x86/
-build/
+[Aa][Rr][Mm]/
+[Aa][Rr][Mm]64/
 bld/
 [Bb]in/
 [Oo]bj/
-msbuild.log
-msbuild.err
-msbuild.wrn
+[Ll]og/
+[Ll]ogs/
 
-# Visual Studio 2015
+# Visual Studio 2015/2017 cache/options directory
 .vs/
+# Uncomment if you have tasks that create the project's static files in wwwroot
+#wwwroot/
+
+# Visual Studio 2017 auto generated files
+Generated\ Files/
+
+# MSTest test Results
+[Tt]est[Rr]esult*/
+[Bb]uild[Ll]og.*
+
+# NUnit
+*.VisualState.xml
+TestResult.xml
+nunit-*.xml
+
+# Build Results of an ATL Project
+[Dd]ebugPS/
+[Rr]eleasePS/
+dlldata.c
+
+# Benchmark Results
+BenchmarkDotNet.Artifacts/
+
+# .NET Core
+project.lock.json
+project.fragment.lock.json
+artifacts/
+
+# StyleCop
+StyleCopReport.xml
+
+# Files built by Visual Studio
+*_i.c
+*_p.c
+*_h.h
+*.ilk
+*.meta
+*.obj
+*.iobj
+*.pch
+*.pdb
+*.ipdb
+*.pgc
+*.pgd
+*.rsp
+*.sbr
+*.tlb
+*.tli
+*.tlh
+*.tmp
+*.tmp_proj
+*_wpftmp.csproj
+*.log
+*.vspscc
+*.vssscc
+.builds
+*.pidb
+*.svclog
+*.scc
+
+# Chutzpah Test files
+_Chutzpah*
+
+# Visual C++ cache files
+ipch/
+*.aps
+*.ncb
+*.opendb
+*.opensdf
+*.sdf
+*.cachefile
+*.VC.db
+*.VC.VC.opendb
+
+# Visual Studio profiler
+*.psess
+*.vsp
+*.vspx
+*.sap
+
+# Visual Studio Trace Files
+*.e2e
+
+# TFS 2012 Local Workspace
+$tf/
+
+# Guidance Automation Toolkit
+*.gpState
+
+# ReSharper is a .NET coding add-in
+_ReSharper*/
+*.[Rr]e[Ss]harper
+*.DotSettings.user
+
+# TeamCity is a build add-in
+_TeamCity*
+
+# DotCover is a Code Coverage Tool
+*.dotCover
+
+# AxoCover is a Code Coverage Tool
+.axoCover/*
+!.axoCover/settings.json
+
+# Coverlet is a free, cross platform Code Coverage Tool
+coverage*[.json, .xml, .info]
+
+# Visual Studio code coverage results
+*.coverage
+*.coveragexml
+
+# NCrunch
+_NCrunch_*
+.*crunch*.local.xml
+nCrunchTemp_*
+
+# 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
+# Note: 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
+
+# Microsoft Azure Web App publish settings. Comment the next line if you want to
+# checkin your Azure Web App publish settings, but sensitive information contained
+# in these scripts will be unencrypted
+PublishScripts/
+
+# NuGet Packages
+*.nupkg
+# NuGet Symbol Packages
+*.snupkg
+# The packages folder can be ignored because of Package Restore
+**/[Pp]ackages/*
+# except build/, which is used as an MSBuild target.
+!**/[Pp]ackages/build/
+# Uncomment if necessary however generally it will be regenerated when needed
+#!**/[Pp]ackages/repositories.config
+# NuGet v3's project.json files produces more ignorable files
+*.nuget.props
+*.nuget.targets
+
+# Microsoft Azure Build Output
+csx/
+*.build.csdef
+
+# Microsoft Azure Emulator
+ecf/
+rcf/
+
+# Windows Store app package directories and files
+AppPackages/
+BundleArtifacts/
+Package.StoreAssociation.xml
+_pkginfo.txt
+*.appx
+*.appxbundle
+*.appxupload
+
+# Visual Studio cache files
+# files ending in .cache can be ignored
+*.[Cc]ache
+# but keep track of directories ending in .cache
+!?*.[Cc]ache/
+
+# Others
+ClientBin/
+~$*
+*~
+*.dbmdl
+*.dbproj.schemaview
+*.jfm
+*.pfx
+*.publishsettings
+orleans.codegen.cs
+
+# Including strong name files can present a security risk
+# (https://github.com/github/gitignore/pull/2483#issue-259490424)
+#*.snk
+
+# Since there are multiple workflows, uncomment next line to ignore bower_components
+# (https://github.com/github/gitignore/pull/1529#issuecomment-104372622)
+#bower_components/
+
+# 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
+ServiceFabricBackup/
+*.rptproj.bak
+
+# SQL Server files
+*.mdf
+*.ldf
+*.ndf
+
+# Business Intelligence projects
+*.rdl.data
+*.bim.layout
+*.bim_*.settings
+*.rptproj.rsuser
+*- [Bb]ackup.rdl
+*- [Bb]ackup ([0-9]).rdl
+*- [Bb]ackup ([0-9][0-9]).rdl
+
+# Microsoft Fakes
+FakesAssemblies/
+
+# GhostDoc plugin setting file
+*.GhostDoc.xml
+
+# Node.js Tools for Visual Studio
+.ntvs_analysis.dat
+node_modules/
+
+# Visual Studio 6 build log
+*.plg
+
+# Visual Studio 6 workspace options file
+*.opt
+
+# Visual Studio 6 auto-generated workspace file (contains which files were open etc.)
+*.vbw
+
+# Visual Studio LightSwitch build output
+**/*.HTMLClient/GeneratedArtifacts
+**/*.DesktopClient/GeneratedArtifacts
+**/*.DesktopClient/ModelManifest.xml
+**/*.Server/GeneratedArtifacts
+**/*.Server/ModelManifest.xml
+_Pvt_Extensions
+
+# Paket dependency manager
+.paket/paket.exe
+paket-files/
+
+# FAKE - F# Make
+.fake/
+
+# CodeRush personal settings
+.cr/personal
+
+# Python Tools for Visual Studio (PTVS)
+__pycache__/
+*.pyc
+
+# Cake - Uncomment if you are using it
+# tools/**
+# !tools/packages.config
+
+# Tabs Studio
+*.tss
+
+# Telerik's JustMock configuration file
+*.jmconfig
+
+# BizTalk build output
+*.btp.cs
+*.btm.cs
+*.odx.cs
+*.xsd.cs
+
+# OpenCover UI analysis results
+OpenCover/
+
+# Azure Stream Analytics local run output
+ASALocalRun/
+
+# MSBuild Binary and Structured Log
+*.binlog
+
+# NVidia Nsight GPU debugger configuration file
+*.nvuser
+
+# MFractors (Xamarin productivity tool) working folder
+.mfractor/
+
+# Local History for Visual Studio
+.localhistory/
+
+# BeatPulse healthcheck temp database
+healthchecksdb
+
+# Backup folder for Package Reference Convert tool in Visual Studio 2017
+MigrationBackup/
+
+# Ionide (cross platform F# VS Code tools) working folder
+.ionide/
+
+##
+## Visual studio for Mac
+##
+
+
+# globs
+Makefile.in
+*.userprefs
+*.usertasks
+config.make
+config.status
+aclocal.m4
+install-sh
+autom4te.cache/
+*.tar.gz
+tarballs/
+test-results/
+
+# Mac bundle stuff
+*.dmg
+*.app
+
+# content below from: https://github.com/github/gitignore/blob/master/Global/macOS.gitignore
+# General
+.DS_Store
+.AppleDouble
+.LSOverride
+
+# Icon must end with two \r
+Icon
+
+
+# Thumbnails
+._*
+
+# Files that might appear in the root of a volume
+.DocumentRevisions-V100
+.fseventsd
+.Spotlight-V100
+.TemporaryItems
+.Trashes
+.VolumeIcon.icns
+.com.apple.timemachine.donotpresent
+
+# Directories potentially created on remote AFP share
+.AppleDB
+.AppleDesktop
+Network Trash Folder
+Temporary Items
+.apdisk
+
+# content below from: https://github.com/github/gitignore/blob/master/Global/Windows.gitignore
+# Windows thumbnail cache files
+Thumbs.db
+ehthumbs.db
+ehthumbs_vista.db
+
+# Dump file
+*.stackdump
+
+# Folder config file
+[Dd]esktop.ini
+
+# Recycle Bin used on file shares
+$RECYCLE.BIN/
+
+# Windows Installer files
+*.cab
+*.msi
+*.msix
+*.msm
+*.msp
+
+# Windows shortcuts
+*.lnk
+
+# JetBrains Rider
+.idea/
+*.sln.iml
+
+##
+## Visual Studio Code
+##
+.vscode/*
+!.vscode/settings.json
+!.vscode/tasks.json
+!.vscode/launch.json
+!.vscode/extensions.json
diff --git a/Day.cs b/Day.cs
index 54c4b5d..d8e7e7c 100644
--- a/Day.cs
+++ b/Day.cs
@@ -8,6 +8,7 @@ namespace aoc2019
     public abstract class Day
     {
         public abstract int DayNumber { get; }
+
         public virtual IEnumerable<string> Input =>
             File.ReadLines($"input/day{DayNumber}.in");
 
@@ -33,4 +34,4 @@ namespace aoc2019
         public abstract string Part1();
         public abstract string Part2();
     }
-}
+}
\ No newline at end of file
diff --git a/Day1.cs b/Day1.cs
index 53b808c..979db5f 100644
--- a/Day1.cs
+++ b/Day1.cs
@@ -5,15 +5,20 @@ namespace aoc2019
 {
     internal sealed class Day1 : Day
     {
-        public override int DayNumber => 1;
-
         private readonly IEnumerable<int> masses;
+
         public Day1()
         {
             masses = Input.Select(int.Parse);
         }
 
-        private static int FuelCost(int weight) => weight / 3 - 2;
+        public override int DayNumber => 1;
+
+        private static int FuelCost(int weight)
+        {
+            return weight / 3 - 2;
+        }
+
         private static int FullCost(int cost)
         {
             int total = 0, newcost, tmp = cost;
@@ -27,8 +32,14 @@ namespace aoc2019
             return total;
         }
 
-        public override string Part1() => $"{masses.Sum(FuelCost)}";
+        public override string Part1()
+        {
+            return $"{masses.Sum(FuelCost)}";
+        }
 
-        public override string Part2() => $"{masses.Sum(FullCost)}";
+        public override string Part2()
+        {
+            return $"{masses.Sum(FullCost)}";
+        }
     }
-}
+}
\ No newline at end of file
diff --git a/Day10.cs b/Day10.cs
index eec1e57..5886556 100644
--- a/Day10.cs
+++ b/Day10.cs
@@ -1,14 +1,12 @@
-using aoc2019.lib;
 using System;
 using System.Collections.Generic;
 using System.Linq;
+using aoc2019.lib;
 
 namespace aoc2019
 {
     internal sealed class Day10 : Day
     {
-        public override int DayNumber => 10;
-
         private readonly HashSet<(int x, int y)> asteroids = new HashSet<(int x, int y)>();
         private (int x, int y) best = (x: -1, y: -1);
         private int bestcansee;
@@ -23,12 +21,14 @@ namespace aoc2019
                 .ToHashSet();
         }
 
+        public override int DayNumber => 10;
+
         public override string Part1()
         {
             foreach (var asteroid in asteroids)
             {
                 var cansee = asteroids
-                    .Except(new[] { asteroid })
+                    .Except(new[] {asteroid})
                     .Select(a => (x: a.x - asteroid.x, y: a.y - asteroid.y))
                     .GroupBy(a => Math.Atan2(a.y, a.x))
                     .Count();
@@ -39,12 +39,14 @@ namespace aoc2019
                     bestcansee = cansee;
                 }
             }
+
             return $"{bestcansee}";
         }
 
         public override string Part2()
         {
-            static IEnumerable<(int x, int y, double angle, double dist)> GetValue(Queue<(int x, int y, double angle, double dist)> q)
+            static IEnumerable<(int x, int y, double angle, double dist)> GetValue(
+                Queue<(int x, int y, double angle, double dist)> q)
             {
                 if (q.Count > 0) yield return q.Dequeue();
             }
@@ -70,4 +72,4 @@ namespace aoc2019
                 .ToString();
         }
     }
-}
+}
\ No newline at end of file
diff --git a/Day11.cs b/Day11.cs
index 4fc323b..647be9a 100644
--- a/Day11.cs
+++ b/Day11.cs
@@ -1,48 +1,62 @@
-using aoc2019.lib;
 using System;
 using System.Collections.Generic;
 using System.Linq;
+using aoc2019.lib;
 
 namespace aoc2019
 {
     internal sealed class Day11 : Day
     {
-        public override int DayNumber => 11;
-
         private readonly IntCodeVM vm;
-        private long x, y;
         private Direction heading;
+        private long x, y;
 
         public Day11()
         {
             vm = new IntCodeVM(Input.First());
         }
 
-        enum Direction
-        {
-            Up, Down, Left, Right
-        }
+        public override int DayNumber => 11;
 
         private void Move()
         {
             switch (heading)
             {
-                case Direction.Up: y++; break;
-                case Direction.Down: y--; break;
-                case Direction.Left: x--; break;
-                case Direction.Right: x++; break;
-            };
+                case Direction.Up:
+                    y++;
+                    break;
+                case Direction.Down:
+                    y--;
+                    break;
+                case Direction.Left:
+                    x--;
+                    break;
+                case Direction.Right:
+                    x++;
+                    break;
+            }
+
+            ;
         }
 
         private void Turn(long direction)
         {
             switch (heading)
             {
-                case Direction.Up: heading = direction == 0 ? Direction.Left : Direction.Right; break;
-                case Direction.Down: heading = direction == 0 ? Direction.Right : Direction.Left; break;
-                case Direction.Left: heading = direction == 0 ? Direction.Down : Direction.Up; break;
-                case Direction.Right: heading = direction == 0 ? Direction.Up : Direction.Down; break;
+                case Direction.Up:
+                    heading = direction == 0 ? Direction.Left : Direction.Right;
+                    break;
+                case Direction.Down:
+                    heading = direction == 0 ? Direction.Right : Direction.Left;
+                    break;
+                case Direction.Left:
+                    heading = direction == 0 ? Direction.Down : Direction.Up;
+                    break;
+                case Direction.Right:
+                    heading = direction == 0 ? Direction.Up : Direction.Down;
+                    break;
             }
+
             Move();
         }
 
@@ -51,7 +65,8 @@ namespace aoc2019
             var map = new Dictionary<(long, long), long>();
             vm.Reset();
             heading = Direction.Up;
-            x = 0; y = 0;
+            x = 0;
+            y = 0;
             map[(x, y)] = initialVal;
 
             var haltType = IntCodeVM.HaltType.Waiting;
@@ -73,19 +88,27 @@ namespace aoc2019
         public override string Part2()
         {
             var map = PaintShip(1);
-            int minX = (int)map.Keys.Select(x => x.x).Min();
-            int maxX = (int)map.Keys.Select(x => x.x).Max();
-            int minY = (int)map.Keys.Select(x => x.y).Min();
-            int maxY = (int)map.Keys.Select(x => x.y).Max();
+            var minX = (int) map.Keys.Select(x => x.x).Min();
+            var maxX = (int) map.Keys.Select(x => x.x).Max();
+            var minY = (int) map.Keys.Select(x => x.y).Min();
+            var maxY = (int) map.Keys.Select(x => x.y).Max();
 
             return Enumerable.Range(minY, maxY - minY + 1)
                 .Select(y =>
                     Enumerable.Range(minX, maxX - minX + 1)
-                    .Select(x => map.GetValueOrDefault((x, y)) == 0 ? ' ' : '#')
-                    .ToDelimitedString()
+                        .Select(x => map.GetValueOrDefault((x, y)) == 0 ? ' ' : '#')
+                        .ToDelimitedString()
                 )
                 .Reverse()
                 .ToDelimitedString(Environment.NewLine);
         }
+
+        private enum Direction
+        {
+            Up,
+            Down,
+            Left,
+            Right
+        }
     }
-}
+}
\ No newline at end of file
diff --git a/Day12.cs b/Day12.cs
index efb380a..b04426d 100644
--- a/Day12.cs
+++ b/Day12.cs
@@ -1,4 +1,3 @@
-using aoc2019.lib;
 using System;
 using System.Collections.Generic;
 using System.Linq;
@@ -7,21 +6,20 @@ namespace aoc2019
 {
     internal sealed class Day12 : Day
     {
-        public override int DayNumber => 12;
-
-        private List<Position> moons;
         private readonly List<Position> startingPositions;
+
+        private readonly List<Position> moons;
         private int step;
 
         public Day12()
         {
             moons = Input
-                .Select(moon => 
+                .Select(moon =>
                     moon
-                    .TrimStart('<')
-                    .TrimEnd('>')
-                    .Split(",")
-                    .Select(val => int.Parse(val.Split("=").Last()))
+                        .TrimStart('<')
+                        .TrimEnd('>')
+                        .Split(",")
+                        .Select(val => int.Parse(val.Split("=").Last()))
                 )
                 .Select(moon => new Position(moon.ToList()))
                 .ToList();
@@ -32,56 +30,11 @@ namespace aoc2019
             startingPositions = moons;
         }
 
-        public class Position
-        {
-            public int x, y, z;
-            public int dx, dy, dz;
-            List<Position> siblings;
-
-            public Position(IList<int> moon)
-            {
-                x = moon[0];
-                y = moon[1];
-                z = moon[2];
-                dx = 0; dy = 0; dz = 0;
-            }
-
-            public void SetSiblings(List<Position> positions)
-            {
-                siblings = positions.Where(p => p != this).ToList();
-            }
-
-            public override string ToString() =>
-                $"pos=<x={x}, y={y}, z={z}> vel=<x={dx}, y={dy}, z={dz}>";
-
-            internal void Gravitate()
-            {
-                foreach (var m in siblings)
-                {
-                    if (x != m.x) dx += x > m.x ? -1 : 1;
-                    if (y != m.y) dy += y > m.y ? -1 : 1;
-                    if (z != m.z) dz += z > m.z ? -1 : 1;
-                }
-            }
-
-            internal void Move()
-            {
-                x += dx;
-                y += dy;
-                z += dz;
-            }
-
-            internal int KineticEnergy =>
-                Math.Abs(x) + Math.Abs(y) + Math.Abs(z);
-            internal int PotentialEnergy =>
-                Math.Abs(dx) + Math.Abs(dy) + Math.Abs(dz);
-            internal int TotalEnergy =>
-                KineticEnergy * PotentialEnergy;
-        }
+        public override int DayNumber => 12;
 
         public static long LCM(long a, long b)
         {
-            return (a * b) / GCD(a, b);
+            return a * b / GCD(a, b);
         }
 
         public static long GCD(long a, long b)
@@ -113,7 +66,8 @@ namespace aoc2019
         {
             int cycleX = 0, cycleY = 0, cycleZ = 0;
 
-            while (cycleX == 0 || cycleY == 0 || cycleZ == 0) {
+            while (cycleX == 0 || cycleY == 0 || cycleZ == 0)
+            {
                 Step();
                 if (cycleX == 0 && moons.All(m => m.dx == 0)) cycleX = step * 2;
                 if (cycleY == 0 && moons.All(m => m.dy == 0)) cycleY = step * 2;
@@ -122,5 +76,58 @@ namespace aoc2019
 
             return $"{LCM(cycleX, LCM(cycleY, cycleZ))}";
         }
+
+        public class Position
+        {
+            public int dx, dy, dz;
+            private List<Position> siblings;
+            public int x, y, z;
+
+            public Position(IList<int> moon)
+            {
+                x = moon[0];
+                y = moon[1];
+                z = moon[2];
+                dx = 0;
+                dy = 0;
+                dz = 0;
+            }
+
+            internal int KineticEnergy =>
+                Math.Abs(x) + Math.Abs(y) + Math.Abs(z);
+
+            internal int PotentialEnergy =>
+                Math.Abs(dx) + Math.Abs(dy) + Math.Abs(dz);
+
+            internal int TotalEnergy =>
+                KineticEnergy * PotentialEnergy;
+
+            public void SetSiblings(List<Position> positions)
+            {
+                siblings = positions.Where(p => p != this).ToList();
+            }
+
+            public override string ToString()
+            {
+                return $"pos=<x={x}, y={y}, z={z}> vel=<x={dx}, y={dy}, z={dz}>";
+            }
+
+            internal void Gravitate()
+            {
+                foreach (var m in siblings)
+                {
+                    if (x != m.x) dx += x > m.x ? -1 : 1;
+                    if (y != m.y) dy += y > m.y ? -1 : 1;
+                    if (z != m.z) dz += z > m.z ? -1 : 1;
+                }
+            }
+
+            internal void Move()
+            {
+                x += dx;
+                y += dy;
+                z += dz;
+            }
+        }
     }
-}
+}
\ No newline at end of file
diff --git a/Day13.cs b/Day13.cs
index 31425c0..17e053d 100644
--- a/Day13.cs
+++ b/Day13.cs
@@ -1,16 +1,15 @@
-using aoc2019.lib;
 using System;
 using System.Collections.Generic;
 using System.Linq;
+using aoc2019.lib;
 
 namespace aoc2019
 {
     internal sealed class Day13 : Day
     {
-        public override int DayNumber => 13;
+        private readonly Dictionary<(int x, int y), int> board;
 
         private readonly IntCodeVM vm;
-        private readonly Dictionary<(int x, int y), int> board;
 
         public Day13()
         {
@@ -18,9 +17,11 @@ namespace aoc2019
             board = new Dictionary<(int, int), int>();
         }
 
+        public override int DayNumber => 13;
+
         private void UpdateTiles(IEnumerable<long> queue)
         {
-            var input = queue.Select(i => (int)i).ToList();
+            var input = queue.Select(i => (int) i).ToList();
 
             for (var i = 0; i < input.Count - 2; i += 3)
             {
@@ -33,7 +34,6 @@ namespace aoc2019
                 else
                     board.Add((x, y), val);
             }
-
         }
 
         private void PrintBoard()
@@ -87,4 +87,4 @@ namespace aoc2019
             return $"after {gameTicks} moves, the score is: {board[(-1, 0)]}";
         }
     }
-}
+}
\ No newline at end of file
diff --git a/Day14.cs b/Day14.cs
index 7706c0b..e4c46e8 100644
--- a/Day14.cs
+++ b/Day14.cs
@@ -6,48 +6,18 @@ namespace aoc2019
 {
     internal sealed class Day14 : Day
     {
-        public override int DayNumber => 14;
+        private readonly Dictionary<string, Reaction> reactions;
 
         private Dictionary<string, long> available;
-        private readonly Dictionary<string, Reaction> reactions;
 
-        private struct Component
+        public Day14()
         {
-            public string Name { get; set; }
-            public int Quantity { get; set; }
+            reactions = Input
+                .Select(Reaction.Parse)
+                .ToDictionary(r => r.product.Name);
         }
 
-        private class Reaction
-        {
-            public readonly Component product;
-            public readonly Component[] reactants;
-
-            private Reaction(Component[] reactants, Component product)
-            {
-                this.reactants = reactants;
-                this.product = product;
-            }
-
-            public static Reaction Parse(string s)
-            {
-                var ss = s.Split(new[] { ", ", " => " }, System.StringSplitOptions.None);
-
-                return new Reaction(
-                    ss.Take(ss.Length - 1).Select(ParseComponent).ToArray(),
-                    ParseComponent(ss[^1])
-                );
-
-                static Component ParseComponent(string s)
-                {
-                    var spl = s.Split(' ', 2);
-                    return new Component
-                    {
-                        Quantity = int.Parse(spl[0]),
-                        Name = spl[1]
-                    };
-                }
-            }
-        }
+        public override int DayNumber => 14;
 
         private bool Consume(string chem, long quantity)
         {
@@ -70,7 +40,7 @@ namespace aoc2019
                 return false;
 
             var reaction = reactions[chem];
-            var reactionCount = (long)Math.Ceiling((double)quantity / reaction.product.Quantity);
+            var reactionCount = (long) Math.Ceiling((double) quantity / reaction.product.Quantity);
 
             foreach (var reactant in reaction.reactants)
                 if (!Consume(reactant.Name, reactionCount * reactant.Quantity))
@@ -80,23 +50,56 @@ namespace aoc2019
             return true;
         }
 
-        public Day14()
-        {
-            reactions = Input
-                .Select(Reaction.Parse)
-                .ToDictionary(r => r.product.Name);
-        }
-
         public override string Part1()
         {
-            available = new Dictionary<string, long> { { "ORE", long.MaxValue } };
+            available = new Dictionary<string, long> {{"ORE", long.MaxValue}};
             Consume("FUEL", 1);
             return $"{long.MaxValue - available["ORE"]}";
         }
 
         public override string Part2()
         {
+            available = new Dictionary<string, long> {{"ORE", 1000000000000}};
+            Consume("FUEL", long.MaxValue);
             return "";
         }
+
+        private struct Component
+        {
+            public string Name { get; set; }
+            public int Quantity { get; set; }
+        }
+
+        private class Reaction
+        {
+            public readonly Component product;
+            public readonly Component[] reactants;
+
+            private Reaction(Component[] reactants, Component product)
+            {
+                this.reactants = reactants;
+                this.product = product;
+            }
+
+            public static Reaction Parse(string s)
+            {
+                var ss = s.Split(new[] {", ", " => "}, StringSplitOptions.None);
+
+                return new Reaction(
+                    ss.Take(ss.Length - 1).Select(ParseComponent).ToArray(),
+                    ParseComponent(ss[^1])
+                );
+
+                static Component ParseComponent(string s)
+                {
+                    var spl = s.Split(' ', 2);
+                    return new Component
+                    {
+                        Quantity = int.Parse(spl[0]),
+                        Name = spl[1]
+                    };
+                }
+            }
+        }
     }
-}
+}
\ No newline at end of file
diff --git a/Day15.cs b/Day15.cs
index b68d251..487030f 100644
--- a/Day15.cs
+++ b/Day15.cs
@@ -1,97 +1,22 @@
-using System;
-using System.Collections.Generic;
 using System.Linq;
+using aoc2019.lib;
 
 namespace aoc2019
 {
     internal sealed class Day15 : Day
     {
-        public override int DayNumber => 15;
-
-        private Dictionary<string, long>? available;
-        private readonly Dictionary<string, Reaction>? reactions;
-
-        private struct Component
-        {
-            public string Name { get; set; }
-            public int Quantity { get; set; }
-        }
-
-        private class Reaction
-        {
-            public Component product;
-            public Component[] reactants;
-
-            public Reaction(Component[] reactants, Component product)
-            {
-                this.reactants = reactants;
-                this.product = product;
-            }
-
-            public static Reaction Parse(string s)
-            {
-                var ss = s.Split(new[] { ", ", " => " }, System.StringSplitOptions.None);
-
-                return new Reaction(
-                    ss.Take(ss.Length - 1).Select(ParseComponent).ToArray(),
-                    ParseComponent(ss[^1])
-                );
-
-                static Component ParseComponent(string s)
-                {
-                    var i = s.IndexOf(' ');
-                    return new Component
-                    {
-                        Name = s[(i + 1)..],
-                        Quantity = int.Parse(s.Substring(i))
-                    };
-                }
-            }
-        }
-
-        private bool Consume(string chem, long quantity)
-        {
-            if (quantity <= 0)
-                throw new ArgumentOutOfRangeException();
-
-            if (!available!.ContainsKey(chem))
-                available[chem] = 0;
-
-            if (available[chem] < quantity && !Produce(chem, quantity - available[chem]))
-                return false;
-
-            available[chem] -= quantity;
-            return true;
-        }
-
-        private bool Produce(string chem, long quantity)
-        {
-            if (chem == "ORE")
-                return false;
-
-            var reaction = reactions[chem];
-            var reactionCount = (long)Math.Ceiling((double)quantity / reaction.product.Quantity);
-
-            foreach (var reactant in reaction.reactants)
-                if (!Consume(reactant.Name, reactionCount * reactant.Quantity))
-                    return false;
-
-            available![chem] = available.GetValueOrDefault(chem) + reactionCount * reaction.product.Quantity;
-            return true;
-        }
+        private readonly IntCodeVM vm;
 
         public Day15()
         {
-            reactions = Input
-                .Select(Reaction.Parse)
-                .ToDictionary(r => r.product.Name);
+            vm = new IntCodeVM(Input.First());
         }
 
+        public override int DayNumber => 15;
+
         public override string Part1()
         {
-            available = new Dictionary<string, long> { { "ORE", long.MaxValue } };
-            Consume("FUEL", 1);
-            return $"{long.MaxValue - available["ORE"]}";
+            return "intcode solution";
         }
 
         public override string Part2()
@@ -99,4 +24,4 @@ namespace aoc2019
             return "";
         }
     }
-}
+}
\ No newline at end of file
diff --git a/Day16.cs b/Day16.cs
index 095f152..7baa2c9 100644
--- a/Day16.cs
+++ b/Day16.cs
@@ -1,17 +1,9 @@
-using System;
-using System.Collections.Generic;
-using System.Linq;
-
 namespace aoc2019
 {
     internal sealed class Day16 : Day
     {
         public override int DayNumber => 16;
 
-        public Day16()
-        {
-        }
-
         public override string Part1()
         {
             return "";
@@ -22,4 +14,4 @@ namespace aoc2019
             return "";
         }
     }
-}
+}
\ No newline at end of file
diff --git a/Day2.cs b/Day2.cs
index 580571f..f4b11e6 100644
--- a/Day2.cs
+++ b/Day2.cs
@@ -5,18 +5,20 @@ namespace aoc2019
 {
     internal sealed class Day2 : Day
     {
-        public override int DayNumber => 2;
-
         private readonly IEnumerable<int> input;
+
         public Day2()
         {
             input = Input.First().Split(',').Select(int.Parse);
         }
 
+        public override int DayNumber => 2;
+
         public int RunIntCode(int noun, int verb)
         {
             var v = input.ToList();
-            v[1] = noun; v[2] = verb;
+            v[1] = noun;
+            v[2] = verb;
 
             for (var i = 0; v[i] != 99; i += 4)
                 v[v[i + 3]] = v[i] switch
@@ -36,12 +38,11 @@ namespace aoc2019
         public override string Part2()
         {
             for (var i = 0; i < 100; i++)
-                for (var j = 0; j < 100; j++)
-                    if (RunIntCode(i, j) == 19690720)
-                        return $"{100 * i + j}";
+            for (var j = 0; j < 100; j++)
+                if (RunIntCode(i, j) == 19690720)
+                    return $"{100 * i + j}";
 
             return string.Empty;
         }
     }
-}
-
+}
\ No newline at end of file
diff --git a/Day3.cs b/Day3.cs
index 6bdf8ea..12f10d4 100644
--- a/Day3.cs
+++ b/Day3.cs
@@ -6,8 +6,6 @@ namespace aoc2019
 {
     internal sealed class Day3 : Day
     {
-        public override int DayNumber => 3;
-
         private readonly IEnumerable<(int, int)> intersections;
         private readonly List<Dictionary<(int, int), int>> wires;
 
@@ -17,6 +15,8 @@ namespace aoc2019
             intersections = wires[0].Keys.Intersect(wires[1].Keys);
         }
 
+        public override int DayNumber => 3;
+
         public override string Part1()
         {
             return $"{intersections.Min(x => Math.Abs(x.Item1) + Math.Abs(x.Item2))}";
@@ -38,14 +38,22 @@ namespace aoc2019
                 var d = int.Parse(step.Substring(1));
                 switch (step[0])
                 {
-                    case 'U': for (i = 0; i < d; i++) r.TryAdd((x, ++y), c++); break;
-                    case 'D': for (i = 0; i < d; i++) r.TryAdd((x, --y), c++); break;
-                    case 'R': for (i = 0; i < d; i++) r.TryAdd((++x, y), c++); break;
-                    case 'L': for (i = 0; i < d; i++) r.TryAdd((--x, y), c++); break;
+                    case 'U':
+                        for (i = 0; i < d; i++) r.TryAdd((x, ++y), c++);
+                        break;
+                    case 'D':
+                        for (i = 0; i < d; i++) r.TryAdd((x, --y), c++);
+                        break;
+                    case 'R':
+                        for (i = 0; i < d; i++) r.TryAdd((++x, y), c++);
+                        break;
+                    case 'L':
+                        for (i = 0; i < d; i++) r.TryAdd((--x, y), c++);
+                        break;
                 }
             }
 
             return r;
         }
     }
-}
+}
\ No newline at end of file
diff --git a/Day4.cs b/Day4.cs
index b6b2c91..53d335d 100644
--- a/Day4.cs
+++ b/Day4.cs
@@ -4,28 +4,31 @@ namespace aoc2019
 {
     internal sealed class Day4 : Day
     {
-        public override int DayNumber => 4;
+        private readonly int end;
 
         private readonly int start;
-        private readonly int end;
 
         public Day4()
         {
             var range = Input.First().Split('-').Select(int.Parse).ToList();
-            start = range[0]; end = range[1];
+            start = range[0];
+            end = range[1];
         }
 
+        public override int DayNumber => 4;
+
         private bool IsValid(int i)
         {
-            int prev = 0; bool hasDup = false;
+            var prev = 0;
+            var hasDup = false;
             foreach (var c in i.ToString())
             {
-                int curr = c - '0';
+                var curr = c - '0';
                 if (curr < prev) return false;
                 if (curr == prev) hasDup = true;
                 prev = curr;
             }
-            
+
             return i >= start && i <= end && hasDup;
         }
 
@@ -45,5 +48,4 @@ namespace aoc2019
             return $"{Enumerable.Range(start, end).Count(HasOnePair)}";
         }
     }
-}
-
+}
\ No newline at end of file
diff --git a/Day5.cs b/Day5.cs
index fc360aa..88465db 100644
--- a/Day5.cs
+++ b/Day5.cs
@@ -5,22 +5,26 @@ namespace aoc2019
 {
     internal sealed class Day5 : Day
     {
-        public override int DayNumber => 5;
-
         private readonly IEnumerable<int> tape;
+
+        private int output;
+
         public Day5()
         {
             tape = Input.First().Split(',').Select(int.Parse);
         }
 
-        private int output;
+        public override int DayNumber => 5;
+
         public void RunIntCode(List<int> v, int input)
         {
             var i = 0;
             while (i < v.Count && v[i] != 99)
             {
-                int Val(int mode, int val) =>
-                    mode != 0 ? val : v[val];
+                int Val(int mode, int val)
+                {
+                    return mode != 0 ? val : v[val];
+                }
 
                 var mode1 = v[i] / 100 % 10;
                 var mode2 = v[i] / 1000;
@@ -60,6 +64,7 @@ namespace aoc2019
                 }
             }
         }
+
         public override string Part1()
         {
             RunIntCode(tape.ToList(), 1);
@@ -72,4 +77,4 @@ namespace aoc2019
             return $"{output}";
         }
     }
-}
+}
\ No newline at end of file
diff --git a/Day6.cs b/Day6.cs
index 50dd605..d92b402 100644
--- a/Day6.cs
+++ b/Day6.cs
@@ -5,14 +5,15 @@ namespace aoc2019
 {
     internal sealed class Day6 : Day
     {
-        public override int DayNumber => 6;
-
         private readonly Dictionary<string, string> input;
+
         public Day6()
         {
             input = Input.ToDictionary(i => i.Split(')')[1], i => i.Split(')')[0]);
         }
 
+        public override int DayNumber => 6;
+
         private List<string> GetParents(string obj)
         {
             var res = new List<string>();
@@ -29,11 +30,11 @@ namespace aoc2019
 
         public override string Part2()
         {
-            List<string> you = GetParents("YOU");
-            List<string> san = GetParents("SAN");
-            int common = 1;
-            for (; you[^common] == san[^common]; common++);
+            var you = GetParents("YOU");
+            var san = GetParents("SAN");
+            var common = 1;
+            for (; you[^common] == san[^common]; common++) ;
             return $"{you.Count + san.Count - common * 2}";
         }
     }
-}
+}
\ No newline at end of file
diff --git a/Day7.cs b/Day7.cs
index 7f94e5a..123d075 100644
--- a/Day7.cs
+++ b/Day7.cs
@@ -1,20 +1,20 @@
-using aoc2019.lib;
 using System.Collections.Generic;
 using System.Linq;
+using aoc2019.lib;
 
 namespace aoc2019
 {
     internal sealed class Day7 : Day
     {
-        public override int DayNumber => 7;
-
         private readonly IntCodeVM[] Amplifiers = new IntCodeVM[5];
+
         public Day7()
         {
             for (var i = 0; i < 5; i++) Amplifiers[i] = new IntCodeVM(Input.First());
         }
 
-        
+        public override int DayNumber => 7;
+
 
         public override string Part1()
         {
@@ -67,4 +67,4 @@ namespace aoc2019
             return $"{largest}";
         }
     }
-}
+}
\ No newline at end of file
diff --git a/Day8.cs b/Day8.cs
index 1666544..27182ad 100644
--- a/Day8.cs
+++ b/Day8.cs
@@ -1,20 +1,21 @@
-using aoc2019.lib;
 using System;
 using System.Collections.Generic;
 using System.Linq;
+using aoc2019.lib;
 
 namespace aoc2019
 {
     internal sealed class Day8 : Day
     {
-        public override int DayNumber => 8;
-
         private readonly List<List<char>> photo;
+
         public Day8()
         {
             photo = Input.First().Chunk(25 * 6).Select(s => s.ToList()).ToList();
         }
 
+        public override int DayNumber => 8;
+
         public override string Part1()
         {
             var l = photo.OrderBy(layer => layer.Count(pixel => pixel == '0')).First();
@@ -36,4 +37,4 @@ namespace aoc2019
                 .Replace('1', 'x');
         }
     }
-}
+}
\ No newline at end of file
diff --git a/Day9.cs b/Day9.cs
index c6de017..77e72e1 100644
--- a/Day9.cs
+++ b/Day9.cs
@@ -1,11 +1,10 @@
-using aoc2019.lib;
 using System.Linq;
+using aoc2019.lib;
 
 namespace aoc2019
 {
     internal sealed class Day9 : Day
     {
-        public override int DayNumber => 9;
         private readonly IntCodeVM vm;
 
         public Day9()
@@ -13,6 +12,8 @@ namespace aoc2019
             vm = new IntCodeVM(Input.First());
         }
 
+        public override int DayNumber => 9;
+
         public override string Part1()
         {
             vm.Reset();
@@ -27,4 +28,4 @@ namespace aoc2019
             return $"{vm.output.ToDelimitedString(",")}";
         }
     }
-}
+}
\ No newline at end of file
diff --git a/Program.cs b/Program.cs
index 981804b..4338952 100644
--- a/Program.cs
+++ b/Program.cs
@@ -1,5 +1,4 @@
 using System;

-using System.Collections.Generic;

 using System.Linq;

 using System.Reflection;

 

@@ -9,7 +8,7 @@ namespace aoc2019
     {

         private static void Main(string[] args)

         {

-            var days = 

+            var days =

                 Assembly.GetExecutingAssembly().GetTypes()

                     .Where(t => t.BaseType == typeof(Day))

                     .Select(t => (Day) Activator.CreateInstance(t))

@@ -18,7 +17,7 @@ namespace aoc2019
             if (args.Length == 1 && int.TryParse(args[0], out var dayNum))

             {

                 var day = days.FirstOrDefault(d => d.DayNumber == dayNum);

-                

+

                 if (day != null)

                     day.AllParts();

                 else

@@ -26,11 +25,8 @@ namespace aoc2019
             }

             else

             {

-                foreach (var d in days)

-                {

-                    d.AllParts();

-                }

+                foreach (var d in days) d.AllParts();

             }

         }

     }

-}

+}
\ No newline at end of file
diff --git a/lib/Extensions.cs b/lib/Extensions.cs
index 3c81f17..a1ffbcc 100644
--- a/lib/Extensions.cs
+++ b/lib/Extensions.cs
@@ -1,5 +1,4 @@
-using System;
-using System.Collections.Generic;
+using System.Collections.Generic;
 using System.Linq;
 
 namespace aoc2019.lib
@@ -8,13 +7,13 @@ namespace aoc2019.lib
     {
         public static IEnumerable<IEnumerable<T>> Permute<T>(this IEnumerable<T> list)
         {
-            if (list.Count() == 1) return new[] { list };
+            if (list.Count() == 1) return new[] {list};
             return list.SelectMany(t => Permute(list.Where(x => !x.Equals(t))), (v, p) => p.Prepend(v));
         }
 
         public static IEnumerable<string> Chunk(this string str, int chunkSize)
         {
-            for (int i = 0; i < str.Length; i += chunkSize)
+            for (var i = 0; i < str.Length; i += chunkSize)
                 yield return str.Substring(i, chunkSize);
         }
 
@@ -30,4 +29,4 @@ namespace aoc2019.lib
                     yield return item;
         }
     }
-}
+}
\ No newline at end of file
diff --git a/lib/IntCodeVM.cs b/lib/IntCodeVM.cs
index 472da92..d35444b 100644
--- a/lib/IntCodeVM.cs
+++ b/lib/IntCodeVM.cs
@@ -6,11 +6,17 @@ namespace aoc2019.lib
 {
     public class IntCodeVM
     {
-        private long i;
-        private long relbase;
-        public long[] memory;
+        public enum HaltType
+        {
+            Terminate,
+            Waiting
+        }
+
         private readonly long[] program;
+        private long i;
         public Queue<long> input, output;
+        public long[] memory;
+        private long relbase;
 
         public IntCodeVM(string tape)
         {
@@ -22,11 +28,7 @@ namespace aoc2019.lib
             output = new Queue<long>();
         }
 
-        public enum HaltType
-        {
-            Terminate,
-            Waiting
-        }
+        public long Result => output.Dequeue();
 
         public void Reset()
         {
@@ -37,8 +39,6 @@ namespace aoc2019.lib
             output.Clear();
         }
 
-        public long Result => output.Dequeue();
-
         public void AddInput(long value)
         {
             input.Enqueue(value);
@@ -53,7 +53,7 @@ namespace aoc2019.lib
         {
             if (addr < 0) addr = 0;
             if (addr >= memory.Length)
-                Array.Resize(ref memory, (int)addr + 1);
+                Array.Resize(ref memory, (int) addr + 1);
             memory[addr] = value;
         }
 
@@ -82,9 +82,13 @@ namespace aoc2019.lib
             var param = MemGet(i + idx);
             switch (Mode(idx))
             {
-                case 0: MemSet(param, val); break;
+                case 0:
+                    MemSet(param, val);
+                    break;
                 case 1: throw new Exception("cannot set in immediate mode");
-                case 2: MemSet(relbase + param, val); break;
+                case 2:
+                    MemSet(relbase + param, val);
+                    break;
                 default: throw new Exception("invalid parameter mode");
             }
         }
@@ -94,6 +98,7 @@ namespace aoc2019.lib
             foreach (var s in additionalInput) AddInput(s);
             return Run();
         }
+
         public HaltType Run()
         {
             while (i < memory.Length)
@@ -103,18 +108,22 @@ namespace aoc2019.lib
                 {
                     case 1:
                         Set(3, Get(1) + Get(2));
-                        i += 4; break;
+                        i += 4;
+                        break;
                     case 2:
                         Set(3, Get(1) * Get(2));
-                        i += 4; break;
+                        i += 4;
+                        break;
                     case 3:
                         if (!input.Any())
                             return HaltType.Waiting;
                         Set(1, input.Dequeue());
-                        i += 2; break;
+                        i += 2;
+                        break;
                     case 4:
                         output.Enqueue(Get(1));
-                        i += 2; break;
+                        i += 2;
+                        break;
                     case 5:
                         i = Get(1) == 0 ? i + 3 : Get(2);
                         break;
@@ -123,13 +132,16 @@ namespace aoc2019.lib
                         break;
                     case 7:
                         Set(3, Get(1) < Get(2) ? 1 : 0);
-                        i += 4; break;
+                        i += 4;
+                        break;
                     case 8:
                         Set(3, Get(1) == Get(2) ? 1 : 0);
-                        i += 4; break;
+                        i += 4;
+                        break;
                     case 9:
                         relbase += Get(1);
-                        i += 2; break;
+                        i += 2;
+                        break;
                     case 99:
                         return HaltType.Terminate;
                     default:
@@ -140,4 +152,4 @@ namespace aoc2019.lib
             return HaltType.Terminate;
         }
     }
-}
+}
\ No newline at end of file