[2023] Add Day5 Part1

Signed-off-by: TiagoRG <tiago.rgarcia@ua.pt>

.gitignore

@@ -4,8 +4,8 @@
 ##
 ## Get latest from https://github.com/github/gitignore/blob/main/VisualStudio.gitignore
 
-# Rider configuration directory
-.idea/
+# AdventOfCode input files
+inputs/
 
 # User-specific files
 *.rsuser

AdventOfCode.csproj

@@ -2,7 +2,7 @@
 
     <PropertyGroup>
         <OutputType>Exe</OutputType>
-        <TargetFramework>net7.0</TargetFramework>
+        <TargetFramework>net8.0</TargetFramework>
         <ImplicitUsings>enable</ImplicitUsings>
         <Nullable>enable</Nullable>
     </PropertyGroup>

Makefile

@@ -0,0 +1,6 @@
+.PHONY: build
+
+build:
+	@dotnet build
+	@echo -e "\033c\nAdvent of Code\n\nBy: @TiagoRG\nGitHub: https://github.com/TiagoRG\n\n============================================================="
+	@dotnet run

Program.cs

@@ -1,9 +1,9 @@
-using AdventOfCode.Year2022;
+using AdventOfCode.Year2023;
 
 namespace AdventOfCode;
 
 internal static class Program
 {
     public static void Main(string[] args)
-        => Loader2022.Load();
+        => Loader2023.Load();
 }

README.md

@@ -1,15 +1,25 @@
 # Advent of Code
+
 ## Solutions for the AoC Challenges, all in C#
+
 ### They might not be the best solutions but they work and that's the important part of a coders job :xdd:
 
 ## Solutions organized by year, 1 file per day.
 
 ### [2022](https://github.com/TiagoRG/AdventOfCode/tree/main/AdventOfCode/Year2022)
-* [Day 1](https://github.com/TiagoRG/AdventOfCode/tree/main/AdventOfCode/Year2022/Day1.cs)
-* [Day 2](https://github.com/TiagoRG/AdventOfCode/tree/main/AdventOfCode/Year2022/Day2.cs)
-* [Day 3](https://github.com/TiagoRG/AdventOfCode/tree/main/AdventOfCode/Year2022/Day3.cs)
-* [Day 4](https://github.com/TiagoRG/AdventOfCode/tree/main/AdventOfCode/Year2022/Day4.cs)
-* [Day 6](https://github.com/TiagoRG/AdventOfCode/tree/main/AdventOfCode/Year2022/Day6.cs)
-* [Day 7](https://github.com/TiagoRG/AdventOfCode/tree/main/AdventOfCode/Year2022/Day7.cs)
-* [Day 8](https://github.com/TiagoRG/AdventOfCode/tree/main/AdventOfCode/Year2022/Day8.cs)
-* [Day 9](https://github.com/TiagoRG/AdventOfCode/tree/main/AdventOfCode/Year2022/Day9.cs)
+
+* [Day 1](https://github.com/TiagoRG/AdventOfCode/blob/main/Year2022/Day1.cs)
+* [Day 2](https://github.com/TiagoRG/AdventOfCode/blob/main/Year2022/Day2.cs)
+* [Day 3](https://github.com/TiagoRG/AdventOfCode/blob/main/Year2022/Day3.cs)
+* [Day 4](https://github.com/TiagoRG/AdventOfCode/blob/main/Year2022/Day4.cs)
+* [Day 6](https://github.com/TiagoRG/AdventOfCode/blob/main/Year2022/Day6.cs)
+* [Day 7](https://github.com/TiagoRG/AdventOfCode/blob/main/Year2022/Day7.cs)
+* [Day 8](https://github.com/TiagoRG/AdventOfCode/blob/main/Year2022/Day8.cs)
+* [Day 9](https://github.com/TiagoRG/AdventOfCode/blob/main/Year2022/Day9.cs)
+* [Day 10](https://github.com/TiagoRG/AdventOfCode/blob/main/Year2022/Day10.cs)
+* [Day 11](https://github.com/TiagoRG/AdventOfCode/blob/main/Year2022/Day11.cs)
+* [Day 12](https://github.com/TiagoRG/AdventOfCode/blob/main/Year2022/Day12.cs)
+
+### [2023](https://github.com/TiagoRG/AdventOfCode/tree/main/Year2023)
+
+* [Day 1](https://github.com/TiagoRG/AdventOfCode/blob/main/Year2023/Day1.cs)

Utils/Extensions/LinqExtensions.cs

@@ -11,10 +11,10 @@ public static class LinqExtensions
     /// <returns></returns>
     public static List<T> Sublist<T>(this List<T> list, int startIndex, int endIndex = default)
     {
-        List<T> result = new List<T>();
+        var result = new List<T>();
         if (endIndex == default)
             endIndex = list.Count;
-        for (int i = startIndex; i < endIndex; i++)
+        for (var i = startIndex; i < endIndex; i++)
             result.Add(list[i]);
         return result;
     }
@@ -27,8 +27,8 @@ public static class LinqExtensions
     /// <returns></returns>
     public static List<T> GetColumn<T>(this List<List<T>> list, int column)
     {
-        List<T> result = new List<T>();
-        foreach (List<T> row in list) result.AddRange(row.Where((t, i) => i == column));
+        var result = new List<T>();
+        foreach (var row in list) result.AddRange(row.Where((t, i) => i == column));
         return result;
     }
 
@@ -39,9 +39,9 @@ public static class LinqExtensions
     /// <returns>The reversed list</returns>
     public static List<T> Reversed<T>(this List<T> list)
     {
-        List<T> reversed = new List<T>();
-        for (int i = 0; i < list.Count; i++)
-            reversed.Add(list[list.Count-1-i]);
+        var reversed = new List<T>();
+        for (var i = 0; i < list.Count; i++)
+            reversed.Add(list[list.Count - 1 - i]);
         return reversed;
     }
 
@@ -52,8 +52,8 @@ public static class LinqExtensions
     /// <returns>A copy of the original list</returns>
     public static List<T> Clone<T>(this List<T> original)
     {
-        List<T> ret = new List<T>(original.Count);
-        foreach (T element in original)
+        var ret = new List<T>(original.Count);
+        foreach (var element in original)
             ret.Add(element);
         return ret;
     }
@@ -63,9 +63,9 @@ public static class LinqExtensions
         where TValue : ICloneable
         where TKey : notnull
     {
-        Dictionary<TKey, TValue> ret = new Dictionary<TKey, TValue>(original.Count, original.Comparer);
-        foreach (KeyValuePair<TKey, TValue> entry in original)
-            ret.Add(entry.Key, (TValue) entry.Value.Clone());
+        var ret = new Dictionary<TKey, TValue>(original.Count, original.Comparer);
+        foreach (var entry in original)
+            ret.Add(entry.Key, (TValue)entry.Value.Clone());
         return ret;
     }
 
@@ -73,8 +73,8 @@ public static class LinqExtensions
         (this Dictionary<TKey, List<TValue>> original)
         where TKey : notnull
     {
-        Dictionary<TKey, List<TValue>> ret = new Dictionary<TKey, List<TValue>>(original.Count, original.Comparer);
-        foreach (KeyValuePair<TKey, List<TValue>> entry in original)
+        var ret = new Dictionary<TKey, List<TValue>>(original.Count, original.Comparer);
+        foreach (var entry in original)
             ret.Add(entry.Key, entry.Value.Clone());
         return ret;
     }
@@ -82,20 +82,20 @@ public static class LinqExtensions
     public static void Fill<T>(this List<T> list, int count, T element)
         where T : ICloneable
     {
-        for (int i = 0; i < count; i++)
+        for (var i = 0; i < count; i++)
             list.Add(element);
     }
 
     public static void Fill<T>(this List<List<T>> list, int count, List<T> element)
     {
-        for (int i = 0; i < count; i++)
+        for (var i = 0; i < count; i++)
             list.Add(element.Clone());
     }
 
     public static void Set<T>(this List<T> list, int index, T element)
     {
-        List<T> backup = list.Clone();
+        var backup = list.Clone();
         list.Clear();
-        for (int i = 0; i < list.Count; i++) list.Add(i == index ? element : list[i]);
+        for (var i = 0; i < list.Count; i++) list.Add(i == index ? element : list[i]);
     }
 }

Utils/Extensions/MathExtensions.cs

@@ -18,7 +18,7 @@ public static class MathExtensions
         {
             Convert.ToInt32(s);
         }
-        catch (FormatException ignored)
+        catch (FormatException)
         {
             return false;
         }
@@ -28,30 +28,32 @@ public static class MathExtensions
 
     public static ulong ProductOfMax(this List<ulong> list, int maxCount)
     {
-        List<ulong> maxList = new List<ulong>(maxCount);
+        var maxList = new List<ulong>(maxCount);
 
-        foreach (ulong number in list)
+        foreach (var number in list)
         {
             if (maxList.Count < maxList.Capacity)
+            {
                 maxList.Add(number);
-            else
-            if (number > maxList.Min())
+            }
+            else if (number > maxList.Min())
             {
                 maxList.RemoveAt(0);
                 maxList.Add(number);
             }
+
             maxList.Sort();
         }
 
         ulong product = 1;
-        maxList.ForEach(n => product*=n);
+        maxList.ForEach(n => product *= n);
         return product;
     }
 
     public static int LeastCommonMultiplier(this List<int> list)
     {
-        int lcm = 1;
-        foreach (int i in list)
+        var lcm = 1;
+        foreach (var i in list)
             lcm *= i / MathTools.GreatCommonDivider(lcm, i);
         return lcm;
     }

Year2022/Day1.cs

@@ -6,10 +6,12 @@ public class Day1
 
     public Day1()
     {
-        Console.WriteLine("\nDay1 Solution");
-        Console.WriteLine($"Part1 Result: {Part1()}");
-        Console.WriteLine($"Part2 Result: {Part2()}");
-        Console.WriteLine("\n=============================\n");
+        Console.WriteLine($@"
+Day1 Solution
+Part1 Result: {Part1()}
+Part2 Result: {Part2()}
+
+=============================");
     }
 
     private static int Part1()
@@ -19,30 +21,21 @@ public class Day1
 
     private static int Part2()
     {
-        List<int> top3 = new List<int>();
-        for (int i = 0; i < 3; i++)
-        {
-            top3.Add(CaloriesPerElf.Max());
-            CaloriesPerElf.Remove(CaloriesPerElf.Max());
-        }
-
-        return top3.Sum();
+        return CaloriesPerElf.Order().Reverse().ToArray()[..3].Sum();
     }
 
     private static List<int> GetCaloriesPerElf()
     {
-        string[] calories = File.ReadAllLines("inputs/day1.txt");
-        int[] caloriesPerDay = new int[calories.Length];
+        var calories = File.ReadAllLines("inputs/day1.txt");
+        var caloriesPerDay = new int[calories.Length];
         var index = 0;
-        foreach (string calorie in calories)
-        {
+        foreach (var calorie in calories)
             if (calorie == "")
                 index++;
             else
                 caloriesPerDay[index] += Convert.ToInt32(calorie);
-        }
 
-        int elfCount = caloriesPerDay.ToList().IndexOf(0);
+        var elfCount = caloriesPerDay.ToList().IndexOf(0);
         return caloriesPerDay.ToList().GetRange(0, elfCount);
     }
 }

Year2022/Day10.cs

@@ -1,42 +1,43 @@
-using AdventOfCode.Utils;
-
 namespace AdventOfCode.Year2022;
 
 public class Day10
 {
     private static readonly List<string> CommandsList = new();
+
     public Day10()
     {
-        Console.WriteLine("Day10 Solution");
         File.ReadAllLines("inputs/day10.txt").ToList().ForEach(line => CommandsList.Add(line));
-        
-        Console.WriteLine($"Part1 Result: {Part1()}");
-        Console.WriteLine($"Part2 Result: {Part2()}");
-        Console.WriteLine("\n=============================\n");
+        Console.WriteLine($@"
+Day10 Solution
+Part1 Result: {Part1()}
+Part2 Result: {Part2()}
+=============================");
     }
 
     private static int Part1()
     {
-        int sum = 0;
-        int currentPower = 1;
+        var sum = 0;
+        var currentPower = 1;
 
-        int listIndex = 0;
-        int addPower = 0;
-        int skipCycles = 0;
+        var listIndex = 0;
+        var addPower = 0;
+        var skipCycles = 0;
 
-        for (int cycle = 1; cycle <= 220; cycle++)
+        for (var cycle = 1; cycle <= 220; cycle++)
         {
             if (skipCycles == 0)
             {
                 currentPower += addPower;
-                string line = CommandsList[listIndex];
-                string cmd = line.Substring(0, 4);
+                var line = CommandsList[listIndex];
+                var cmd = line.Substring(0, 4);
                 skipCycles = cmd == "noop" ? 0 : 1;
                 addPower = cmd == "noop" ? 0 : Convert.ToInt32(line.Split(" ")[1]);
                 listIndex++;
             }
             else
+            {
                 skipCycles--;
+            }
 
             if ((cycle - 20) % 40 == 0)
                 sum += currentPower * cycle;
@@ -47,37 +48,39 @@ public class Day10
 
     private static string Part2()
     {
-        char[] crt = new char[40*6];
-        int registerPos = 0;
+        var crt = new char[40 * 6];
+        var registerPos = 0;
 
-        int listIndex = 0;
-        int movePos = 0;
-        int skipCycles = 0;
+        var listIndex = 0;
+        var movePos = 0;
+        var skipCycles = 0;
 
-        for (int cycle = 0; cycle < 240; cycle++)
+        for (var cycle = 0; cycle < 240; cycle++)
         {
             if (skipCycles == 0)
             {
                 registerPos += movePos;
-                string line = CommandsList[listIndex];
-                string cmd = line[..4];
+                var line = CommandsList[listIndex];
+                var cmd = line[..4];
                 skipCycles = cmd == "noop" ? 0 : 1;
                 movePos = cmd == "noop" ? 0 : Convert.ToInt32(line.Split(" ")[1]);
                 listIndex++;
             }
             else
+            {
                 skipCycles--;
-
-            char[] sprite = CreateSprite(registerPos);
-            crt[cycle] = sprite[cycle%40];
             }
 
-        string result = "\n";
-        int charI = 0;
+            var sprite = CreateSprite(registerPos);
+            crt[cycle] = sprite[cycle % 40];
+        }
+
+        var result = "\n";
+        var charI = 0;
         crt.ToList().ForEach(c =>
         {
             result += c.ToString();
-            if ((charI+1)%40==0)
+            if ((charI + 1) % 40 == 0)
                 result += "\n";
             charI++;
         });
@@ -86,9 +89,9 @@ public class Day10
 
     private static char[] CreateSprite(int registerPos)
     {
-        char[] result = new char[40];
-        for (int i = 0; i < 40; i++)
-            result[i] = i > registerPos-1 && i < registerPos+3 ? '#' : '.';
+        var result = new char[40];
+        for (var i = 0; i < 40; i++)
+            result[i] = i > registerPos - 1 && i < registerPos + 3 ? '#' : ' ';
         return result;
     }
 }

Year2022/Day11.cs

@@ -0,0 +1,175 @@
+using AdventOfCode.Utils.Extensions;
+
+namespace AdventOfCode.Year2022;
+
+public class Day11
+{
+    private static readonly List<Monkey> Part1Monkeys = new();
+    private static readonly List<Monkey> Part2Monkeys = new();
+
+    public Day11()
+    {
+        File.ReadAllText("inputs/day11.txt").Split("\n\n").ToList().ForEach(monkey =>
+        {
+            var lines = monkey.Split("\n");
+
+            // Getting starting items
+            var items1 = new List<Item>();
+            var items2 = new List<Item>();
+            lines[1][(lines[1].IndexOf(':') + 2)..].Split(", ").ToList().ForEach(item =>
+            {
+                items1.Add(new Item(Convert.ToInt32(item)));
+                items2.Add(new Item(Convert.ToInt32(item)));
+            });
+
+            // Getting operation
+            var op = lines[2][19..];
+
+            // Getting test info
+            var test = Convert.ToInt32(lines[3][21..]);
+            var testMonkeys = (Convert.ToInt32(lines[4][29..]), Convert.ToInt32(lines[5][30..]));
+
+            Part1Monkeys.Add(new Monkey(items1, op, test, testMonkeys));
+            Part2Monkeys.Add(new Monkey(items2, op, test, testMonkeys));
+        });
+        Console.WriteLine($@"
+Day11 Solution
+Part1 Result: {Part1()}
+Part2 Result: {Part2()}
+
+=============================");
+    }
+
+    private static ulong Part1()
+    {
+        var inspections = new ulong[Part1Monkeys.Count];
+
+        for (var round = 0; round < 20; round++)
+            foreach (var monkey in Part1Monkeys)
+            {
+                foreach (var item in monkey.Items)
+                {
+                    if (monkey.Operation.Contains('+'))
+                        item.Value += Convert.ToInt32(monkey.Operation.Split(" ").Last());
+                    else if (monkey.Operation == "old * old")
+                        item.Value *= item.Value;
+                    else
+                        item.Value *= Convert.ToInt32(monkey.Operation.Split(" ").Last());
+                    item.Value /= 3;
+                    Part1Monkeys[
+                        item.Value % monkey.DivisionTest == 0
+                            ? monkey.TestMonkeys.Item1
+                            : monkey.TestMonkeys.Item2
+                    ].Items.Add(item);
+                    inspections[Part1Monkeys.IndexOf(monkey)]++;
+                }
+
+                monkey.Items.Clear();
+            }
+
+        return new List<ulong>(inspections).ProductOfMax(2);
+    }
+
+    private static ulong Part2()
+    {
+        for (double round = 0; round < 10000; round++)
+            foreach (var monkey in Part2Monkeys)
+            {
+                monkey.UpdateItems();
+                var receiversAndItems = monkey.GetReceiversAndItems();
+                foreach (var key in receiversAndItems.Keys)
+                    Part2Monkeys[key].ReceiveItems(receiversAndItems[key]);
+            }
+
+        var topMonkeys = new List<ulong>();
+        Part2Monkeys.ForEach(monkey => topMonkeys.Add((ulong)monkey.TotalItemsChecked));
+        return topMonkeys.ProductOfMax(2);
+    }
+
+    private class Monkey
+    {
+        public Monkey(List<Item> items, string operation, int divisionTest, (int, int) testMonkeys)
+        {
+            Items = items;
+            Operation = operation;
+            DivisionTest = divisionTest;
+            TestMonkeys = testMonkeys;
+            TotalItemsChecked = 0;
+        }
+
+        public List<Item> Items { get; private set; }
+        public string Operation { get; }
+        public int DivisionTest { get; }
+        public (int, int) TestMonkeys { get; }
+        public int TotalItemsChecked { get; private set; }
+
+        public void UpdateItems()
+        {
+            if (Operation.Contains('+'))
+                foreach (var item in Items)
+                    item.UpdateDivisibleBy(Operator.Add, Convert.ToInt32(Operation.Split(" ").Last()));
+            else if (Operation == "old * old")
+                foreach (var item in Items)
+                    item.UpdateDivisibleBy(Operator.Square);
+            else
+                foreach (var item in Items)
+                    item.UpdateDivisibleBy(Operator.Multiply, Convert.ToInt32(Operation.Split(" ").Last()));
+            TotalItemsChecked += Items.Count;
+        }
+
+        public Dictionary<int, List<Item>> GetReceiversAndItems()
+        {
+            var result = new Dictionary<int, List<Item>>
+            {
+                [TestMonkeys.Item1] = new(),
+                [TestMonkeys.Item2] = new()
+            };
+            Items.ForEach(item =>
+            {
+                if (item.DivisibleBy[DivisionTest] == 0)
+                    result[TestMonkeys.Item1].Add(item);
+                else
+                    result[TestMonkeys.Item2].Add(item);
+            });
+            Items = new List<Item>();
+            return result;
+        }
+
+        public void ReceiveItems(List<Item> items)
+        {
+            Items.AddRange(items);
+        }
+    }
+
+    private class Item
+    {
+        public Item(int value)
+        {
+            Value = value;
+            foreach (var i in new[] { 2, 3, 5, 7, 11, 13, 17, 19, 23 })
+                DivisibleBy.Add(i, value % i);
+        }
+
+        public int Value { get; set; }
+        public Dictionary<int, int> DivisibleBy { get; } = new();
+
+        public void UpdateDivisibleBy(Operator op, int value = default)
+        {
+            foreach (var key in DivisibleBy.Keys)
+                DivisibleBy[key] = op switch
+                {
+                    Operator.Add => (DivisibleBy[key] + value) % key,
+                    Operator.Multiply => DivisibleBy[key] * value % key,
+                    Operator.Square => DivisibleBy[key] * DivisibleBy[key] % key,
+                    _ => throw new ArgumentOutOfRangeException(nameof(op), op, null)
+                };
+        }
+    }
+
+    private enum Operator
+    {
+        Add,
+        Multiply,
+        Square
+    }
+}

Year2022/Day12.cs

@@ -0,0 +1,193 @@
+namespace AdventOfCode.Year2022;
+
+public class Day12
+{
+    private const int SOrd = -14;
+    private const int EOrd = -28;
+    private static short[,]? _map;
+    private static (int, int) _sCoords;
+    private static (int, int) _eCoords;
+
+    /// <summary>
+    ///     Slowest solution so far.
+    ///     Could most certainly use some improvements :skull:
+    /// </summary>
+    public Day12()
+    {
+        Console.WriteLine($@"
+Day12 Solution
+Part1 Result: {Part1()}
+Part2 Result: {Part2()}
+
+=============================");
+    }
+
+    private static void PartInit()
+    {
+        var lines = File.ReadAllLines("inputs/day12.txt");
+        var map = new short[lines.Length, lines[0].Length];
+
+        for (var i = 0; i < lines.Length; i++)
+        for (var j = 0; j < lines[i].Length; j++)
+            map[i, j] = (short)(Convert.ToInt16(lines[i][j]) - 97);
+
+        _map = map;
+        _sCoords = FindCoords(map, SOrd);
+        _eCoords = FindCoords(map, EOrd);
+    }
+
+    private static int Part1()
+    {
+        PartInit();
+        var distances = GetIndexes(_map!).Where(item => item != _sCoords)
+            .ToDictionary(index => (index.Item1, index.Item2), _ => short.MaxValue);
+        distances[(_sCoords.Item1, _sCoords.Item2)] = 0;
+
+        _map![_sCoords.Item1, _sCoords.Item2] = 0;
+        _map[_eCoords.Item1, _eCoords.Item2] = (short)(Convert.ToInt16('z') - 97);
+
+        var visited = new List<(int, int)>();
+        var current = _sCoords;
+        var unvisited = GetIndexes(_map).ToList();
+
+        while (true)
+            try
+            {
+                Dijkstra(current, distances, visited, Part.Part1);
+                unvisited.Remove(current);
+                current = distances.Where(pair => unvisited.Contains(pair.Key)).MinBy(pair => pair.Value).Key;
+            }
+            catch (InvalidOperationException)
+            {
+                return distances[_eCoords];
+            }
+    }
+
+    private static int Part2()
+    {
+        PartInit();
+        var distances = GetIndexes(_map!).ToDictionary(index => (index.Item1, index.Item2), _ => short.MaxValue);
+        distances[(_eCoords.Item1, _eCoords.Item2)] = 0;
+
+        _map![_sCoords.Item1, _sCoords.Item2] = 0;
+        _map[_eCoords.Item1, _eCoords.Item2] = (short)(Convert.ToInt16('z') - 97);
+
+        var visited = new List<(int, int)>();
+        var current = _eCoords;
+        var unvisited = GetIndexes(_map).ToList();
+        var aIndexes = FindAllCoords(_map, 0).ToList();
+
+        while (true)
+        {
+            if (aIndexes.Contains(Dijkstra(current, distances, visited, Part.Part2)))
+                return distances.Where(pair => aIndexes.Contains(pair.Key)).Min(pair => pair.Value);
+            unvisited.Remove(current);
+            current = distances.Where(pair => unvisited.Contains(pair.Key)).MinBy(pair => pair.Value).Key;
+        }
+    }
+
+    private static (int, int) Dijkstra((int, int) current, IDictionary<(int, int), short> distances,
+        ICollection<(int, int)> visited, Part part)
+    {
+        var nextCoords = new Dictionary<char, (int, int)>
+        {
+            ['D'] = (current.Item1 + 1, current.Item2),
+            ['U'] = (current.Item1 - 1, current.Item2),
+            ['R'] = (current.Item1, current.Item2 + 1),
+            ['L'] = (current.Item1, current.Item2 - 1)
+        };
+
+        if (current.Item1 < _map!.GetLength(0) - 1
+            && IsStepPossible(current, nextCoords['D'], part)
+            && !visited.Contains(nextCoords['D']))
+            UpdateDistances(distances, current, nextCoords['D']);
+
+        if (current.Item1 > 0
+            && IsStepPossible(current, nextCoords['U'], part)
+            && !visited.Contains(nextCoords['U']))
+            UpdateDistances(distances, current, nextCoords['U']);
+
+        if (current.Item2 < _map.GetLength(1) - 1
+            && IsStepPossible(current, nextCoords['R'], part)
+            && !visited.Contains(nextCoords['R']))
+            UpdateDistances(distances, current, nextCoords['R']);
+
+        if (current.Item2 > 0
+            && IsStepPossible(current, nextCoords['L'], part)
+            && !visited.Contains(nextCoords['L']))
+            UpdateDistances(distances, current, nextCoords['L']);
+
+        visited.Add(current);
+        return current;
+    }
+
+    private static bool IsStepPossible((int, int) currentCoords, (int, int) nextCoord, Part part)
+    {
+        return part switch
+        {
+            Part.Part1 => _map![nextCoord.Item1, nextCoord.Item2] - 1 <= _map[currentCoords.Item1, currentCoords.Item2],
+            Part.Part2 => _map![nextCoord.Item1, nextCoord.Item2] + 1 >= _map[currentCoords.Item1, currentCoords.Item2],
+            _ => throw new ArgumentOutOfRangeException(nameof(part), part, null)
+        };
+    }
+
+    private static void UpdateDistances(IDictionary<(int, int), short> distances, (int, int) currentCoords,
+        (int, int) nextCoords)
+    {
+        if (distances[(nextCoords.Item1, nextCoords.Item2)] == short.MaxValue ||
+            distances[(nextCoords.Item1, nextCoords.Item2)] > distances[(currentCoords.Item1, currentCoords.Item2)])
+            distances[(nextCoords.Item1, nextCoords.Item2)] =
+                (short)(distances[(currentCoords.Item1, currentCoords.Item2)] + 1);
+    }
+
+    /// <summary>
+    ///     Finds the first occurrence of a value in a 2D array
+    /// </summary>
+    /// <param name="array">The 2D array</param>
+    /// <param name="value">The value to be found</param>
+    /// <returns></returns>
+    /// <exception cref="ArgumentNullException">Array can't be null</exception>
+    private static (int, int) FindCoords(short[,] array, int value)
+    {
+        if (array == null) throw new ArgumentNullException(nameof(array));
+        foreach (var index in GetIndexes(array))
+            if (array[index.Item1, index.Item2] == value)
+                return (index.Item1, index.Item2);
+        return (-1, -1);
+    }
+
+    /// <summary>
+    ///     Finds all coordinates of a value in a 2D array
+    /// </summary>
+    /// <param name="array">The 2D array</param>
+    /// <param name="value">The value to be found</param>
+    /// <returns></returns>
+    /// <exception cref="ArgumentNullException">Array can't be null</exception>
+    private static IEnumerable<(int, int)> FindAllCoords(short[,] array, int value)
+    {
+        if (array == null) throw new ArgumentNullException(nameof(array));
+        return from index in GetIndexes(array)
+            where array[index.Item1, index.Item2] == value
+            select (index.Item1, index.Item2);
+    }
+
+    /// <summary>
+    ///     Returns an enumerable of all indexes of a 2D array
+    /// </summary>
+    /// <param name="array">The 2D array</param>
+    /// <returns></returns>
+    /// <exception cref="ArgumentNullException">Array can't be null</exception>
+    private static IEnumerable<(int, int)> GetIndexes(short[,] array)
+    {
+        if (array == null) throw new ArgumentNullException(nameof(array));
+        for (var i = 0; i < array.GetLength(0); i++)
+        for (var j = 0; j < array.GetLength(1); j++)
+            yield return (i, j);
+    }
+
+    private enum Part
+    {
+        Part1,
+        Part2
+    }
+}

Year2022/Day2.cs

@@ -6,16 +6,18 @@ public class Day2
 
     public Day2()
     {
-        Console.WriteLine("Day2 Solution");
-        Console.WriteLine($"Part1 Result: {Part1()}");
-        Console.WriteLine($"Part2 Result: {Part2()}");
-        Console.WriteLine("\n=============================\n");
+        Console.WriteLine($@"
+Day2 Solution
+Part1 Result: {Part1()}
+Part2 Result: {Part2()}
+
+=============================");
     }
 
     private static int Part1()
     {
-        int score = 0;
-        foreach (string[] match in Matches)
+        var score = 0;
+        foreach (var match in Matches)
         {
             if (match[0] == "A")
             {
@@ -26,6 +28,7 @@ public class Day2
                 if (match[1] == "Z")
                     score += 3;
             }
+
             if (match[0] == "B")
             {
                 if (match[1] == "X")
@@ -35,6 +38,7 @@ public class Day2
                 if (match[1] == "Z")
                     score += 3 + 6;
             }
+
             if (match[0] == "C")
             {
                 if (match[1] == "X")
@@ -51,8 +55,8 @@ public class Day2
 
     private static int Part2()
     {
-        int score = 0;
-        foreach (string[] match in Matches)
+        var score = 0;
+        foreach (var match in Matches)
         {
             if (match[0] == "A")
             {
@@ -63,6 +67,7 @@ public class Day2
                 if (match[1] == "Z")
                     score += 2 + 6;
             }
+
             if (match[0] == "B")
             {
                 if (match[1] == "X")
@@ -72,6 +77,7 @@ public class Day2
                 if (match[1] == "Z")
                     score += 3 + 6;
             }
+
             if (match[0] == "C")
             {
                 if (match[1] == "X")
@@ -88,8 +94,8 @@ public class Day2
 
     private static List<string[]> LoadMatches()
     {
-        List<string[]> matches = new List<string[]>();
-        foreach (string line in File.ReadAllLines("inputs/day2.txt"))
+        var matches = new List<string[]>();
+        foreach (var line in File.ReadAllLines("inputs/day2.txt"))
             matches.Add(line.Split(" "));
         return matches;
     }

Year2022/Day3.cs

@@ -6,55 +6,54 @@ public class Day3
 
     public Day3()
     {
-        Console.WriteLine("Day3 Solution");
-        Console.WriteLine($"Part1 Result: {Part1()}");
-        Console.WriteLine($"Part2 Result: {Part2()}");
-        Console.WriteLine("\n=============================\n");
+        Console.WriteLine($@"
+Day3 Solution
+Part1 Result: {Part1()}
+Part2 Result: {Part2()}
+
+=============================");
     }
 
     private static int Part1()
     {
-        int sum = 0;
+        var sum = 0;
 
-        List<char> duplicates = new List<char>();
+        var duplicates = new List<char>();
 
-        foreach (string backpack in Backpacks)
+        foreach (var backpack in Backpacks)
         {
-            int compartmentSize = backpack.Length / 2;
-            List<char> itemsInCompartment1 = new List<char>();
-            List<char> itemsInCompartment2 = new List<char>();
+            var compartmentSize = backpack.Length / 2;
+            var itemsInCompartment1 = new List<char>();
+            var itemsInCompartment2 = new List<char>();
 
-            for (int i = 0; i < compartmentSize; i++)
+            for (var i = 0; i < compartmentSize; i++)
                 itemsInCompartment1.Add(backpack[i]);
-            for (int i = compartmentSize; i < compartmentSize * 2; i++)
+            for (var i = compartmentSize; i < compartmentSize * 2; i++)
                 itemsInCompartment2.Add(backpack[i]);
 
-            char duplicatedItem = itemsInCompartment1.Intersect(itemsInCompartment2).FirstOrDefault();
+            var duplicatedItem = itemsInCompartment1.Intersect(itemsInCompartment2).FirstOrDefault();
             duplicates.Add(duplicatedItem);
         }
 
-        foreach (char duplicate in duplicates)
-        {
-            if (Char.IsUpper(duplicate))
+        foreach (var duplicate in duplicates)
+            if (char.IsUpper(duplicate))
                 sum += Convert.ToInt16(duplicate) - 38;
             else
                 sum += Convert.ToInt16(duplicate) - 96;
-        }
 
         return sum;
     }
 
     private static int Part2()
     {
-        int sum = 0;
-        List<List<string>> groups = new List<List<string>>();
+        var sum = 0;
+        var groups = new List<List<string>>();
 
-        for (int i = 0; i < Backpacks.Length; i+=3)
+        for (var i = 0; i < Backpacks.Length; i += 3)
         {
-            List<string> group = new List<string>();
+            var group = new List<string>();
 
-            for (int x = 0; x < 3; x++)
-            {
+            for (var x = 0; x < 3; x++)
                 try
                 {
                     group.Add(Backpacks[i + x]);
@@ -63,26 +62,23 @@ public class Day3
                 {
                     break;
                 }
-            }
 
             if (group.All(x => x != ""))
                 groups.Add(group);
         }
 
-        List<char> duplicates = new List<char>();
-        foreach (List<string> group in groups)
+        var duplicates = new List<char>();
+        foreach (var group in groups)
         {
-            string[] groupArray = group.ToArray();
+            var groupArray = group.ToArray();
             duplicates.Add(groupArray[0].Intersect(groupArray[1].Intersect(groupArray[2])).FirstOrDefault());
         }
 
-        foreach (char duplicate in duplicates)
-        {
-            if (Char.IsUpper(duplicate))
+        foreach (var duplicate in duplicates)
+            if (char.IsUpper(duplicate))
                 sum += Convert.ToInt16(duplicate) - 38;
             else
                 sum += Convert.ToInt16(duplicate) - 96;
-        }
 
         return sum;
     }

Year2022/Day4.cs

@@ -4,12 +4,10 @@ public class Day4
 {
     public Day4()
     {
-        Console.WriteLine("Day4 Solution");
-
-        string[] lines = File.ReadAllLines("inputs/day4.txt");
-        int containedCount = 0;
-        int intersectedCount = 0;
-        foreach (string line in lines)
+        var lines = File.ReadAllLines("inputs/day4.txt");
+        var containedCount = 0;
+        var intersectedCount = 0;
+        foreach (var line in lines)
         {
             if (IsContained(line))
                 containedCount++;
@@ -17,34 +15,37 @@ public class Day4
                 intersectedCount++;
         }
 
-        Console.WriteLine($"Part1 Result: {containedCount}");
-        Console.WriteLine($"Part2 Result: {intersectedCount}");
-        Console.WriteLine("\n=============================\n");
+        Console.WriteLine($@"
+Day4 Solution
+Part1 Result: {containedCount}
+Part2 Result: {intersectedCount}
+
+=============================");
     }
 
     private static bool IsContained(string line)
     {
-        int[][] limits = GetLimits(line);
+        var limits = GetLimits(line);
         return (limits[0][0] >= limits[1][0] && limits[0][1] <= limits[1][1])
                || (limits[1][0] >= limits[0][0] && limits[1][1] <= limits[0][1]);
     }
 
     private static bool IsIntersected(string line)
     {
-        int[][] limits = GetLimits(line);
+        var limits = GetLimits(line);
         return (limits[0][1] >= limits[1][0] && limits[0][0] <= limits[1][1])
                || (limits[1][1] >= limits[0][0] && limits[1][0] <= limits[0][1]);
     }
 
     private static int[][] GetLimits(string line)
     {
-        string[] pair = line.Split(",");
-        string[] pair1 = pair[0].Split("-");
-        string[] pair2 = pair[1].Split("-");
-        return new []
+        var pair = line.Split(",");
+        var pair1 = pair[0].Split("-");
+        var pair2 = pair[1].Split("-");
+        return new[]
         {
-            new [] {Convert.ToInt32(pair1[0]), Convert.ToInt32(pair1[1])},
-            new [] {Convert.ToInt32(pair2[0]), Convert.ToInt32(pair2[1])}
+            new[] { Convert.ToInt32(pair1[0]), Convert.ToInt32(pair1[1]) },
+            new[] { Convert.ToInt32(pair2[0]), Convert.ToInt32(pair2[1]) }
         };
     }
 }

Year2022/Day5.cs

@@ -6,59 +6,59 @@ public class Day5
 {
     private static readonly Dictionary<int, List<char>> Crates = new()
     {
-        [1] = new(),
-        [2] = new(),
-        [3] = new(),
-        [4] = new(),
-        [5] = new(),
-        [6] = new(),
-        [7] = new(),
-        [8] = new(),
-        [9] = new()
+        [1] = new List<char>(),
+        [2] = new List<char>(),
+        [3] = new List<char>(),
+        [4] = new List<char>(),
+        [5] = new List<char>(),
+        [6] = new List<char>(),
+        [7] = new List<char>(),
+        [8] = new List<char>(),
+        [9] = new List<char>()
     };
 
     private static readonly List<(int, int, int)> Moves = new();
 
     public Day5()
     {
-        Console.WriteLine("Day5 Solution");
-
-        string[] input = File.ReadAllText("inputs/day5.txt").Split("\n\n");
+        var input = File.ReadAllText("inputs/day5.txt").Split("\n\n");
         LoadCrates(input[0]);
         LoadMoves(input[1]);
+        Console.WriteLine($@"
+Day5 Solution
+Part1 Result: {Parts(Part.Part1)}
+Part2 Result: {Parts(Part.Part2)}
 
-        Console.WriteLine($"Part1 Result: {Parts(Part.Part1)}");
-        Console.WriteLine($"Part2 Result: {Parts(Part.Part2)}");
-        Console.WriteLine("\n=============================\n");
+=============================");
     }
 
     private static string Parts(Part part)
     {
-        Dictionary<int, List<char>> crates = Crates.Clone();
-        foreach ((int, int, int) move in Moves)
+        var crates = Crates.Clone();
+        foreach (var move in Moves)
         {
-            List<char> cratesMoved = crates[move.Item2].Sublist(0, move.Item1);
-            for (int i = 0; i < move.Item1; i++)
+            var cratesMoved = crates[move.Item2].Sublist(0, move.Item1);
+            for (var i = 0; i < move.Item1; i++)
                 crates[move.Item2].Remove(crates[move.Item2][0]);
-            foreach (char crate in part == Part.Part1 ? cratesMoved : cratesMoved.Reversed())
+            foreach (var crate in part == Part.Part1 ? cratesMoved : cratesMoved.Reversed())
                 crates[move.Item3].Insert(0, crate);
         }
 
-        string result = "";
-        foreach (List<char> crateList in crates.Values)
+        var result = "";
+        foreach (var crateList in crates.Values)
             result += crateList[0];
         return result;
     }
 
     private static void LoadCrates(string crates)
     {
-        string[] crate_lines = crates.Split("\n");
-        foreach (string line in crate_lines)
+        var crate_lines = crates.Split("\n");
+        foreach (var line in crate_lines)
         {
-            int firstCrate = 0;
+            var firstCrate = 0;
             if (line[firstCrate] == '[')
                 Crates[1].Add(line[1]);
-            while (line.Substring(firstCrate+1).Contains('['))
+            while (line.Substring(firstCrate + 1).Contains('['))
             {
                 firstCrate = line.IndexOf('[', firstCrate + 1);
                 Crates[firstCrate / 4 + 1].Add(line[firstCrate + 1]);
@@ -68,18 +68,19 @@ public class Day5
 
     private static void LoadMoves(string moves)
     {
-        string[] move_lines = moves.Split("\n");
-        foreach (string line in move_lines)
+        var move_lines = moves.Split("\n");
+        foreach (var line in move_lines)
         {
-            string move = line.Substring(5);
-            string[] moved = move.Split(" from ");
-            string[] crates = moved[1].Split(" to ");
+            var move = line.Substring(5);
+            var moved = move.Split(" from ");
+            var crates = moved[1].Split(" to ");
             Moves.Add((Convert.ToInt32(moved[0]), Convert.ToInt32(crates[0]), Convert.ToInt32(crates[1])));
         }
     }
 
     private enum Part
     {
-        Part1, Part2
+        Part1,
+        Part2
     }
 }

Year2022/Day6.cs

@@ -6,15 +6,17 @@ public class Day6
 
     public Day6()
     {
-        Console.WriteLine("Day6 Solution");
-        Console.WriteLine($"Part1 Result: {GetValidMarkerIndex(4)}");
-        Console.WriteLine($"Part2 Result: {GetValidMarkerIndex(14)}");
-        Console.WriteLine("\n=============================\n");
+        Console.WriteLine($@"
+Day6 Solution
+Part1 Result: {GetValidMarkerIndex(4)}
+Part2 Result: {GetValidMarkerIndex(14)}
+
+=============================");
     }
 
     private static int? GetValidMarkerIndex(int size)
     {
-        for (int i = 0; i < Input.Length-size; i++)
+        for (var i = 0; i < Input.Length - size; i++)
             if (ValidateMarker(Input.Substring(i, size)))
                 return i + size;
         return null;

Year2022/Day7.cs

@@ -6,18 +6,20 @@ public class Day7
 
     public Day7()
     {
-        Console.WriteLine("Day7 Solution");
-        Console.WriteLine($"Part1 Result: {Part1()}");
-        Console.WriteLine($"Part2 Result: {Part2()}");
-        Console.WriteLine("\n=============================\n");
+        Console.WriteLine($@"
+Day7 Solution
+Part1 Result: {Part1()}
+Part2 Result: {Part2()}
+
+=============================");
     }
 
     private static int Part1()
     {
-        int sum = 0;
-        foreach (string path in Tree.Keys)
+        var sum = 0;
+        foreach (var path in Tree.Keys)
         {
-            int size = CalculateDirSize(path);
+            var size = CalculateDirSize(path);
             if (size <= 100000)
                 sum += size;
         }
@@ -27,16 +29,13 @@ public class Day7
 
     private static int Part2()
     {
-        int neededSpace = CalculateDirSize("/") - 40000000;
-        if (neededSpace <= 0)
-        {
-            return 0;
-        }
+        var neededSpace = CalculateDirSize("/") - 40000000;
+        if (neededSpace <= 0) return 0;
 
-        List<int> bigEnoughDir = new List<int>();
-        foreach (string path in Tree.Keys)
+        var bigEnoughDir = new List<int>();
+        foreach (var path in Tree.Keys)
         {
-            int size = CalculateDirSize(path);
+            var size = CalculateDirSize(path);
             if (size > neededSpace)
                 bigEnoughDir.Add(size);
         }
@@ -47,11 +46,11 @@ public class Day7
 
     private static int CalculateDirSize(string path)
     {
-        int size = 0;
-        List<string> dirContent = Tree[path];
-        foreach (string content in dirContent)
+        var size = 0;
+        var dirContent = Tree[path];
+        foreach (var content in dirContent)
         {
-            string[] properties = content.Split(" ");
+            var properties = content.Split(" ");
             if (properties[0] == "dir")
                 size += CalculateDirSize(path + properties[1] + "/");
             else
@@ -63,39 +62,41 @@ public class Day7
 
     private static Dictionary<string, List<string>> GetTree()
     {
-        Dictionary<string, List<string>> tree = new Dictionary<string, List<string>>();
-        string currentPath = "";
+        var tree = new Dictionary<string, List<string>>();
+        var currentPath = "";
 
-        IEnumerable<string> input = File.ReadLines("inputs/day7.txt");
-        foreach (string line in input)
-        {
+        var input = File.ReadLines("inputs/day7.txt");
+        foreach (var line in input)
             if (line.StartsWith("$"))
             {
-                string[] cmdLine = line.Substring(2).Split(" ");
+                var cmdLine = line.Substring(2).Split(" ");
                 if (cmdLine[0] == "cd")
                 {
-                    string dir = cmdLine[1];
+                    var dir = cmdLine[1];
                     if (dir == "/")
+                    {
                         currentPath = "/";
+                    }
                     else if (dir == "..")
                     {
                         if (currentPath == "/") continue;
-                        int slashIndex = currentPath
+                        var slashIndex = currentPath
                             .Substring(0, currentPath.Length - 1)
                             .LastIndexOf('/');
                         currentPath = currentPath.Substring(0, slashIndex + 1);
                     }
                     else
+                    {
                         currentPath += dir + "/";
                     }
                 }
+            }
             else
             {
                 if (!tree.ContainsKey(currentPath))
                     tree.Add(currentPath, new List<string>());
                 tree[currentPath].Add(line);
             }
-        }
 
         return tree;
     }

Year2022/Day8.cs

@@ -8,18 +8,20 @@ public class Day8
 
     public Day8()
     {
-        Console.WriteLine("Day8 Solution");
-        Console.WriteLine($"Part1 Result: {Part1()}");
-        Console.WriteLine($"Part2 Result: {Part2()}");
-        Console.WriteLine("\n=============================\n");
+        Console.WriteLine($@"
+Day8 Solution
+Part1 Result: {Part1()}
+Part2 Result: {Part2()}
+
+=============================");
     }
 
     private static int Part1()
     {
-        int count = 0;
-        for (int i = 0; i < TreeMap.Count; i++)
-            for (int j = 0; j < TreeMap[i].Count; j++)
-                if (i == 0 || i == TreeMap.Count-1 || j == 0 || j == TreeMap.Count-1 
+        var count = 0;
+        for (var i = 0; i < TreeMap.Count; i++)
+        for (var j = 0; j < TreeMap[i].Count; j++)
+            if (i == 0 || i == TreeMap.Count - 1 || j == 0 || j == TreeMap.Count - 1
                 || TreeMap[i].Sublist(0, j).Max() < TreeMap[i][j]
                 || TreeMap[i].Sublist(j + 1, TreeMap[i].Count).DefaultIfEmpty().Max() < TreeMap[i][j]
                 || TreeMap.GetColumn(j).Sublist(0, i).Max() < TreeMap[i][j]
@@ -30,18 +32,18 @@ public class Day8
 
     private static int Part2()
     {
-        int highestScore = 0;
+        var highestScore = 0;
 
-        for (int i = 0; i < TreeMap.Count; i++)
-            for (int j = 0; j < TreeMap[i].Count; j++)
+        for (var i = 0; i < TreeMap.Count; i++)
+        for (var j = 0; j < TreeMap[i].Count; j++)
         {
             if (i == 0 || j == 0) continue;
 
-                int currentTree = TreeMap[i][j];
-                int currentTreeScore = 1;
-                int directionCount = 0;
+            var currentTree = TreeMap[i][j];
+            var currentTreeScore = 1;
+            var directionCount = 0;
 
-                for (int k = i - 1; k >= 0; k--)
+            for (var k = i - 1; k >= 0; k--)
             {
                 directionCount++;
                 if (TreeMap[k][j] >= currentTree) break;
@@ -50,7 +52,7 @@ public class Day8
             currentTreeScore *= directionCount;
             directionCount = 0;
 
-                for (int k = j - 1; k >= 0; k--)
+            for (var k = j - 1; k >= 0; k--)
             {
                 directionCount++;
                 if (TreeMap[i][k] >= currentTree) break;
@@ -59,7 +61,7 @@ public class Day8
             currentTreeScore *= directionCount;
             directionCount = 0;
 
-                for (int k = i + 1; k < TreeMap.Count; k++)
+            for (var k = i + 1; k < TreeMap.Count; k++)
             {
                 directionCount++;
                 if (TreeMap[k][j] >= currentTree) break;
@@ -68,7 +70,7 @@ public class Day8
             currentTreeScore *= directionCount;
             directionCount = 0;
 
-                for (int k = j + 1; k < TreeMap[i].Count; k++)
+            for (var k = j + 1; k < TreeMap[i].Count; k++)
             {
                 directionCount++;
                 if (TreeMap[i][k] >= currentTree) break;
@@ -83,14 +85,15 @@ public class Day8
 
     private static List<List<int>> LoadMap()
     {
-        List<List<int>> map = new List<List<int>>();
-        string[] lines = File.ReadAllLines("inputs/day8.txt");
-        for (int i = 0; i < lines.Length; i++)
+        var map = new List<List<int>>();
+        var lines = File.ReadAllLines("inputs/day8.txt");
+        for (var i = 0; i < lines.Length; i++)
         {
             map.Add(new List<int>());
-            for (int j = 0; j < lines[i].Length; j++)
+            for (var j = 0; j < lines[i].Length; j++)
                 map[i].Add(Convert.ToInt32(lines[i][j].ToString()));
         }
+
         return map;
     }
 }

Year2022/Day9.cs

@@ -6,34 +6,37 @@ public class Day9
 {
     public Day9()
     {
-        Console.WriteLine("Day9 Solution");
-        List<(char, int)> moves = new List<(char, int)>();
+        var moves = new List<(char, int)>();
         File.ReadAllLines("inputs/day9.txt").ToList().ForEach(line =>
         {
-            string[] split = line.Split(" ");
+            var split = line.Split(" ");
             moves.Add((Convert.ToChar(split[0]), Convert.ToInt32(split[1])));
         });
-        Console.WriteLine($"Part1 Result: {GetPositionCount(moves, 2)}");
-        Console.WriteLine($"Part2 Result: {GetPositionCount(moves, 10)}");
-        Console.WriteLine("\n=============================\n");
+        Console.WriteLine($@"
+Day9 Solution
+Part1 Result: {GetPositionCount(moves, 2)}
+Part2 Result: {GetPositionCount(moves, 10)}
+
+=============================");
     }
 
     private static int GetPositionCount(List<(char, int)> moves, int knots)
     {
-        List<List<int>> currentPositions = new List<List<int>>();
-        currentPositions.Fill(knots, new List<int>(new[]{0,0}));
-        HashSet<(int, int)> tailHistory = new HashSet<(int, int)>();
+        var currentPositions = new List<List<int>>();
+        currentPositions.Fill(knots, new List<int>(new[] { 0, 0 }));
+        var tailHistory = new HashSet<(int, int)>();
 
-        foreach ((char, int) move in moves)
-            for (int moveN = 0; moveN < move.Item2; moveN++)
+        foreach (var move in moves)
+            for (var moveN = 0; moveN < move.Item2; moveN++)
             {
-                int[] vector = GetVector(move.Item1);
-                int[] previousTailPosition = currentPositions[0].ToArray(); 
+                var vector = GetVector(move.Item1);
+                var previousTailPosition = currentPositions[0].ToArray();
                 currentPositions[0] = UpdateHead(vector, currentPositions[0]);
-                for (int tailN = 0; tailN < knots-1; tailN++)
+                for (var tailN = 0; tailN < knots - 1; tailN++)
                 {
-                    int[] nextPreviousTailPosition = currentPositions[tailN + 1].ToArray();
-                    currentPositions[tailN + 1] = UpdateTail(currentPositions[tailN], currentPositions[tailN + 1], previousTailPosition);
+                    var nextPreviousTailPosition = currentPositions[tailN + 1].ToArray();
+                    currentPositions[tailN + 1] = UpdateTail(currentPositions[tailN], currentPositions[tailN + 1],
+                        previousTailPosition);
                     previousTailPosition = nextPreviousTailPosition;
                     if (tailN == knots - 2)
                         tailHistory.Add((currentPositions[knots - 1][0], currentPositions[knots - 1][1]));
@@ -50,9 +53,10 @@ public class Day9
         return new List<int> { currentPosition[0], currentPosition[1] };
     }
 
-    private static List<int> UpdateTail(List<int> currentHeadPosition, List<int> currentTailPosition, int[] previousTailPosition)
+    private static List<int> UpdateTail(List<int> currentHeadPosition, List<int> currentTailPosition,
+        int[] previousTailPosition)
     {
-        List<int> head = new List<int>
+        var head = new List<int>
         {
             currentHeadPosition[0] - previousTailPosition[0],
             currentHeadPosition[1] - previousTailPosition[1]
@@ -69,7 +73,7 @@ public class Day9
                     currentTailPosition[1] + head[1]
                 };
 
-            List<int> difference = new List<int>
+            var difference = new List<int>
             {
                 currentHeadPosition[0] - currentTailPosition[0],
                 currentHeadPosition[1] - currentTailPosition[1]

Year2022/Loader2022.cs

@@ -4,6 +4,12 @@ public static class Loader2022
 {
     public static void Load()
     {
+        /* Year 2022
+         *
+         * Solutions in C# for the 2022 Advent of Code
+         * Slower solutions are commented
+         */
+
         new Day1();
         new Day2();
         new Day3();
@@ -11,8 +17,10 @@ public static class Loader2022
         new Day5();
         new Day6();
         new Day7();
-        // new Day8();  -- Commented because it's a slow solution
+        // new Day8();  
         new Day9();
         new Day10();
+        // new Day11();
+        // new Day12();
     }
 }

Year2023/Day1.cs

@@ -0,0 +1,56 @@
+namespace AdventOfCode.Year2023;
+
+public class Day1
+{
+    private static string[] Input = File.ReadAllLines("inputs/Year2023/day1.txt");
+
+    private static Dictionary<string, int> Part1Numbers = new Dictionary<string, int>() {
+        {"1", 1},
+        {"2", 2},
+        {"3", 3},
+        {"4", 4},
+        {"5", 5},
+        {"6", 6},
+        {"7", 7},
+        {"8", 8},
+        {"9", 9},
+    };
+
+    private static Dictionary<string, int> Part2Numbers = new Dictionary<string, int>(Part1Numbers) {
+        {"one", 1},
+        {"two", 2},
+        {"three", 3},
+        {"four", 4},
+        {"five", 5},
+        {"six", 6},
+        {"seven", 7},
+        {"eight", 8},
+        {"nine", 9},
+    };
+
+    public static void Run()
+    {
+        Console.WriteLine($@"
+Day1 Solution
+Part1 Result: {Solve(Part1Numbers)}
+Part2 Result: {Solve(Part2Numbers)}
+
+=============================");
+    }
+
+    private static int Solve(Dictionary<string, int> numbers)
+        => Input.Select(line =>
+        {
+            int first = numbers.Select(num => (index: line.IndexOf(num.Key), val: num.Value))
+            .Where(num => num.index >= 0)
+            .MinBy(num => num.index)
+            .val;
+
+            int last = numbers.Select(num => (index: line.LastIndexOf(num.Key), val: num.Value))
+            .Where(num => num.index >= 0)
+            .MaxBy(num => num.index)
+            .val;
+
+            return first * 10 + last;
+        }).Sum();
+}

Year2023/Day2.cs

@@ -0,0 +1,99 @@
+namespace AdventOfCode.Year2023;
+
+public static class Day2
+{
+    private static List<string> Input = File.ReadAllLines("inputs/Year2023/day2.txt").ToList();
+
+    private class Game
+    {
+        public int Id { get; set; }
+        public List<Dictionary<string, int>> Sets { get; set; } = new List<Dictionary<string, int>>();
+    }
+    private static List<Game> Games = new List<Game>();
+
+    public static void Run()
+    {
+        ParseGames();
+        Console.WriteLine($@"
+Day2 Solution
+Part1 Result: {Part1()}
+Part2 Result: {Part2()}
+
+=============================");
+    }
+
+    private static int Part1()
+    {
+        int sum = 0;
+
+        foreach (var game in Games)
+        {
+            foreach (var set in game.Sets)
+                if (set["red"] > 12 || set["green"] > 13 || set["blue"] > 14) goto cont;
+            sum += game.Id;
+        cont: continue;
+        }
+
+        return sum;
+    }
+
+    private static int Part2()
+    {
+        int sum = 0;
+
+        foreach (var game in Games)
+        {
+            Dictionary<string, int> minimum = new Dictionary<string, int> {
+                {"red", 0},
+                {"green", 0},
+                {"blue", 0}
+            };
+            foreach (var set in game.Sets)
+            {
+                foreach (var color in set.Keys)
+                {
+                    if (minimum[color] < set[color]) minimum[color] = set[color];
+                }
+            }
+            sum += minimum.Values.ToArray().Product();
+        }
+
+        return sum;
+    }
+
+    private static void ParseGames()
+    {
+        foreach (var line in Input)
+        {
+            Game game = new Game();
+
+            string[] game_sets = line.Split(": ");
+            game.Id = Convert.ToInt32(game_sets[0].Split(" ")[1]);
+
+            string[] sets = game_sets[1].Split("; ");
+
+            foreach (var setStr in sets)
+            {
+                Dictionary<string, int> set = new Dictionary<string, int>();
+                foreach (var color in setStr.Split(", "))
+                {
+                    set.Add(color.Split(" ")[1], Convert.ToInt32(color.Split(" ")[0]));
+                }
+                if (!set.ContainsKey("red")) set.Add("red", 0);
+                if (!set.ContainsKey("green")) set.Add("green", 0);
+                if (!set.ContainsKey("blue")) set.Add("blue", 0);
+                game.Sets.Add(set);
+            }
+
+            Games.Add(game);
+        }
+    }
+
+    private static int Product(this int[] array)
+    {
+        int result = 1;
+        foreach (var e in array)
+            result *= e;
+        return result;
+    }
+}

Year2023/Day4.cs

@@ -0,0 +1,61 @@
+using System.Text.RegularExpressions;
+
+namespace AdventOfCode.Year2023;
+
+public static class Day4
+{
+    private class Card
+    {
+        public int CardNumber { get; set; }
+        public int ValidNumbers { get; set; }
+    }
+
+    private static List<Card> Cards = new();
+    private static double Sum;
+
+    public static void Run()
+    {
+        File.ReadAllLines("inputs/Year2023/day4.txt").ToList().ForEach(line =>
+        {
+            Card card = new Card();
+            card.CardNumber = Convert.ToInt32(Regex.Split(line.Split(": ")[0], @"\s+").Last());
+            string[] cardNumbers = Regex.Split(line.Split(": ")[1], @"\s+\|\s+");
+            int[] winningNumbers = Regex.Split(cardNumbers.First(), @"\W+").Where(x => !string.IsNullOrEmpty(x)).Select(x => Convert.ToInt32(x)).ToArray();
+            int[] numbers = Regex.Split(cardNumbers.Last(), @"\W+").Where(x => !string.IsNullOrEmpty(x)).Select(x => Convert.ToInt32(x)).ToArray();
+            card.ValidNumbers = 0;
+            numbers.ToList().ForEach(number => card.ValidNumbers += winningNumbers.Contains(number) ? 1 : 0);
+            Cards.Add(card);
+        });
+
+        Console.WriteLine($@"
+Day4 Solution
+Part1 Result: {Part1()}
+Part2 Result: {Part2()}
+
+=============================");
+    }
+
+    private static double Part1()
+    {
+        Sum = 0;
+        Cards.ForEach(card => Sum += card.ValidNumbers > 0 ? Math.Pow(2, card.ValidNumbers - 1) : 0);
+        return Sum;
+    }
+
+    private static double Part2()
+    {
+        Sum = 0;
+
+        Dictionary<int, int> CardInstances = new();
+        Cards.ForEach(card => CardInstances.Add(card.CardNumber, 1));
+        Cards.ForEach(card =>
+        {
+            for (int i = card.CardNumber + 1; i <= card.CardNumber + card.ValidNumbers; i++)
+                CardInstances[i] += CardInstances[card.CardNumber];
+
+            Sum += CardInstances[card.CardNumber];
+        });
+
+        return Sum;
+    }
+}

Year2023/Day5.cs

@@ -0,0 +1,66 @@
+namespace AdventOfCode.Year2023;
+
+public static class Day5
+{
+    private class Converter
+    {
+        public string? Name { get; set; }
+        public long Start { get; set; }
+        public long End { get; set; }
+        public long Count { get; set; }
+    }
+    private static string[] MapTypes = { "seed-to-soil", "soil-to-fertilizer", "fertilizer-to-water", "water-to-light", "light-to-temperature", "temperature-to-humidity", "humidity-to-location", };
+    private static List<Converter> Converters = new List<Converter>();
+
+    private static string? CurrentMap;
+
+    public static void Run()
+    {
+        string[] input = File.ReadAllLines("inputs/Year2023/day5.txt")[2..].ToArray();
+
+        foreach (var line in input)
+        {
+            if (String.IsNullOrEmpty(line))
+            {
+                continue;
+            }
+            if (Char.IsLetter(line[0]))
+            {
+                CurrentMap = line.Split(" ")[0];
+                continue;
+            }
+            Converters.Add(new Converter
+            {
+                Name = CurrentMap,
+                Start = Convert.ToInt64(line.Split(" ")[1]),
+                End = Convert.ToInt64(line.Split(" ")[0]),
+                Count = Convert.ToInt64(line.Split(" ")[2])
+            });
+        }
+
+        Console.WriteLine($@"
+Day5 Solution
+Part1 Result: {Part1()}
+
+=============================");
+    }
+
+    private static long Part1()
+    {
+        List<long> seeds = File.ReadAllLines("inputs/Year2023/day5.txt")[0].Split(": ")[1].Split(" ").Select(long.Parse).ToList();
+        List<long> locations = new List<long>(seeds);
+
+        for (int i = 0; i < seeds.Count(); i++)
+        {
+            locations[i] = seeds[i];
+            foreach (var type in MapTypes)
+            {
+                Converter? conv = Converters.Where(c => c.Name == type).Where(c => (c.Start <= locations[i] && c.Start + c.Count > locations[i])).FirstOrDefault();
+                if (conv == null) continue;
+                locations[i] = conv.End + locations[i] - conv.Start;
+            }
+        }
+
+        return locations.Min();
+    }
+}

Year2023/Loader2023.cs

@@ -0,0 +1,19 @@
+namespace AdventOfCode.Year2023;
+
+public static class Loader2023
+{
+    public static void Load()
+    {
+        /* Year 2023
+         *
+         * Solutions in C# for the 2023 Advent of Code
+         * Slower solutions are commented
+         */
+
+        Day1.Run();
+        Day2.Run();
+        Day4.Run();
+        Day5.Run();
+    }
+}
+