[2022] Day5 added

Utils/Extensions.cs

@@ -29,4 +29,51 @@ public static class Extensions
         foreach (List<T> row in list) result.AddRange(row.Where((t, i) => i == column));
         return result;
     }
+
+    /// <summary>
+    /// Reverses a given list
+    /// </summary>
+    /// <param name="list">The list to reverse</param>
+    /// <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]);
+        return reversed;
+    }
+
+    /// <summary>
+    /// Clones a list of elements
+    /// </summary>
+    /// <param name="original">The original list</param>
+    /// <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)
+            ret.Add(element);
+        return ret;
+    }
+
+    public static Dictionary<TKey, TValue> Clone<TKey, TValue>
+        (this Dictionary<TKey, TValue> original)
+        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());
+        return ret;
+    }
+    
+    public static Dictionary<TKey, List<TValue>> Clone<TKey, TValue>
+        (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)
+            ret.Add(entry.Key, entry.Value.Clone());
+        return ret;
+    }
 }

Year2022/Day5.cs

@@ -0,0 +1,85 @@
+using AdventOfCode.Utils;
+
+namespace AdventOfCode.Year2022;
+
+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()
+    };
+
+    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");
+        LoadCrates(input[0]);
+        LoadMoves(input[1]);
+
+        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)
+        {
+            List<char> cratesMoved = crates[move.Item2].Sublist(0, move.Item1);
+            for (int i = 0; i < move.Item1; i++)
+                crates[move.Item2].Remove(crates[move.Item2][0]);
+            foreach (char crate in part == Part.Part1 ? cratesMoved : cratesMoved.Reversed())
+                crates[move.Item3].Insert(0, crate);
+        }
+
+        string result = "";
+        foreach (List<char> 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)
+        {
+            int firstCrate = 0;
+            if (line[firstCrate] == '[')
+                Crates[1].Add(line[1]);
+            while (line.Substring(firstCrate+1).Contains('['))
+            {
+                firstCrate = line.IndexOf('[', firstCrate + 1);
+                Crates[firstCrate / 4 + 1].Add(line[firstCrate + 1]);
+            }
+        }
+    }
+
+    private static void LoadMoves(string moves)
+    {
+        string[] move_lines = moves.Split("\n");
+        foreach (string line in move_lines)
+        {
+            string move = line.Substring(5);
+            string[] moved = move.Split(" from ");
+            string[] crates = moved[1].Split(" to ");
+            Moves.Add((Convert.ToInt32(moved[0]), Convert.ToInt32(crates[0]), Convert.ToInt32(crates[1])));
+        }
+    }
+
+    private enum Part
+    {
+        Part1, Part2
+    }
+}

Year2022/Day8.cs

@@ -19,15 +19,12 @@ public class Day8
         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 
                     || 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] 
                     || TreeMap.GetColumn(j).Sublist(i + 1, TreeMap[i].Count).DefaultIfEmpty().Max() < TreeMap[i][j])
                     count++;
-            }
-
         return count;
     }
 

Year2022/Loader2022.cs

@@ -8,6 +8,7 @@ public static class Loader2022
         new Day2();
         new Day3();
         new Day4();
+        new Day5();
         new Day6();
         new Day7();
         // new Day8();  -- Commented because it's a slow solution