AoC 2023: Day 2

- Also updated to .NET 8.0

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

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>

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/Loader2023.cs

@@ -11,6 +11,7 @@ public static class Loader2023
          */
 
         Day1.Run();
+        Day2.Run();
     }
 }