Day 8 - Part 1

Day8/Day8.cs

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+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Linq;
+
+namespace Advent
+{
+    public static class Day8
+    {
+        public static void Execute()
+        {
+            var lines = File.ReadAllLines(@".\Day8\input.txt");
+
+            var data = lines[0].ToCharArray();
+
+            var index = 0;
+
+            var minimumZeroCount = int.MaxValue;
+            var minimumZeroLayer = 0;
+
+            var layers = new List<char[]>();
+
+            while (index < data.Length)
+            {
+                var layer = data[index..(index + 25 * 6)];
+
+                layers.Add(layer);
+
+                index += (25 * 6);
+            }
+
+            var layerIndex = 0;
+
+            foreach (var layer in layers)
+            {
+                var currentZeroCount = layer.Count(c => c == '0');
+
+                if (currentZeroCount < minimumZeroCount)
+                {
+                    minimumZeroCount = currentZeroCount;
+                    minimumZeroLayer = layerIndex;
+                }
+
+                layerIndex++;
+            }
+
+            Console.WriteLine(layers[minimumZeroLayer].Count(c => c == '1') * layers[minimumZeroLayer].Count(c => c == '2'));
+        }
+    }
+}