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@@ -0,0 +1,128 @@
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+using System;
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+using System.IO;
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+
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+namespace D18._1
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+{
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+ class Program
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+ {
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+ enum EnumType { Open = 0, Trees, Lumber }
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+ static void Main(string[] args)
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+ {
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+ if (args.Length < 1) return;
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+ if (File.Exists(args[0]) == false) return;
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+ var file = File.OpenText(args[0]);
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+
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+ const int size = 50;
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+
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+ var map = new (EnumType type, (int o, int t, int l) adj)[size, size];
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+ CreateMap(file, map);
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+
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+ (int o, int t, int l) count = (0, 0, 0);
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+
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+ int minutes = 1;
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+ do
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+ {
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+ FillAdjacency(size, map);
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+ count = (0, 0, 0);
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+
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+ for (var y = 0; y < size; ++y)
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+ {
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+ for (var x = 0; x < size; ++x)
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+ {
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+ var tile = map[y, x];
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+ if (tile.type == EnumType.Open)
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+ {
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+ if (tile.adj.t >= 3) map[y, x].type = EnumType.Trees;
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+ }
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+
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+ else if (tile.type == EnumType.Trees)
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+ {
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+ if (tile.adj.l >= 3) map[y, x].type = EnumType.Lumber;
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+ }
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+
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+ else if (tile.type == EnumType.Lumber)
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+ {
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+ if (tile.adj.l >= 1 && tile.adj.t >= 1) map[y, x].type = EnumType.Lumber;
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+ else map[y, x].type = EnumType.Open;
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+ }
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+
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+ if (map[y, x].type == EnumType.Open) count.o++;
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+ if (map[y, x].type == EnumType.Trees) count.t++;
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+ if (map[y, x].type == EnumType.Lumber) count.l++;
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+ }
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+ }
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+
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+ } while (minutes++ < 10);
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+
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+ int result = count.l * count.t;
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+ Console.WriteLine($"The result is : {result}");
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+ }
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+
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+ private static void FillAdjacency(int size, (EnumType type, (int o, int t, int l) adj)[,] map)
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+ {
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+ for (var y = 0; y < size; ++y)
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+ for (var x = 0; x < size; ++x)
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+ {
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+ int count1 = OfType(EnumType.Open, size, map, y, x);
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+ int count2 = OfType(EnumType.Trees, size, map, y, x);
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+ int count3 = OfType(EnumType.Lumber, size, map, y, x);
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+
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+ var result = (count1, count2, count3);
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+
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+ map[y, x].adj = result;
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+ }
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+ }
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+
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+ private static int OfType(EnumType type, int size, (EnumType type, (int o, int t, int l) adj)[,] map, int y, int x)
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+ {
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+ int count = 0;
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+ if (y > 0 && x > 0) count += map[y - 1, x - 1].type == type ? 1 : 0;
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+ if (y > 0) count += map[y - 1, x].type == type ? 1 : 0;
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+ if (y > 0 && x < size-1) count += map[y - 1, x + 1].type == type ? 1 : 0;
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+
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+ if (x > 0) count += map[y, x - 1].type == type ? 1 : 0;
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+ if (x < size-1) count += map[y, x + 1].type == type ? 1 : 0;
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+
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+ if (y < size-1 && x > 0) count += map[y + 1, x - 1].type == type ? 1 : 0;
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+ if (y < size-1) count += map[y + 1, x].type == type ? 1 : 0;
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+ if (y < size-1 && x < size-1) count += map[y + 1, x + 1].type == type ? 1 : 0;
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+ return count;
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+ }
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+
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+ private static void CreateMap(StreamReader file, (EnumType type, (int o, int t, int l) adj)[,] map)
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+ {
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+ int y = 0;
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+ do
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+ {
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+ var line = file.ReadLine();
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+ if (line == null) break;
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+
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+ int x = 0;
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+ foreach (var c in line)
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+ {
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+ EnumType type;
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+ switch (c)
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+ {
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+ case '|':
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+ type = EnumType.Trees;
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+ break;
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+ case '#':
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+ type = EnumType.Lumber;
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+ break;
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+ case '.':
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+ default:
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+ type = EnumType.Open;
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+ break;
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+
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+ }
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+
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+ map[y, x] = (type, (0, 0, 0));
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+ x++;
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+ }
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+
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+
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+ ++y;
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+ } while (true);
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+ }
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+ }
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+}
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bastien.monsarrat