Completed Day 11

AdvendOfCode.Runner/Program.cs

@@ -7,9 +7,9 @@ InputReader inputReader = new()
     //IsDebug = true
 };
 
-inputReader.SetInputByChallange(5);
+//inputReader.SetInputByChallange(5);
 
-IChallange challange = new Day05(inputReader);
+IChallange challange = new Day11(inputReader);
 
 Console.WriteLine($"Part 1: {await challange.GetSolutionPart1()}");
 

AdventOfCode.Solutions/2023/Day 11/Day11.cs

@@ -0,0 +1,85 @@
+using AdventOfCode.Core;
+using System.Text.RegularExpressions;
+
+namespace AdventOfCode.Solutions._2023
+{
+    public class Day11(InputReader reader) : IChallange
+    {
+        private InputReader _inputReader = reader;
+
+        public async Task<string> GetSolutionPart1()
+        {
+            string[] data = await _inputReader.ReadAsArrayString();
+            return CreateUniverseAndGetDistances(data).ToString();
+        }
+
+        public async Task<string> GetSolutionPart2()
+        {
+            string[] data = await _inputReader.ReadAsArrayString();
+            return CreateUniverseAndGetDistances(data, true).ToString();
+        }
+
+        private long CreateUniverseAndGetDistances(string[] lineInput, bool part2 = false)
+        {
+            List<int> columns = []; // the list of indexes where expation takes place
+            for (int columnIndex = 0;  columnIndex < lineInput[0].Length; columnIndex++) 
+            {
+                if(lineInput.Select(line => line[columnIndex]).All(c => c == '.'))
+                {
+                    columns.Add(columnIndex);
+                }
+            }
+
+            List<Galaxy> galaxies = [];
+            int rowsAdded = 0; // the rows where expation takes place
+            for (int rowIndex = 0;  rowIndex < lineInput.Length; rowIndex++) 
+            { 
+                if (lineInput[rowIndex].All(c => c == '.'))
+                {
+                    rowsAdded++; // add and continue
+                    continue;
+                }
+
+                foreach (Match galaxyMatch in Regex.Matches(lineInput[rowIndex], @"#"))
+                {
+                    int columnExpantion = columns.Where(c => c < galaxyMatch.Index).Count();
+                    Galaxy newGalaxy = new(rowIndex, galaxyMatch.Index, columnExpantion, rowsAdded);
+                    galaxies.Add(newGalaxy);
+                }
+            }
+
+            long total = 0;
+
+            for (int galaxiesIndex = 0; galaxiesIndex < galaxies.Count - 1; galaxiesIndex++)
+            {
+                total += galaxies
+                    .Where(g => galaxies.IndexOf(g) > galaxiesIndex) // only take the next ones, skip all prev ones
+                    .Select(g => 
+                        galaxies[galaxiesIndex].DistanceTo(g) + // get the distance
+                        galaxies[galaxiesIndex].GetExpantionsDistance(g, part2) // get the expantion distance
+                    )
+                    .Sum();
+            }
+
+            return total;
+        }
+
+        private class Galaxy(int x, int y, int xExpantion, int yExpantion) : Node(x, y, '#')
+        {
+            public int HorizonalExpantions { get; set; } = xExpantion;
+            public int VerticalExpantions { get; set; } = yExpantion;
+
+            public long GetExpantionsDistance(Galaxy other, bool part2 = false)
+            {
+                int times = Math.Abs(HorizonalExpantions - other.HorizonalExpantions) + Math.Abs(VerticalExpantions - other.VerticalExpantions);
+                
+                if (part2)
+                {
+                    return (times * 1_000_000) - times;
+                }
+
+                return times;
+            }
+        }
+    }
+}

AdventOfCode.Solutions/2023/Day 11/day-11-input.txt

@@ -0,0 +1,140 @@
+.#...........#.........................................................................#...............#...........#........................
+.......................#....................................................................................................................
+...............................#...........#.................#.............................#.............................................#..
+......#............................................#........................................................................................
+......................................................................#.....#.....................#.........................................
+.................#.......#.......................................#................#.....#.....................#.............................
+.........................................#.................#................................................................................
+................................#.............................................................#..........#..................................
+#.......................................................................#..............................................#.................#..
+..........#....................................#......................................#............................................#........
+................#....................................#........#.............................................................................
+......#........................................................................#............................................................
+......................#..............#..............................................................#..........#.....#......................
+..................................................#.......................#..................................................#..........#...
+............................#...............................................................................................................
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+..................#.......................#................................................................#................................
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+..............................#.......#......................................#.............#........................#.......................
+.#............................................................................................................#...........................#.
+...................................................................................................#....................#...................
+....................#......................#.............#.....#..................................................................#.........
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+#..........#......................#...................................................#.......#.....#.......................................
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+....................#..............................#.............#.........................................#.......#........#...............
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+..........#....................................................................................................#............................
+...............#................................#..........................#..............................................................#.
+..#.................................#.................................................................#.......................#.............
+.....................#......#...............#........................#................................................#.....................
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+......#.................................#.......#....................#...............................................................#......
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+.......#............................................#.....#....................#..............#.....#.......................................
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+...#....................#.....#............#.........................................................................................#......
+...............#.............................................................#..................#........#................#.................
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+.....................#.............#.........................................................................#..............................
+.....#...............................................................................................................#..............#......#
+...........#.......................................#.....#.................#.................#..............................................
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+.#.......................................#..........................................#................#......................................
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+...............#.............#................................#......#.......................................................#..............
+............................................................................................................................................
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+.....................#......................................#.......#......#........#..................#...........................#........
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+#................................................................................................................................#..........
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+..............................#...............................................#.................#......................................#....
+....#....................#......................................#...................#...............................#.......#...............
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+............................................................................................................................................
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+.......#........................................................#................................................................#..........
+..........................#......#......#..................................................................................#................
+...............................................#.....#.................#....................................................................
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+................#....................#.....................................................................#........#.......................
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+...........................................#.............................................................................................#..
+....#........................#..............................#.............#................#................................................
+......................#..........................................................................................#......#...................
+....................................................#................................#.........#............................................
+..........................#.......................................#.........................................................................
+.................#........................#.....#........................................................#..................................
+.#.........................................................#............#....................................................#..............
+..........#..................#.....#..................................................................................................#.....
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+.....................................................#....................................#.........#...........#.....#.....................
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+......#........................................................#..............................#.............................................
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+.....................#......#......#.............................................................#............#...........#.................

AdventOfCode.Solutions/AdventOfCode.Solutions.csproj

@@ -12,6 +12,9 @@
   </ItemGroup>
 
   <ItemGroup>
+    <Compile Update="2023\Day 11\Day11.cs">
+      <CopyToOutputDirectory>Always</CopyToOutputDirectory>
+    </Compile>
     <Compile Update="2023\Day 10\Day10.cs">
       <CopyToOutputDirectory>Always</CopyToOutputDirectory>
     </Compile>

AdventOfCode.Solutions/day-00-input.txt

@@ -1,33 +1,10 @@
-seeds: 79 14 55 13
+...#......
-
+.......#..
-seed-to-soil map:
+#.........
-50 98 2
+..........
-52 50 48
+......#...
-
+.#........
-soil-to-fertilizer map:
+.........#
-0 15 37
+..........
-37 52 2
+.......#..
-39 0 15
+#...#.....
-
-fertilizer-to-water map:
-49 53 8
-0 11 42
-42 0 7
-57 7 4
-
-water-to-light map:
-88 18 7
-18 25 70
-
-light-to-temperature map:
-45 77 23
-81 45 19
-68 64 13
-
-temperature-to-humidity map:
-0 69 1
-1 0 69
-
-humidity-to-location map:
-60 56 37
-56 93 4