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Add Day 6 part 1

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This commit is contained in:
Dimitrios Kaltzidis
2024-12-06 17:21:01 +02:00
parent 2d14ac7819
commit daffd58ed0
4 changed files with 116 additions and 0 deletions
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6
AdventOfCode2024.sln
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@@ -13,6 +13,8 @@ Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Day4", "Day4\Day4.csproj",
EndProject
Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Day5", "Day5\Day5.csproj", "{F6C4FEFC-795A-45A5-A227-3DCA06749BAD}"
EndProject
Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Day6", "Day6\Day6.csproj", "{6E7CF4A7-6667-4081-9E54-36452956EE8C}"
EndProject
Global
GlobalSection(SolutionConfigurationPlatforms) = preSolution
Debug|Any CPU = Debug|Any CPU
@@ -39,6 +41,10 @@ Global
{F6C4FEFC-795A-45A5-A227-3DCA06749BAD}.Debug|Any CPU.Build.0 = Debug|Any CPU
{F6C4FEFC-795A-45A5-A227-3DCA06749BAD}.Release|Any CPU.ActiveCfg = Release|Any CPU
{F6C4FEFC-795A-45A5-A227-3DCA06749BAD}.Release|Any CPU.Build.0 = Release|Any CPU
{6E7CF4A7-6667-4081-9E54-36452956EE8C}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
{6E7CF4A7-6667-4081-9E54-36452956EE8C}.Debug|Any CPU.Build.0 = Debug|Any CPU
{6E7CF4A7-6667-4081-9E54-36452956EE8C}.Release|Any CPU.ActiveCfg = Release|Any CPU
{6E7CF4A7-6667-4081-9E54-36452956EE8C}.Release|Any CPU.Build.0 = Release|Any CPU
EndGlobalSection
GlobalSection(SolutionProperties) = preSolution
HideSolutionNode = FALSE

16
Day6/Day6.csproj Normal file
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@@ -0,0 +1,16 @@
<Project Sdk="Microsoft.NET.Sdk">
<PropertyGroup>
<OutputType>Exe</OutputType>
<TargetFramework>net8.0</TargetFramework>
<ImplicitUsings>enable</ImplicitUsings>
<Nullable>enable</Nullable>
</PropertyGroup>
<ItemGroup>
<None Update="input.txt">
<CopyToOutputDirectory>Always</CopyToOutputDirectory>
</None>
</ItemGroup>
</Project>

84
Day6/Program.cs Normal file
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@@ -0,0 +1,84 @@
var lines = File.ReadAllLines("input.txt");
var charArray = new char[lines.Length, lines[0].Length];
Dictionary<Direction, (int dx, int dy)> moves = new()
{
{ Direction.Up, (-1, 0) },
{ Direction.Right, (0, 1) },
{ Direction.Down, (1, 0) },
{ Direction.Left, (0, -1) }
};
var guardCurrentPosition = (0, 0);
var guardDirection = Direction.Up;
var visitedPositions = new List<int[]>();
for (var i = 0; i < charArray.GetLength(0); i++)
for (var j = 0; j < charArray.GetLength(1); j++)
{
if (lines[i][j] == '^')
{
guardCurrentPosition.Item1 = i;
guardCurrentPosition.Item2 = j;
visitedPositions.Add([guardCurrentPosition.Item1, guardCurrentPosition.Item2]);
}
charArray[i, j] = lines[i][j];
}
var nextPosition = CalculateNextPosition(guardCurrentPosition.Item1, guardCurrentPosition.Item2, guardDirection);
while (IsValid(nextPosition.Item1, nextPosition.Item2, charArray))
{
if (IsBlocked(nextPosition.Item1, nextPosition.Item2, charArray))
{
guardDirection = (Direction)(((int)guardDirection + 1) % 4);
}
else
{
guardCurrentPosition = (nextPosition.Item1, nextPosition.Item2);
visitedPositions.Add([guardCurrentPosition.Item1, guardCurrentPosition.Item2]);
}
nextPosition = CalculateNextPosition(guardCurrentPosition.Item1, guardCurrentPosition.Item2, guardDirection);
}
Console.WriteLine($"Part1: {visitedPositions.Select(x => $"r{x[0]},c{x[1]}").Distinct().Count()}");
PrintMap(charArray, visitedPositions);
(int, int) CalculateNextPosition(int row, int col, Direction direction)
{
var (dx, dy) = moves[direction];
return (row + dx, col + dy);
}
bool IsValid(int row, int column, char[,] grid) => row >= 0 && row < grid.GetLength(0) && column >= 0 && column < grid.GetLength(1);
bool IsBlocked(int row, int col, char[,] grid) => grid[row, col] == '#';
void PrintMap(char[,] input, List<int[]> visitedPositions)
{
for (var i = 0; i < input.GetLength(0); i++)
{
for (var j = 0; j < input.GetLength(1); j++)
{
if (visitedPositions.Any(x => x[0] == i && x[1] == j) && input[i, j] != '^')
{
Console.Write("X");
}
else
{
Console.Write(input[i, j]);
}
}
Console.WriteLine();
}
}
enum Direction
{
Up,
Right,
Down,
Left
}

10
Day6/input.txt Normal file
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@@ -0,0 +1,10 @@
....#.....
.........#
..........
..#.......
.......#..
..........
.#..^.....
........#.
#.........
......#...