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Add day 11

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This commit is contained in:
Dimitrios Kaltzidis
2024-12-11 19:45:01 +02:00
parent 51a7f1ba1b
commit e8817bbdfd
4 changed files with 72 additions and 0 deletions
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6
AdventOfCode2024.sln
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@@ -23,6 +23,8 @@ Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Day9", "Day9\Day9.csproj",
EndProject
Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Day10", "Day10\Day10.csproj", "{9DA97BBA-99AF-4FA7-97BB-C6EF3F8B24A4}"
EndProject
Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Day11", "Day11\Day11.csproj", "{FE187D99-D153-4909-959C-FA9C81444D11}"
EndProject
Global
GlobalSection(SolutionConfigurationPlatforms) = preSolution
Debug|Any CPU = Debug|Any CPU
@@ -69,6 +71,10 @@ Global
{9DA97BBA-99AF-4FA7-97BB-C6EF3F8B24A4}.Debug|Any CPU.Build.0 = Debug|Any CPU
{9DA97BBA-99AF-4FA7-97BB-C6EF3F8B24A4}.Release|Any CPU.ActiveCfg = Release|Any CPU
{9DA97BBA-99AF-4FA7-97BB-C6EF3F8B24A4}.Release|Any CPU.Build.0 = Release|Any CPU
{FE187D99-D153-4909-959C-FA9C81444D11}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
{FE187D99-D153-4909-959C-FA9C81444D11}.Debug|Any CPU.Build.0 = Debug|Any CPU
{FE187D99-D153-4909-959C-FA9C81444D11}.Release|Any CPU.ActiveCfg = Release|Any CPU
{FE187D99-D153-4909-959C-FA9C81444D11}.Release|Any CPU.Build.0 = Release|Any CPU
EndGlobalSection
GlobalSection(SolutionProperties) = preSolution
HideSolutionNode = FALSE

16
Day11/Day11.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>

49
Day11/Program.cs Normal file
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@@ -0,0 +1,49 @@
var input =File.ReadAllText("input.txt").Split(' ').Select(long.Parse).ToList();
var part1 = GetStonesAfterIteration(25, new List<long>(input)).Values.Sum().ToString();
var part2 = GetStonesAfterIteration(75, new List<long>(input)).Values.Sum().ToString();
Console.WriteLine($"Part1: {part1}\nPart2: {part2}");
Dictionary<long, long> GetStonesAfterIteration(int iteration, List<long> input)
{
var stones = input.ToDictionary(x => x, x => input.LongCount(y => y == x));
stones.TryAdd(1, 0);
for (var i = 0; i < iteration; i++)
{
var modifications = new Dictionary<long, long> { { 1, 0 } };
foreach (var stone in stones)
{
if (stone.Key == 0)
{
AddStone(1, stone.Value, modifications);
}
else if (stone.Key.ToString().Length % 2 == 0)
{
var stoneString = stone.Key.ToString();
var leftStone = int.Parse(stoneString[..(stoneString.Length / 2)]);
var rightStone = int.Parse(stoneString[(stoneString.Length / 2)..]);
AddStone(leftStone, stone.Value, modifications);
AddStone(rightStone, stone.Value, modifications);
}
else
{
AddStone(stone.Key * 2024, stone.Value, modifications);
}
stones.Remove(stone.Key);
}
foreach (var modification in modifications) stones[modification.Key] = modification.Value;
modifications.Clear();
}
return stones.Where(x => x.Value > 0).ToDictionary(x => x.Key, x => x.Value);
}
void AddStone(long key, long value, Dictionary<long, long> modifications)
{
if (!modifications.TryAdd(key, value)) modifications[key] += value;
}

1
Day11/input.txt Normal file
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@@ -0,0 +1 @@
572556 22 0 528 4679021 1 10725 2790