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Merge pull request #11 from StevanFreeborn/stevanfreeborn/feat/solve-puzzle-11

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feat: solve puzzle 11
This commit is contained in:
Stevan Freeborn
2023-12-16 20:42:46 -06:00
committed by GitHub
parent e282fd1686 3620d3f880
commit 6ba92a3d4b
7 changed files with 431 additions and 1 deletions
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11/CosmicExpansion.Tests/CosmicExpansion.Tests.csproj
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@@ -0,0 +1,36 @@
<Project Sdk="Microsoft.NET.Sdk">
<PropertyGroup>
<TargetFramework>net8.0</TargetFramework>
<ImplicitUsings>enable</ImplicitUsings>
<Nullable>enable</Nullable>
<IsPackable>false</IsPackable>
<IsTestProject>true</IsTestProject>
</PropertyGroup>
<ItemGroup>
<PackageReference Include="FluentAssertions" Version="6.12.0" />
<PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.6.0" />
<PackageReference Include="xunit" Version="2.4.2" />
<PackageReference Include="xunit.runner.visualstudio" Version="2.4.5">
<IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
<PrivateAssets>all</PrivateAssets>
</PackageReference>
<PackageReference Include="coverlet.collector" Version="6.0.0">
<IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
<PrivateAssets>all</PrivateAssets>
</PackageReference>
</ItemGroup>
<ItemGroup>
<ProjectReference Include="..\CosmicExpansion\CosmicExpansion.csproj" />
</ItemGroup>
<ItemGroup>
<Content Include="..\INPUT.txt">
<CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
</Content>
</ItemGroup>
</Project>
11/CosmicExpansion.Tests/GlobalUsings.cs
+2
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@@ -0,0 +1,2 @@
global using Xunit;
global using FluentAssertions;
11/CosmicExpansion.Tests/UniverseTests.cs
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@@ -0,0 +1,143 @@
namespace CosmicExpansion.Tests;
public class UniverseTests
{
[Theory]
[MemberData(nameof(TestData.ParseTestData), MemberType = typeof(TestData))]
public void Parse_WhenGivenUniverseWithGalaxies_ItShouldReturnListOfGalaxies(string[] givenInput, Universe expectedUniverse)
{
var result = Universe.Parse(givenInput);
result.Should().BeEquivalentTo(expectedUniverse);
}
[Theory]
[MemberData(nameof(TestData.GetShortestPathsBetweenGalaxiesTestData), MemberType = typeof(TestData))]
public void GetShortestPathsBetweenGalaxies_WhenGivenUniverseWithGalaxies_ItShouldReturnShortestPathsBetweenGalaxies(Universe givenUniverse, int expectedNumberOrPaths)
{
var result = givenUniverse.GetShortestPathsBetweenGalaxies();
result.Count.Should().Be(expectedNumberOrPaths);
}
[Theory]
[MemberData(nameof(TestData.SumOfShortestPathsBetweenGalaxiesTestData), MemberType = typeof(TestData))]
public void SumOfShortestPathsBetweenGalaxies_WhenGivenUniverseWithGalaxies_ItShouldReturnSumOfShortestPathsBetweenGalaxies(Universe givenUniverse, int expectedSumOfShortestPaths)
{
givenUniverse.SumOfShortestPathsBetweenGalaxies.Should().Be(expectedSumOfShortestPaths);
}
[Theory]
[MemberData(nameof(TestData.CalculateDistanceBetweenGalaxiesTestData), MemberType = typeof(TestData))]
public void CalculateDistanceBetweenGalaxies_WhenGivenTwoGalaxies_ItShouldReturnDistanceBetweenGalaxies(Galaxy startGalaxy, Galaxy endGalaxy, int expectedDistance)
{
var result = Universe.CalculateDistanceBetweenGalaxies(startGalaxy, endGalaxy);
result.Should().Be(expectedDistance);
}
[Fact]
public void SumOfShortestPathsBetweenGalaxies_WhenGivenInput_ItShouldReturnSumOfShortestPathsBetweenGalaxies()
{
var input = File.ReadAllLines("INPUT.txt");
var universe = Universe.Parse(input);
universe.SumOfShortestPathsBetweenGalaxies.Should().Be(10292708);
}
[Fact]
public void SumOfShortestPathsBetweenGalaxies_WhenGivenInputAndIsPart2_ItShouldReturnSumOfShortestPathsBetweenGalaxies()
{
var input = File.ReadAllLines("INPUT.txt");
var universe = Universe.Parse(input, 1_000_000);
universe.SumOfShortestPathsBetweenGalaxies.Should().Be(790194712336);
}
public static class TestData
{
private static readonly Universe TestUniverse = new(
12,
13,
[
new(0, 4),
new(1, 9),
new(2, 0),
new(5, 8),
new(6, 1),
new(7, 12),
new(10, 9),
new(11, 0),
new(11, 5),
]
);
public static IEnumerable<object[]> ParseTestData =>
new List<object[]>
{
new object[]
{
new string[]
{
"...#......",
".......#..",
"#.........",
"..........",
"......#...",
".#........",
".........#",
"..........",
".......#..",
"#...#.....",
},
TestUniverse,
}
};
public static IEnumerable<object[]> GetShortestPathsBetweenGalaxiesTestData =>
new List<object[]>
{
new object[]
{
TestUniverse,
36,
}
};
public static IEnumerable<object[]> SumOfShortestPathsBetweenGalaxiesTestData =>
new List<object[]>
{
new object[]
{
TestUniverse,
374,
}
};
public static IEnumerable<object[]> CalculateDistanceBetweenGalaxiesTestData =>
new List<object[]>
{
new object[]
{
TestUniverse.Galaxies[4],
TestUniverse.Galaxies[8],
9,
},
new object[]
{
TestUniverse.Galaxies[0],
TestUniverse.Galaxies[6],
15,
},
new object[]
{
TestUniverse.Galaxies[2],
TestUniverse.Galaxies[5],
17,
},
new object[]
{
TestUniverse.Galaxies[7],
TestUniverse.Galaxies[8],
5,
}
};
}
}
11/CosmicExpansion/CosmicExpansion.csproj
+10
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@@ -0,0 +1,10 @@
<Project Sdk="Microsoft.NET.Sdk">
<PropertyGroup>
<OutputType>Exe</OutputType>
<TargetFramework>net8.0</TargetFramework>
<ImplicitUsings>enable</ImplicitUsings>
<Nullable>enable</Nullable>
</PropertyGroup>
</Project>
11/CosmicExpansion/Program.cs
+223
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@@ -0,0 +1,223 @@
using System.Diagnostics;
namespace CosmicExpansion;
public class Program
{
public static async Task<int> Main(string[] args)
{
if (args.Length is 0)
{
Console.WriteLine("Please provide a path to the input file.");
return -1;
}
if (File.Exists(args[0]) is false)
{
Console.WriteLine("The provided file does not exist.");
return -2;
}
var isPart2 = args.Length > 1 && args[1] == "part2";
var input = await File.ReadAllLinesAsync(args[0]);
var stopwatch = new Stopwatch();
stopwatch.Start();
var universe = isPart2
? Universe.Parse(input, 1_000_000)
: Universe.Parse(input);
var result = universe.SumOfShortestPathsBetweenGalaxies;
stopwatch.Stop();
Console.WriteLine($"The sum of the shortest paths between galaxies is {result}. ({stopwatch.ElapsedMilliseconds}ms)");
return (int)result;
}
}
/// <summary>
/// Represents the universe.
/// </summary>
/// <param name="Height">The height of the universe.</param>
/// <param name="Width">The width of the universe.</param>
/// <param name="Galaxies">The galaxies in the universe.</param>
/// <returns>An instance of <see cref="Universe"/>.</returns>
public class Universe(
int height,
int width,
List<Galaxy> galaxies
)
{
private const char GalaxySymbol = '#';
/// <summary>
/// Gets the height of the universe.
/// </summary>
public int Height { get; init; } = height;
/// <summary>
/// Gets the width of the universe.
/// </summary>
public int Width { get; init; } = width;
/// <summary>
/// Gets the galaxies in the universe.
/// </summary>
public List<Galaxy> Galaxies { get; init; } = galaxies;
/// <summary>
/// Gets the sum of the shortest paths between galaxies.
/// </summary>
public long SumOfShortestPathsBetweenGalaxies =>
GetShortestPathsBetweenGalaxies()
.Values
.Sum();
/// <summary>
/// Gets the shortest paths between all pairs of galaxies.
/// </summary>
/// <returns>A dictionary containing the shortest paths between galaxies.</returns>
public Dictionary<(int galaxyOneIndex, int galaxyTwoIndex), long> GetShortestPathsBetweenGalaxies()
{
var shortestPaths = new Dictionary<(int galaxyOneIndex, int galaxyTwoIndex), long>();
for (int i = 0; i < Galaxies.Count; i++)
{
var galaxyOne = Galaxies[i];
for (int j = i + 1; j < Galaxies.Count; j++)
{
var galaxyTwo = Galaxies[j];
if (shortestPaths.ContainsKey((i, j)) || shortestPaths.ContainsKey((j, i)))
{
continue;
}
var shortestPath = CalculateDistanceBetweenGalaxies(galaxyOne, galaxyTwo);
shortestPaths.Add((i, j), shortestPath);
}
}
return shortestPaths;
}
/// <summary>
/// Calculates the distance between two galaxies.
/// </summary>
/// <param name="galaxyOne">The first galaxy.</param>
/// <param name="galaxyTwo">The second galaxy.</param>
/// <returns>The distance between the two galaxies.</returns>
public static long CalculateDistanceBetweenGalaxies(Galaxy galaxyOne, Galaxy galaxyTwo) =>
Math.Abs(galaxyTwo.Row - galaxyOne.Row) + Math.Abs(galaxyTwo.Column - galaxyOne.Column);
/// <summary>
/// Parses the input into an instance of <see cref="Universe"/>.
/// </summary>
/// <param name="input">The input.</param>
/// <param name="expandFactor">The factor by which to expand the universe.</param>
/// <returns>An instance of <see cref="Universe"/>.</returns>
public static Universe Parse(string[] input, int expandFactor = 2)
{
var emptyRows = new List<int>();
var emptyColumns = new List<int>();
var galaxies = new List<Galaxy>();
for (int i = 0; i < input.Length; i++)
{
var currentRow = input[i];
if (currentRow.Contains(GalaxySymbol) is false)
{
emptyRows.Add(i);
}
}
for (int i = 0; i < input[0].Length; i++)
{
var galaxyInColumn = false;
for (int j = 0; j < input.Length; j++)
{
var currentPosition = input[j][i];
if (currentPosition == GalaxySymbol)
{
galaxyInColumn = true;
break;
}
}
if (galaxyInColumn is false)
{
emptyColumns.Add(i);
}
}
for (int i = 0; i < input.Length; i++)
{
var currentRow = input[i];
for (int j = 0; j < currentRow.Length; j++)
{
var currentPosition = currentRow[j];
if (currentPosition == GalaxySymbol)
{
var numOfEmptyRowsBefore = emptyRows.Where(row => row < i).Count();
var rowOffset = numOfEmptyRowsBefore is 0
? 0
: (numOfEmptyRowsBefore * expandFactor) - numOfEmptyRowsBefore;
var numOfEmptyColumnsBefore = emptyColumns.Where(column => column < j).Count();
var columnOffset = numOfEmptyColumnsBefore is 0
? 0
: (numOfEmptyColumnsBefore * expandFactor) - numOfEmptyColumnsBefore;
galaxies.Add(new Galaxy(i + rowOffset, j + columnOffset));
}
}
}
var heightOffset = emptyRows.Count is 0
? 0
: (emptyRows.Count * expandFactor) - emptyRows.Count;
var widthOffset = emptyColumns.Count is 0
? 0
: (emptyColumns.Count * expandFactor) - emptyColumns.Count;
var height = input.Length + heightOffset;
var width = input[0].Length + widthOffset;
return new Universe(
height,
width,
galaxies
);
}
}
/// <summary>
/// Represents a galaxy.
/// </summary>
/// <param name="Row">The row of the galaxy.</param>
/// <param name="Column">The column of the galaxy.</param>
/// <returns>An instance of <see cref="Galaxy"/>.</returns>
public class Galaxy(
long row,
long column
)
{
/// <summary>
/// Gets the row of the galaxy.
/// </summary>
public long Row { get; init; } = row;
/// <summary>
/// Gets the column of the galaxy.
/// </summary>
public long Column { get; init; } = column;
}
AdventOfCode2023.sln
+16
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@@ -63,6 +63,12 @@ Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "PipeMaze", "10\PipeMaze\Pip
EndProject
Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "PipeMaze.Tests", "10\PipeMaze.Tests\PipeMaze.Tests.csproj", "{B1DA407F-DA29-4BDA-B10E-8B9A976B0C5E}"
EndProject
Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "11", "11", "{01A6D73F-996E-48B3-B111-2725016A49C2}"
EndProject
Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "CosmicExpansion", "11\CosmicExpansion\CosmicExpansion.csproj", "{580A3C98-7A39-4323-839A-5C2E0B6E8E74}"
EndProject
Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "CosmicExpansion.Tests", "11\CosmicExpansion.Tests\CosmicExpansion.Tests.csproj", "{0D6CD658-65BB-47DC-A865-E3428EBE3075}"
EndProject
Global
GlobalSection(SolutionConfigurationPlatforms) = preSolution
Debug|Any CPU = Debug|Any CPU
@@ -152,6 +158,14 @@ Global
{B1DA407F-DA29-4BDA-B10E-8B9A976B0C5E}.Debug|Any CPU.Build.0 = Debug|Any CPU
{B1DA407F-DA29-4BDA-B10E-8B9A976B0C5E}.Release|Any CPU.ActiveCfg = Release|Any CPU
{B1DA407F-DA29-4BDA-B10E-8B9A976B0C5E}.Release|Any CPU.Build.0 = Release|Any CPU
{580A3C98-7A39-4323-839A-5C2E0B6E8E74}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
{580A3C98-7A39-4323-839A-5C2E0B6E8E74}.Debug|Any CPU.Build.0 = Debug|Any CPU
{580A3C98-7A39-4323-839A-5C2E0B6E8E74}.Release|Any CPU.ActiveCfg = Release|Any CPU
{580A3C98-7A39-4323-839A-5C2E0B6E8E74}.Release|Any CPU.Build.0 = Release|Any CPU
{0D6CD658-65BB-47DC-A865-E3428EBE3075}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
{0D6CD658-65BB-47DC-A865-E3428EBE3075}.Debug|Any CPU.Build.0 = Debug|Any CPU
{0D6CD658-65BB-47DC-A865-E3428EBE3075}.Release|Any CPU.ActiveCfg = Release|Any CPU
{0D6CD658-65BB-47DC-A865-E3428EBE3075}.Release|Any CPU.Build.0 = Release|Any CPU
EndGlobalSection
GlobalSection(NestedProjects) = preSolution
{3F8EAC09-4BC7-43AA-B72B-48DDD2710F6D} = {8C29858C-623A-461A-BF0B-254E151CD9C2}
@@ -174,5 +188,7 @@ Global
{5C39C115-ACBF-458A-9409-FBD23637A789} = {79203C8D-F382-4C95-90EA-FECEE65602DA}
{B46ADCFF-35FF-496D-A035-FE2B9FFC185A} = {9703A36A-A019-4ADC-93A7-9DF4EFBCBFBC}
{B1DA407F-DA29-4BDA-B10E-8B9A976B0C5E} = {9703A36A-A019-4ADC-93A7-9DF4EFBCBFBC}
{580A3C98-7A39-4323-839A-5C2E0B6E8E74} = {01A6D73F-996E-48B3-B111-2725016A49C2}
{0D6CD658-65BB-47DC-A865-E3428EBE3075} = {01A6D73F-996E-48B3-B111-2725016A49C2}
EndGlobalSection
EndGlobal
README.md
+1 -1
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@@ -54,7 +54,7 @@ dotnet build
| 08 | [Problem](./08/PROBLEM.md) | [Solution](./08/HauntedWasteland/) | ✅ | Got to implement a least common multiple algorithm for part 2. |
| 09 | [Problem](./09/PROBLEM.md) | [Solution](./09/MirageMaintenance/) | ✅ | Part 1 took me unnecessarily long. The bug was summing a line to check for all zeros is bad idea when negative numbers are involved. |
| 10 | [Problem](./10/PROBLEM.md) | [Solution](./10/PipeMaze/) | ✅ | So...my solutions are rather slow, but they work. Part 2 appears to have a mathematical solution, but scanning is what I came up with on my own. |
| 11 | [Problem](./11/PROBLEM.md) | [Solution](./11/) | ⌛ |
| 11 | [Problem](./11/PROBLEM.md) | [Solution](./11/CosmicExpansion/) | ✅ | Expanding the universe was fine in part 1, but part 2 showed I actually needed to calculate the expansion instead of expanding the input. |
| 12 | [Problem](./12/PROBLEM.md) | [Solution](./12/) | ⌛ |
| 13 | [Problem](./13/PROBLEM.md) | [Solution](./13/) | ⌛ |
| 14 | [Problem](./14/PROBLEM.md) | [Solution](./14/) | ⌛ |