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Added Day 9 code and input
continuous-integration/drone/push Build is passing Details

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master
Alexander Sigler 3 years ago
parent 636616b703
commit e381eb3d37
9 changed files with 308 additions and 15 deletions
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6
AOC2021.Test/AOC2021.Test.csproj
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@ -66,6 +66,12 @@
<None Update="Input\Day8_test.txt"> <None Update="Input\Day8_test.txt">
<CopyToOutputDirectory>Always</CopyToOutputDirectory> <CopyToOutputDirectory>Always</CopyToOutputDirectory>
</None> </None>
<None Update="Input\Day9_input.txt">
<CopyToOutputDirectory>Always</CopyToOutputDirectory>
</None>
<None Update="Input\Day9_test.txt">
<CopyToOutputDirectory>Always</CopyToOutputDirectory>
</None>
</ItemGroup> </ItemGroup>
</Project> </Project>

8
AOC2021.Test/AOCTester.cs
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@ -18,20 +18,20 @@ namespace AOC2021.Test
Console.WriteLine($"Testing {request.Day} Part A, Test data"); Console.WriteLine($"Testing {request.Day} Part A, Test data");
if (!string.IsNullOrEmpty(request.Answer.Day_A_Test)) if (!string.IsNullOrEmpty(request.Answer.Day_A_Test))
response.Answer.Day_A_Test = GetAOCDay(request.Day).ExecuteDay(new AOCRequest() { Input = test, Version = AOCVersion.A }).Answer.ToString(); response.Answer.Day_A_Test = GetAOCDay(request.Day).ExecuteDay(new AOCRequest() { Input = test, Version = AOCVersion.A, IgnoreLogMessages = true }).Answer.ToString();
Console.WriteLine(response.Answer.Day_A_Test); Console.WriteLine(response.Answer.Day_A_Test);
Console.WriteLine($"Testing {request.Day} Part A, Input data"); Console.WriteLine($"Testing {request.Day} Part A, Input data");
if (!string.IsNullOrEmpty(request.Answer.Day_A_Input)) if (!string.IsNullOrEmpty(request.Answer.Day_A_Input))
response.Answer.Day_A_Input = GetAOCDay(request.Day).ExecuteDay(new AOCRequest() { Input = input, Version = AOCVersion.A }).Answer.ToString(); response.Answer.Day_A_Input = GetAOCDay(request.Day).ExecuteDay(new AOCRequest() { Input = input, Version = AOCVersion.A, IgnoreLogMessages = true }).Answer.ToString();
Console.WriteLine(response.Answer.Day_A_Input); Console.WriteLine(response.Answer.Day_A_Input);
Console.WriteLine($"Testing {request.Day} Part B, Test data"); Console.WriteLine($"Testing {request.Day} Part B, Test data");
if (!string.IsNullOrEmpty(request.Answer.Day_B_Test)) if (!string.IsNullOrEmpty(request.Answer.Day_B_Test))
response.Answer.Day_B_Test = GetAOCDay(request.Day).ExecuteDay(new AOCRequest() { Input = test, Version = AOCVersion.B }).Answer.ToString(); response.Answer.Day_B_Test = GetAOCDay(request.Day).ExecuteDay(new AOCRequest() { Input = test, Version = AOCVersion.B, IgnoreLogMessages = true }).Answer.ToString();
Console.WriteLine(response.Answer.Day_B_Test); Console.WriteLine(response.Answer.Day_B_Test);
Console.WriteLine($"Testing {request.Day} Part B, Input data"); Console.WriteLine($"Testing {request.Day} Part B, Input data");
if (!string.IsNullOrEmpty(request.Answer.Day_B_Input)) if (!string.IsNullOrEmpty(request.Answer.Day_B_Input))
response.Answer.Day_B_Input = GetAOCDay(request.Day).ExecuteDay(new AOCRequest() { Input = input, Version = AOCVersion.B }).Answer.ToString(); response.Answer.Day_B_Input = GetAOCDay(request.Day).ExecuteDay(new AOCRequest() { Input = input, Version = AOCVersion.B, IgnoreLogMessages = true }).Answer.ToString();
Console.WriteLine(response.Answer.Day_B_Input); Console.WriteLine(response.Answer.Day_B_Input);
return response; return response;
} }

10
AOC2021.Test/DayTest.cs
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@ -76,7 +76,15 @@ namespace AOC2021.Tests
[TestMethod] [TestMethod]
public void Day8() public void Day8()
{ {
var request = new TestRequest() { Day = "day8", Answer = new Answer() { Day_A_Test = "26", Day_A_Input = "543", Day_B_Test = "", Day_B_Input = "" } }; var request = new TestRequest() { Day = "day8", Answer = new Answer() { Day_A_Test = "26", Day_A_Input = "543", Day_B_Test = "61229", Day_B_Input = "994266" } };
var result = _tester.Test(request);
Assert.IsTrue(request.Answer.Equals(result.Answer));
}
[TestMethod]
public void Day9()
{
var request = new TestRequest() { Day = "day9", Answer = new Answer() { Day_A_Test = "15", Day_A_Input = "577", Day_B_Test = "1134", Day_B_Input = "1069200" } };
var result = _tester.Test(request); var result = _tester.Test(request);
Assert.IsTrue(request.Answer.Equals(result.Answer)); Assert.IsTrue(request.Answer.Equals(result.Answer));
} }

100
AOC2021.Test/Input/Day9_input.txt
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@ -0,0 +1,100 @@
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5
AOC2021.Test/Input/Day9_test.txt
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@ -0,0 +1,5 @@
2199943210
3987894921
9856789892
8767896789
9899965678

1
AOC2021/Controllers/AdventOfCodeController.cs
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@ -27,6 +27,7 @@ namespace AOC2021.Controllers
[Route("day6")] [Route("day6")]
[Route("day7")] [Route("day7")]
[Route("day8")] [Route("day8")]
[Route("day9")]
public AOCResponse Day(AOCVersion version, [FromBody] string input, bool IgnoreLogMessages = false) public AOCResponse Day(AOCVersion version, [FromBody] string input, bool IgnoreLogMessages = false)
{ {
AOCRequest request = new AOCRequest() { Input = input, Version = version, IgnoreLogMessages = IgnoreLogMessages }; AOCRequest request = new AOCRequest() { Input = input, Version = version, IgnoreLogMessages = IgnoreLogMessages };

15
AOC2021/Days/Day8.cs
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@ -32,10 +32,17 @@ namespace AOC2021.Days
protected override AOCResponse ExecutePartB() protected override AOCResponse ExecutePartB()
{ {
//be cfbegad cbdgef fgaecd cgeb fdcge agebfd fecdb fabcd edb var sum = 0;
new SSDGenerator("be cfbegad cbdgef fgaecd cgeb fdcge agebfd fecdb fabcd edb").Generate(); foreach (var line in GetSplitInput())
{
var inputNumbers = line.Split("|")[0].Trim();
var outputDigits = line.Split("|")[1].Trim();
var ssdGenerator = new SSDGenerator(inputNumbers);
ssdGenerator.Generate();
var digits = ssdGenerator.ConvertToNumbers(outputDigits);
sum += Convert.ToInt32(digits);
}
this._response.Answer = sum;
return this._response; return this._response;
} }
} }

122
AOC2021/Days/Day9.cs
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@ -0,0 +1,122 @@
using AOC2021.Models;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
namespace AOC2021.Days
{
public class Day9 : AOCDay
{
private int[][] _board;
private int _rowCount, _colCount;
protected override AOCResponse ExecutePartA()
{
CreateBoard();
int riskCount = 0;
var lowPoints = FindLowPoints();
foreach (var lP in lowPoints)
{
riskCount += 1 + _board[lP.Item1][lP.Item2];
}
this._response.Answer = riskCount;
return this._response;
}
protected override AOCResponse ExecutePartB()
{
CreateBoard();
var lowPoints = FindLowPoints();
var basinCount = new List<int>();
foreach (var lP in lowPoints)
{
var basin = GetBasin(lP.Item1, lP.Item2);
basinCount.Add(basin.Count());
Log($"LP: {lP.Item1},{lP.Item2} has a basin size of {basin.Count()}");
Log(string.Join(" ", basin.Select(bP => "(" + bP.Item1 + ", " + bP.Item2 + ")")));
}
//Order by int then take the top 3, and then multiple them together.
var product = basinCount.OrderByDescending(x => x).Take(3).Aggregate((total, next) => total * next);
this._response.Answer = product;
return this._response;
}
private List<Tuple<int,int>> FindLowPoints()
{
var lowPoints = new List<Tuple<int, int>>();
for (int x = 0; x < _rowCount; x++)
{
for (int y = 0; y < _colCount; y++)
{
var surround = GetSurroundingPositions(x, y);
bool isLowest = true;
foreach (var t in surround)
{
if (_board[x][y] >= _board[t.Item1][t.Item2])
isLowest = false;
}
if (isLowest)
{
lowPoints.Add(Tuple.Create(x, y));
Log($"{x},{y} is a low point with value {_board[x][y]}!");
}
}
}
return lowPoints;
}
private List<Tuple<int,int>> GetSurroundingPositions(int row, int column)
{
var positions = new List<Tuple<int, int>>();
for (int i = -1; i <= 1; i+=2)
{
if (row + i < _rowCount && row + i >= 0)
positions.Add(new Tuple<int, int>(row + i, column));
if (column + i < _colCount && column + i >= 0)
positions.Add(new Tuple<int, int>(row, column + i));
}
return positions;
}
private List<Tuple<int,int>> GetBasin(int x, int y)
{
List<Tuple<int, int>> basin = new List<Tuple<int, int>>();
AddBasin(Tuple.Create(x, y), basin);
return basin.Distinct().ToList();
}
private void AddBasin(Tuple<int,int> point, List<Tuple<int,int>> list)
{
foreach (var t in GetSurroundingPositionsThatAreNotNine(point.Item1, point.Item2).Except(list))
{
list.Add(t);
AddBasin(t, list);
}
}
private IEnumerable<Tuple<int, int>> GetSurroundingPositionsThatAreNotNine(int row, int column)
{
var positions = GetSurroundingPositions(row, column);
return positions.Where(x => _board[x.Item1][x.Item2] != 9);
}
private void CreateBoard()
{
var rows = new List<int[]>();
foreach (var line in GetSplitInput())
{
var columns = new List<int>();
foreach (var c in line)
{
columns.Add(Convert.ToInt32(c.ToString()));
}
rows.Add(columns.ToArray());
}
_colCount = rows[0].Length;
_rowCount = rows.Count;
_board = rows.ToArray();
}
}
}

56
AOC2021/Models/Day8/SSDGenerator.cs
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@ -31,6 +31,28 @@ namespace AOC2021.Models.Day8
_possibleLookup[ssd] = new List<SSD>(); _possibleLookup[ssd] = new List<SSD>();
} }
} }
public string ConvertToNumbers(string numbers)
{
var number = "";
foreach (var segments in numbers.Split(" "))
{
var constructedDigit = "";
foreach (var seg in segments)
{
foreach (var l in _lookup)
{
if (l.Value == GetProperCode(seg))
{
constructedDigit += GetProperCode(l.Key);
break;
}
}
}
number += ConvertToDigit(constructedDigit);
}
return number;
}
public void Generate() public void Generate()
{ {
var one = GetPossibleNumbers(ONE).First(); var one = GetPossibleNumbers(ONE).First();
@ -56,17 +78,12 @@ namespace AOC2021.Models.Day8
_possibleLookup[SSD.G] = GetPossibleSSD(possibleValuesForSegmentDG); _possibleLookup[SSD.G] = GetPossibleSSD(possibleValuesForSegmentDG);
DeducePossibleLookups(); //Since we have overlapping possible values, we deduce the correct ones and simplify DeducePossibleLookups(); //Since we have overlapping possible values, we deduce the correct ones and simplify
PrintOutLookup();
//Now we address the ones with 6 segments, #0, #6, #9. They all have the same possible numbers, so just use #0 as lookup //Now we address the ones with 6 segments, #0, #6, #9. They all have the same possible numbers, so just use #0 as lookup
var zeroSixNinePossible = GetPossibleNumbers(ZERO); var zeroSixNinePossible = GetPossibleNumbers(ZERO);
var simplifiedZeroSixNine = zeroSixNinePossible.Select(x => RemoveKnownSSD(x)).ToArray(); var simplifiedZeroSixNine = zeroSixNinePossible.Select(x => RemoveKnownSSD(x)).ToArray(); //Remove all known values
var possibleValuesForSegmentF = FindInCommon(simplifiedZeroSixNine); //F segment is in common with 0, 6, 9. var possibleValuesForSegmentF = FindInCommon(simplifiedZeroSixNine); //F segment is in common with 0, 6, 9.
_lookup[SSD.F] = GetProperCode(possibleValuesForSegmentF[0]); //Its a single char since its the only one in common with all 3 digits _lookup[SSD.F] = GetProperCode(possibleValuesForSegmentF[0]); //Its a single char since its the only one in common with all 3 digits
PrintOutLookup();
DeducePossibleLookups(); DeducePossibleLookups();
PrintOutLookup();
foreach (var l in simplifiedZeroSixNine)
Console.WriteLine(l);
} }
private void DeducePossibleLookups() private void DeducePossibleLookups()
@ -281,6 +298,33 @@ namespace AOC2021.Models.Day8
return 'g'; return 'g';
return ' '; return ' ';
} }
private int ConvertToDigit(string s)
{
char[] characters = s.ToArray();
Array.Sort(characters);
s = new string(characters);
if (s.Equals(ZERO))
return 0;
if (s.Equals(ONE))
return 1;
if (s.Equals(TWO))
return 2;
if (s.Equals(THREE))
return 3;
if (s.Equals(FOUR))
return 4;
if (s.Equals(FIVE))
return 5;
if (s.Equals(SIX))
return 6;
if (s.Equals(SEVEN))
return 7;
if (s.Equals(EIGHT))
return 8;
if (s.Equals(NINE))
return 9;
return -1;
}
} }
} }

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