Added solution for "Day 14: Parabolic Reflector Dish", part 1

This commit is contained in:
Stefan Müller 2023-12-14 17:51:12 +01:00 committed by Stefan Müller
parent 01267c8f79
commit f9583e684d
6 changed files with 252 additions and 5 deletions

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@ -89,6 +89,10 @@
<Filename Value="solvers\UPointOfIncidence.pas"/>
<IsPartOfProject Value="True"/>
</Unit>
<Unit>
<Filename Value="solvers\UParabolicReflectorDish.pas"/>
<IsPartOfProject Value="True"/>
</Unit>
</Units>
</ProjectOptions>
<CompilerOptions>

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@ -23,10 +23,9 @@ uses
{$IFDEF UNIX}
cthreads,
{$ENDIF}
Classes, SysUtils, CustApp,
USolver,
UTrebuchet, UCubeConundrum, UGearRatios, UScratchcards, UGiveSeedFertilizer, UWaitForIt, UCamelCards,
UHauntedWasteland, UNumberTheory, UMirageMaintenance, UPipeMaze, UCosmicExpansion, UHotSprings, UPointOfIncidence;
Classes, SysUtils, CustApp, USolver, UTrebuchet, UCubeConundrum, UGearRatios, UScratchcards, UGiveSeedFertilizer,
UWaitForIt, UCamelCards, UHauntedWasteland, UNumberTheory, UMirageMaintenance, UPipeMaze, UCosmicExpansion,
UHotSprings, UPointOfIncidence, UParabolicReflectorDish;
type
@ -64,6 +63,7 @@ begin
engine.RunAndFree(TCosmicExpansion.Create);
engine.RunAndFree(THotSprings.Create);
engine.RunAndFree(TPointOfIncidence.Create);
engine.RunAndFree(TParabolicReflectorDish.Create);
engine.Free;
end;

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@ -0,0 +1,161 @@
{
Solutions to the Advent Of Code.
Copyright (C) 2023 Stefan Müller
This program is free software: you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free Software
Foundation, either version 3 of the License, or (at your option) any later
version.
This program is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License along with
this program. If not, see <http://www.gnu.org/licenses/>.
}
unit UParabolicReflectorDish;
{$mode ObjFPC}{$H+}
interface
uses
Classes, SysUtils, Generics.Collections, USolver;
const
CRoundRockChar = 'O';
CCubeRockChar = '#';
type
{ TRockPile }
TRockPile = class
private
FStart, FLength: Integer;
public
constructor Create(const AStart: Integer);
procedure AddRock;
function Any: Boolean;
procedure SetStart(const AStart: Integer);
function CalcWeight(const ALineCount: Integer): Integer;
end;
TRockPiles = specialize TObjectList<TRockPile>;
{ TParabolicReflectorDish }
TParabolicReflectorDish = class(TSolver)
private
FLineIndex: Integer;
FActivePiles, FFinishedPiles: TRockPiles;
public
constructor Create;
destructor Destroy; override;
procedure ProcessDataLine(const ALine: string); override;
procedure Finish; override;
function GetDataFileName: string; override;
function GetPuzzleName: string; override;
end;
implementation
{ TRockPile }
constructor TRockPile.Create(const AStart: Integer);
begin
FStart := AStart;
FLength := 0;
end;
procedure TRockPile.AddRock;
begin
Inc(FLength);
end;
function TRockPile.Any: Boolean;
begin
Result := (FLength > 0);
end;
procedure TRockPile.SetStart(const AStart: Integer);
begin
FStart := AStart;
end;
function TRockPile.CalcWeight(const ALineCount: Integer): Integer;
begin
Result := (2 * (ALineCount - FStart) - FLength + 1) * FLength div 2;
end;
{ TParabolicReflectorDish }
constructor TParabolicReflectorDish.Create;
begin
FLineIndex := 0;
FActivePiles := TRockPiles.Create;
FFinishedPiles := TRockPiles.Create;
end;
destructor TParabolicReflectorDish.Destroy;
begin
FActivePiles.Free;
FFinishedPiles.Free;
inherited Destroy;
end;
procedure TParabolicReflectorDish.ProcessDataLine(const ALine: string);
var
i: Integer;
begin
Inc(FLineIndex);
// Initializes the list of active piles, one per column.
if FActivePiles.Count = 0 then
begin
FActivePiles.Count := Length(ALine);
for i:= 0 to FActivePiles.Count - 1 do
FActivePiles[i] := TRockPile.Create(0);
end;
// Updates the active piles from the current line.
for i := 1 to Length(ALine) do
begin
case ALine[i] of
CRoundRockChar: FActivePiles[i - 1].AddRock;
CCubeRockChar:
if FActivePiles[i - 1].Any then
begin
FFinishedPiles.Add(FActivePiles.ExtractIndex(i - 1));
FActivePiles.Insert(i - 1, TRockPile.Create(FLineIndex));
end
else
FActivePiles[i - 1].SetStart(FLineIndex);
end;
end;
end;
procedure TParabolicReflectorDish.Finish;
var
i: Integer;
begin
for i := 0 to FFinishedPiles.Count - 1 do
Inc(FPart1, FFinishedPiles[i].CalcWeight(FLineIndex));
for i := 0 to FActivePiles.Count - 1 do
Inc(FPart1, FActivePiles[i].CalcWeight(FLineIndex));
end;
function TParabolicReflectorDish.GetDataFileName: string;
begin
Result := 'parabolic_reflector_dish.txt';
end;
function TParabolicReflectorDish.GetPuzzleName: string;
begin
Result := 'Day 14: Parabolic Reflector Dish';
end;
end.

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@ -96,6 +96,10 @@
<Filename Value="UPointOfIncidenceTestCases.pas"/>
<IsPartOfProject Value="True"/>
</Unit>
<Unit>
<Filename Value="UParabolicReflectorDishTestCases.pas"/>
<IsPartOfProject Value="True"/>
</Unit>
</Units>
</ProjectOptions>
<CompilerOptions>

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@ -6,7 +6,7 @@ uses
Interfaces, Forms, GuiTestRunner, USolver, UBaseTestCases, UTrebuchetTestCases, UCubeConundrumTestCases,
UGearRatiosTestCases, UScratchcardsTestCases, UGiveSeedFertilizerTestCases, UWaitForItTestCases, UCamelCardsTestCases,
UHauntedWastelandTestCases, UMirageMaintenanceTestCases, UPipeMazeTestCases, UCosmicExpansionTestCases,
UHotSpringsTestCases, UPointOfIncidenceTestCases;
UHotSpringsTestCases, UPointOfIncidenceTestCases, UParabolicReflectorDishTestCases;
{$R *.res}

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@ -0,0 +1,78 @@
{
Solutions to the Advent Of Code.
Copyright (C) 2023 Stefan Müller
This program is free software: you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free Software
Foundation, either version 3 of the License, or (at your option) any later
version.
This program is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License along with
this program. If not, see <http://www.gnu.org/licenses/>.
}
unit UParabolicReflectorDishTestCases;
{$mode ObjFPC}{$H+}
interface
uses
Classes, SysUtils, fpcunit, testregistry, USolver, UBaseTestCases, UParabolicReflectorDish;
type
{ TParabolicReflectorDishFullDataTestCase }
TParabolicReflectorDishFullDataTestCase = class(TEngineBaseTest)
protected
function CreateSolver: ISolver; override;
published
procedure TestPart1;
end;
{ TParabolicReflectorDishExampleTestCase }
TParabolicReflectorDishExampleTestCase = class(TExampleEngineBaseTest)
protected
function CreateSolver: ISolver; override;
published
procedure TestPart1;
end;
implementation
{ TParabolicReflectorDishFullDataTestCase }
function TParabolicReflectorDishFullDataTestCase.CreateSolver: ISolver;
begin
Result := TParabolicReflectorDish.Create;
end;
procedure TParabolicReflectorDishFullDataTestCase.TestPart1;
begin
AssertEquals(-1, FSolver.GetResultPart1);
end;
{ TParabolicReflectorDishExampleTestCase }
function TParabolicReflectorDishExampleTestCase.CreateSolver: ISolver;
begin
Result := TParabolicReflectorDish.Create;
end;
procedure TParabolicReflectorDishExampleTestCase.TestPart1;
begin
AssertEquals(136, FSolver.GetResultPart1);
end;
initialization
RegisterTest(TParabolicReflectorDishFullDataTestCase);
RegisterTest(TParabolicReflectorDishExampleTestCase);
end.