AoC2023/Day 5/main.cpp

#pragma region Hidden Setup Stuff
#define OLC_PGE_APPLICATION
#include "olcPixelGameEngine.h"

using namespace olc;

enum Run{
	FILE1,
	FILE2
};

// Override base class with your custom functionality
class AoC2023 : public olc::PixelGameEngine
{
std::vector<std::string>lines;
bool waitForRender=false;

void wait(int pauseMs=0){
	waitForRender=true;
	while(waitForRender);
	std::this_thread::sleep_for(std::chrono::milliseconds(pauseMs));
}

#pragma endregion

const int DAY = 5;
Run runInput=FILE2;

struct Seed{
	long long val;
	long long range;
	bool found=false;
};

struct Transform{
	long long source;
	long long range;
	long long dest;
};


void doStuff(){
	while(true){ //lines is accessible as a global.
		long long smallest=0;
		bool firstLine=true;
		std::vector<Seed>seeds;
		std::vector<std::vector<Transform>>transforms;
		bool newTransform=false;
		for(std::string&line:lines){
			if(firstLine){
				firstLine=false;
				bool IsNumber=true;
				std::string seedNumbers=line.substr(6);
				while(seedNumbers.find(' ',1)!=std::string::npos){
					size_t spacePos=seedNumbers.find(' ',1);
					long long numb=atoll(seedNumbers.substr(1,spacePos).c_str());
					if(IsNumber){
						seeds.push_back({numb});
					}else{
						Seed&prevSeed=seeds[seeds.size()-1];
						prevSeed.range=numb;
						if(prevSeed.val+prevSeed.range-1>smallest)smallest=prevSeed.val+prevSeed.range-1;
					}
					IsNumber=!IsNumber;
					seedNumbers=seedNumbers.substr(spacePos);
				}
				long long numb=atoll(seedNumbers.substr(1).c_str());
				if(IsNumber){
					seeds.push_back({numb});
				}else{
					Seed&prevSeed=seeds[seeds.size()-1];
					prevSeed.range=numb;
					if(prevSeed.val+prevSeed.range-1>smallest)smallest=prevSeed.val+prevSeed.range-1;
				}
			}else
			if(line.length()>0){
				if(newTransform&&line[0]>='0'&&line[0]<='9'){//This is a conversion
					std::vector<Transform>&currentTransform=transforms[transforms.size()-1];
					size_t spacePos=line.find(' ');
					long long dest=atoll(line.substr(0,spacePos).c_str());
					size_t prevSpacePos=spacePos;
					spacePos=line.find(' ',prevSpacePos+1);
					long long source=atoll(line.substr(prevSpacePos+1,spacePos).c_str());
					prevSpacePos=spacePos;
					spacePos=line.find(' ',prevSpacePos+1);
					long long distance=atoll(line.substr(prevSpacePos+1,spacePos).c_str());
					currentTransform.push_back({source,distance,dest});
				}else{
					//No-op, skip non-number line.
					/*for(Seed&seed:seeds){
						std::cout<<seed.val<<' ';
					}
					std::cout<<std::endl<<std::endl;*/
					transforms.push_back({});
					newTransform=true;
					for(Seed&seed:seeds){
						seed.found=false;
					}
				}
			}
		}
		
		for(Seed&seed:seeds){
			for(long long originalNumb=seed.val;originalNumb<seed.val+seed.range;originalNumb++){
				long long seedNumb=originalNumb;
				//std::cout<<"Initial Number: "<<seedNumb<<' ';
				for(std::vector<Transform>&transformList:transforms){
					for(Transform&transform:transformList){
						if(seedNumb>=transform.source&&seedNumb<transform.source+transform.range){
							seedNumb+=transform.dest-transform.source;
							break;
						}
					}
					//std::cout<<seedNumb<<" ";
				}
				//std::cout<<"Number Out: "<<seedNumb<<std::endl;
				if(seedNumb<smallest)smallest=seedNumb;
			}
		}
		std::cout<<smallest<<std::endl;
		break;
		//wait(0); //Wait for 0ms and render the screen (calls draw())
	}
}

void draw(){ //Only use Sprites! If using decals, you must reference global variables!
	Clear(BLACK);
	int count=0;
	for(std::string&line:lines){
		DrawString({0,count*32},line,WHITE,4);
		count++;
	}
}

#pragma region Hidden Engine Stuff
public:
	AoC2023()
	{
		// Name your application
		std::string fileName="day"+std::to_string(DAY)+"_1.txt";
		if(runInput==FILE2){fileName="day"+std::to_string(DAY)+"_2.txt";}
		std::ifstream file(fileName);
		while(file.good()){
			std::string line;
			std::getline(file,line);
			lines.push_back(line);
		}

		sAppName = "Advent of Code 2023 - Day "+std::to_string(DAY);
	}

public:
	bool OnUserCreate() override
	{

		return true;
	}

	bool OnUserUpdate(float fElapsedTime) override
	{
		static std::thread aocSolver(&AoC2023::doStuff,this);

		if(waitForRender){
			draw();
			waitForRender=false;
		}
		return true;
	}
};

int main()
{
	AoC2023 game;
	if (game.Construct(640, 480, 2,2))
		game.Start();
	return 0;
}
#pragma endregion