Advent of Code 2023 - Day 2 - Salesforce Apex

Day 2 was slightly less complicated than Day 1. Some string parsing and map collections helped with Part 1. Part 2 was similar parsing with a few edits to find the power of the minimum cube values.

--- Day 2: Cube Conundrum ---

https://adventofcode.com/2023/day/2

Advent Calendar Progress

Day 02 - Part 1

Day 02 - Part 1 Solution

	public with sharing class day02 {
	public static Map<String, Integer> maxTurnCubes = new Map<String, Integer>{
	'red' => 12,
	'green' => 13,
	'blue' => 14
	};
	public static Integer part1(List<String> puzzleInputLines) {
	Integer total = 0;
	Set<Integer> validGameNumbers = new Set<Integer>();
	for(String line : puzzleInputLines) {
	Integer gameNumber = Integer.valueOf(line.substring(line.indexOf(' ') + 1, line.indexOf(':')));
	validGameNumbers.add(gameNumber);
	String gameRounds = line.substring(line.indexOf(':') + 1, line.length());
	for(String round : gameRounds.split(';')) {
	for(String score : round.split(',')) {
	String numberColor = score.trim();
	String cubeNumber = numberColor.substring(0,numberColor.indexOf(' '));
	String cubeColor = numberColor.substring(numberColor.indexOf(' ') + 1, numberColor.length());
	if(maxTurnCubes.get(cubeColor) < Integer.valueOf(cubeNumber)) {
	validGameNumbers.remove(gameNumber);
	}
	}
	}
	}
	return sumValidGameNumbers(validGameNumbers);
	}
	private static Integer sumValidGameNumbers(Set<Integer> validGameNumbers) {
	Integer sum = 0;
	for(Integer val : validGameNumbers) {
	sum += val;
	}
	return sum;
	}
	}

view raw day02.cls hosted with ❤ by GitHub

Day 02 - Part 1 complete!

Day 02 - Part 2

Day 02 - Part 2 Solution

	public with sharing class day02 {
	public static Integer part2(List<String> puzzleInputLines) {
	Integer total = 0;
	for(String line : puzzleInputLines) {
	Map<String, Integer> maxGameCubesByColor = new Map<String, Integer>();
	Integer gameNumber = Integer.valueOf(line.substring(line.indexOf(' ') + 1, line.indexOf(':')));
	String gameRounds = line.substring(line.indexOf(':') + 1, line.length());
	for(String round : gameRounds.split(';')) {
	for(String score : round.split(',')) {
	String numberColor = score.trim();
	Integer cubeNumber = Integer.valueOf(numberColor.substring(0,numberColor.indexOf(' ')));
	String cubeColor = numberColor.substring(numberColor.indexOf(' ') + 1, numberColor.length());
	if(maxGameCubesByColor.get(cubeColor) == null) {
	maxGameCubesByColor.put(cubeColor, cubeNumber);
	}
	// if new highest cube number, put in map
	if(maxGameCubesByColor.get(cubeColor) < cubeNumber) {
	maxGameCubesByColor.put(cubeColor, cubeNumber);
	}
	}
	}
	total += powerOfMaxCubes(maxGameCubesByColor);
	}
	return total;
	}
	private static Integer powerOfMaxCubes(Map<String, Integer> maxGameCubesByColor) {
	Integer powerResult = maxGameCubesByColor.values()[0] * maxGameCubesByColor.values()[1] * maxGameCubesByColor.values()[2];
	return powerResult;
	}
	}

view raw day02.cls hosted with ❤ by GitHub

Day 02 - Part 2 complete!