Add day 1 '22 solution

data/Y22/day1/example.txt

@@ -0,0 +1,14 @@
+1000
+2000
+3000
+
+4000
+
+5000
+6000
+
+7000
+8000
+9000
+
+10000

data/Y22/day1/puzzle.md

@@ -0,0 +1,57 @@
+# Day 1: Calorie Counting
+
+[https://adventofcode.com/2022/day/1](https://adventofcode.com/2022/day/1)
+
+## Description
+
+### Part One
+
+Santa's reindeer typically eat regular reindeer food, but they need a lot of [magical energy](https://adventofcode.com/2018/day/25) to deliver presents on Christmas. For that, their favorite snack is a special type of _star_ fruit that only grows deep in the jungle. The Elves have brought you on their annual expedition to the grove where the fruit grows.
+
+To supply enough magical energy, the expedition needs to retrieve a minimum of _fifty stars_ by December 25th. Although the Elves assure you that the grove has plenty of fruit, you decide to grab any fruit you see along the way, just in case.
+
+Collect stars by solving puzzles. Two puzzles will be made available on each day in the Advent calendar; the second puzzle is unlocked when you complete the first. Each puzzle grants _one star_. Good luck!
+
+The jungle must be too overgrown and difficult to navigate in vehicles or access from the air; the Elves' expedition traditionally goes on foot. As your boats approach land, the Elves begin taking inventory of their supplies. One important consideration is food - in particular, the number of _Calories_ each Elf is carrying (your puzzle input).
+
+The Elves take turns writing down the number of Calories contained by the various meals, snacks, rations, <span title="By &quot;etc&quot;, you're pretty sure they just mean &quot;more snacks&quot;.">etc.</span> that they've brought with them, one item per line. Each Elf separates their own inventory from the previous Elf's inventory (if any) by a blank line.
+
+For example, suppose the Elves finish writing their items' Calories and end up with the following list:
+
+    1000
+    2000
+    3000
+    
+    4000
+    
+    5000
+    6000
+    
+    7000
+    8000
+    9000
+    
+    10000
+
+
+This list represents the Calories of the food carried by five Elves:
+
+*   The first Elf is carrying food with `1000`, `2000`, and `3000` Calories, a total of `6000` Calories.
+*   The second Elf is carrying one food item with `4000` Calories.
+*   The third Elf is carrying food with `5000` and `6000` Calories, a total of `11000` Calories.
+*   The fourth Elf is carrying food with `7000`, `8000`, and `9000` Calories, a total of `24000` Calories.
+*   The fifth Elf is carrying one food item with `10000` Calories.
+
+In case the Elves get hungry and need extra snacks, they need to know which Elf to ask: they'd like to know how many Calories are being carried by the Elf carrying the _most_ Calories. In the example above, this is `24000` (carried by the fourth Elf).
+
+Find the Elf carrying the most Calories. _How many total Calories is that Elf carrying?_
+
+### Part Two
+
+By the time you calculate the answer to the Elves' question, they've already realized that the Elf carrying the most Calories of food might eventually _run out of snacks_.
+
+To avoid this unacceptable situation, the Elves would instead like to know the total Calories carried by the _top three_ Elves carrying the most Calories. That way, even if one of those Elves runs out of snacks, they still have two backups.
+
+In the example above, the top three Elves are the fourth Elf (with `24000` Calories), then the third Elf (with `11000` Calories), then the fifth Elf (with `10000` Calories). The sum of the Calories carried by these three elves is `45000`.
+
+Find the top three Elves carrying the most Calories. _How many Calories are those Elves carrying in total?_

src/Solution.php

@@ -14,6 +14,11 @@ abstract class Solution
 
     public static int|string|null $part2Result = null;
 
+    /**
+     * @var bool When false, do not apply the `array_filter` function when the data is loaded.
+     */
+    public bool $filterDataOnLoad = true;
+
     /**
      * @var string[] The data to use.
      *
@@ -60,14 +65,14 @@ abstract class Solution
         if (file_exists($dataFile)) {
             $data = file_get_contents($dataFile);
             if ($data !== false) {
-                $this->data = array_filter(explode(PHP_EOL, $data));
+                $this->data = $this->filterDataOnLoad ? array_filter(explode(PHP_EOL, $data)) : explode(PHP_EOL, $data);
             }
         }
 
         if (file_exists($dataExampleFile)) {
             $data = file_get_contents($dataExampleFile);
             if ($data !== false) {
-                $this->exampleData = array_filter(explode(PHP_EOL, $data));
+                $this->exampleData = $this->filterDataOnLoad ? array_filter(explode(PHP_EOL, $data)) : explode(PHP_EOL, $data);
             }
         }
     }

src/Y22/Day1.php

@@ -0,0 +1,55 @@
+<?php
+
+namespace trizz\AdventOfCode\Y22;
+
+use trizz\AdventOfCode\Solution;
+
+final class Day1 extends Solution
+{
+    public static int|string|null $part1ExampleResult = 24000;
+
+    public static int|string|null $part1Result = 72240;
+
+    public static int|string|null $part2ExampleResult = 45000;
+
+    public static int|string|null $part2Result = 210957;
+
+    public bool $filterDataOnLoad = false;
+
+    public function part1(array $data): int
+    {
+        return $this->calculateCalories($data)[0];
+    }
+
+    public function part2(array $data): int
+    {
+        $results = $this->calculateCalories($data);
+
+        return $results[0] + $results[1] + $results[2];
+    }
+
+    /**
+     * @param string[] $data
+     *
+     * @return int[]
+     */
+    private function calculateCalories(array $data): array
+    {
+        $results = [];
+        $tmpResult = 0;
+        foreach ($data as $value) {
+            if ($value !== '') {
+                $tmpResult += (int) $value;
+
+                continue;
+            }
+
+            $results[] = $tmpResult;
+            $tmpResult = 0;
+        }
+
+        rsort($results);
+
+        return $results;
+    }
+}