Add day 1 '24

data/Y24/day1/Day1.php

@@ -0,0 +1,61 @@
+<?php
+
+namespace trizz\AdventOfCode\Y24;
+
+use trizz\AdventOfCode\Solution;
+
+final class Day1 extends Solution
+{
+    public static null|int|string $part1ExampleResult = 11;
+    public static null|int|string $part1Result = 1882714;
+    public static null|int|string $part2ExampleResult = 31;
+    public static null|int|string $part2Result = null;
+
+    public function part1(array $data): int
+    {
+        [$listLeft, $listRight] = $this->getList($data);
+        $score = 0;
+        foreach ($listLeft as $index => $left) {
+            $right = $listRight[$index];
+            $score += abs($left - $right);
+        }
+
+        return $score;
+    }
+
+    public function part2(array $data): int
+    {
+        $score = 0;
+        [$listLeft, $listRight] = $this->getList($data);
+
+        foreach ($listLeft as $index => $left) {
+            $right = count(array_filter($listRight, fn ($x) => $x === $left));
+            if ($right > 0) {
+                $score += $left * $right;
+            }
+        }
+
+        return $score;
+    }
+
+    /**
+     * @param array<int,string> $data
+     *
+     * @return array<int,int[]>
+     */
+    private function getList(array $data): array
+    {
+        $listLeft = [];
+        $listRight = [];
+        foreach ($data as $x) {
+            [$a1, $_, $_, $b1] = explode(' ', $x);
+            $listLeft[] = (int) $a1;
+            $listRight[] = (int) $b1;
+        }
+
+        sort($listLeft);
+        sort($listRight);
+
+        return [$listLeft, $listRight];
+    }
+}

data/Y24/day1/example.txt

@@ -0,0 +1,7 @@
+3   4
+4   3
+2   5
+1   3
+3   9
+3   3
+