2024 Day 04 setup

2024/day-03.php

@@ -5,8 +5,6 @@
 use adventofcode\Year2024\MultiplyInstructionParser;
 
 /**
- * --- Day 3: Mull It Over ---
- *
  * --- Day 3: Mull It Over ---
  *
  * "Our computers are having issues, so I have no idea if we have any Chief Historians in stock! You're welcome to

2024/day-04.php

@@ -0,0 +1,70 @@
+<?php
+
+require __DIR__ . '/../vendor/autoload.php';
+
+//use adventofcode\Year2024\WordSearch;
+
+/**
+ * --- Day 4: Ceres Search ---
+ *
+ * "Looks like the Chief's not here. Next!" One of The Historians pulls out a device and pushes the only button on it.
+ * After a brief flash, you recognize the interior of the Ceres monitoring station!
+ *
+ * As the search for the Chief continues, a small Elf who lives on the station tugs on your shirt; she'd like to know
+ * if you could help her with her word search (your puzzle input). She only has to find one word: XMAS.
+ *
+ * This word search allows words to be horizontal, vertical, diagonal, written backwards, or even overlapping
+ * other words. It's a little unusual, though, as you don't merely need to find one instance of XMAS - you need to
+ * find all of them. Here are a few ways XMAS might appear, where irrelevant characters have been replaced with .:
+ *
+ * ..X...
+ * .SAMX.
+ * .A..A.
+ * XMAS.S
+ * .X....
+ *
+ * The actual word search will be full of letters instead. For example:
+ *
+ * MMMSXXMASM
+ * MSAMXMSMSA
+ * AMXSXMAAMM
+ * MSAMASMSMX
+ * XMASAMXAMM
+ * XXAMMXXAMA
+ * SMSMSASXSS
+ * SAXAMASAAA
+ * MAMMMXMMMM
+ * MXMXAXMASX
+ *
+ * In this word search, XMAS occurs a total of 18 times; here's the same word search again, but where letters
+ * not involved in any XMAS have been replaced with .:
+ *
+ * ....XXMAS.
+ * .SAMXMS...
+ * ...S..A...
+ * ..A.A.MS.X
+ * XMASAMX.MM
+ * X.....XA.A
+ * S.S.S.S.SS
+ * .A.A.A.A.A
+ * ..M.M.M.MM
+ * .X.X.XMASX
+ *
+ * Take a look at the little Elf's word search. How many times does XMAS appear?
+ */
+
+//$multiplyInstructionParser = new MultiplyInstructionParser();
+//
+//$lines = file(__DIR__ . '/inputs/day-04.input', FILE_IGNORE_NEW_LINES);
+//
+//$sum = $multiplyInstructionParser->findMultiplyInstructionSum($lines);
+//print('The sum of the multiplier instructions from the given input is ' . $sum . ".\n");
+
+/**
+ * --- Part Two ---
+ *
+ *
+ */
+
+//$sum = $multiplyInstructionParser->findExtendedMultiplyInstructionSum($lines);
+//print('The sum of the extended multiplier instructions from the given input is ' . $sum . ".\n");

2024/inputs/day-04-sample.input

@@ -0,0 +1,10 @@
+MMMSXXMASM
+MSAMXMSMSA
+AMXSXMAAMM
+MSAMASMSMX
+XMASAMXAMM
+XXAMMXXAMA
+SMSMSASXSS
+SAXAMASAAA
+MAMMMXMMMM
+MXMXAXMASX