10th day both parts

2021-12-10 20:06:15 +01:00
parent 5fb4286103
commit c57c4c5f1d
4 changed files with 181 additions and 1 deletions
--- a/10/part1.php
+++ b/10/part1.php
@@ -0,0 +1,33 @@
+<?php
+$input = file('input', FILE_IGNORE_NEW_LINES | FILE_SKIP_EMPTY_LINES);
+$input = array_map('str_split', $input);
+
+$chunkPairs = [
+    ')' => '(',
+    ']' => '[',
+    '>' => '<',
+    '}' => '{',
+];
+$illegalValues = [
+    ')' => 3,
+    ']' => 57,
+    '}' => 1197,
+    '>' => 25137,
+];
+$illegalValue = 0;
+foreach ($input as $line) {
+    $tmpBuffer = [];
+    foreach ($line as $charPos => $char) {
+        if (in_array($char, array_values($chunkPairs))) {
+            $tmpBuffer[] = $char;
+        }
+        if (in_array($char, array_keys($chunkPairs))) {
+            $lastBufferItem = array_pop($tmpBuffer);
+            if ($chunkPairs[$char] !== $lastBufferItem) {
+                $illegalValue += $illegalValues[$char];
+                continue 2;
+            }
+        }
+    }
+}
+echo $illegalValue; //366027