2024.04.2

hsegnitz · hsegnitz · commit a0c24a48f33a · 2024-12-04T07:08:40.000+01:00
diff --git a/php/2024/04/02.php b/php/2024/04/02.php
@@ -0,0 +1,67 @@
+<?php
+
+$start = microtime(true);
+
+
+#$lines = file('example.txt', FILE_IGNORE_NEW_LINES);
+$lines = file('input.txt', FILE_IGNORE_NEW_LINES);
+
+
+$map = [];
+foreach ($lines as $line) {
+    $map[] = str_split($line);
+}
+
+$variants = [
+    [
+        ['find' => 'M', 'col' => -1, 'row' => -1],
+        ['find' => 'M', 'col' => -1, 'row' =>  1],
+        ['find' => 'S', 'col' =>  1, 'row' => -1],
+        ['find' => 'S', 'col' =>  1, 'row' =>  1],
+    ],
+    [
+        ['find' => 'M', 'col' => -1, 'row' => -1],
+        ['find' => 'S', 'col' => -1, 'row' =>  1],
+        ['find' => 'M', 'col' =>  1, 'row' => -1],
+        ['find' => 'S', 'col' =>  1, 'row' =>  1],
+    ],
+    [
+        ['find' => 'S', 'col' => -1, 'row' => -1],
+        ['find' => 'S', 'col' => -1, 'row' =>  1],
+        ['find' => 'M', 'col' =>  1, 'row' => -1],
+        ['find' => 'M', 'col' =>  1, 'row' =>  1],
+    ],
+    [
+        ['find' => 'S', 'col' => -1, 'row' => -1],
+        ['find' => 'M', 'col' => -1, 'row' =>  1],
+        ['find' => 'S', 'col' =>  1, 'row' => -1],
+        ['find' => 'M', 'col' =>  1, 'row' =>  1],
+    ],
+];
+
+
+$count = 0;
+foreach ($map as $rowNum => $row) {
+    foreach ($row as $colNum => $char) {
+        if ('A' !== $char) {
+            continue;
+        }
+        foreach ($variants as $variant) {
+            foreach ($variant as $target) {
+                $searchCol = $colNum + $target['col'];
+                $searchRow = $rowNum + $target['row'];
+                if (!isset($map[$searchRow][$searchCol]) || $map[$searchRow][$searchCol] !== $target['find']) {
+                    continue 2;
+                }
+            }
+            ++$count;
+            break;
+        }
+    }
+}
+
+
+echo $count, "\n";
+
+echo microtime(true) - $start;
+echo "\n";
