3rd and 2nd day

2021-12-03 19:25:51 +01:00
parent 1e900f4642
commit 6365d1fef7
9 changed files with 2103 additions and 2017 deletions
--- a/01/part2.php
+++ b/01/part2.php
@@ -0,0 +1,18 @@
+<?php
+/**
+ *
+ */
+
+$input = file('input', FILE_IGNORE_NEW_LINES | FILE_SKIP_EMPTY_LINES);
+$input = array_map('intval', $input);
+
+$increased       = 0;
+$previousReading = array_sum(array_slice($input, 0, 3));
+for ($i = 1; $i < count($input) - 2; $i++) {
+    $currentReading = array_sum(array_slice($input, $i, 3));
+    if ($currentReading > $previousReading) {
+        $increased++;
+    }
+    $previousReading = $currentReading;
+}
+echo $increased; // 1597