✨ Ajoute le jour 14

day_14/part_1.php

@@ -0,0 +1,30 @@
+<?php
+
+[$template, $rules] = explode("\n\n", file_get_contents('./input.txt'));
+
+$template = str_split($template);
+
+$pair_insertion_rules = [];
+foreach (explode("\n", $rules) as $rule) {
+    [$key, $value] = explode(' -> ', $rule);
+    $pair_insertion_rules[$key] = $value;
+}
+
+for ($i = 0; $i < 40; $i++) {
+    $tmp = [];
+    foreach ($template as $i_char => $char) {
+        if (array_key_exists($i_char+1, $template)) {
+            $tmp[] = $char;
+            $pair = $char . $template[$i_char + 1];
+            if (array_key_exists($pair, $pair_insertion_rules)) {
+                $tmp[] = $pair_insertion_rules[$pair];
+            }
+        }
+    }
+    $tmp[] = array_pop($template);
+    $template = $tmp;
+    echo $i."\n";
+}
+
+$count_char = array_count_values($template);
+echo max($count_char) - min($count_char);