✨ Finit les 3e et 4e jours

day_3/part_2.php

@@ -0,0 +1,36 @@
+<?php
+
+$banks = explode("\n", file_get_contents('./input.txt'));
+
+$output_joltage = [];
+
+foreach ($banks as $bank) {
+    $a_bank = str_split($bank);
+    $a_bank_length = count($a_bank);
+    $max_index = $a_bank_length - 12;
+    $min_index = 0;
+
+    $bank_joltage = [];
+
+    while (count($bank_joltage) < 12) {
+        $slice = array_slice($a_bank, 0, $max_index);
+        $max = max($slice);
+        $min_index = array_search($max, $a_bank);
+        $bank_joltage[] = $max;
+
+        array_splice($a_bank, 0, $min_index+1);
+        if (count($a_bank) + count($bank_joltage) === 12) {
+            $bank_joltage = array_merge($bank_joltage, $a_bank);
+        }
+        $a_bank_length = count($a_bank);
+        $max_index = $a_bank_length - 11 + count($bank_joltage);
+
+    }
+
+    $largest_voltage = (int)implode('', $bank_joltage);
+    $output_joltage[] = $largest_voltage;
+    echo $largest_voltage . "\n";
+
+}
+
+echo array_sum($output_joltage);