From 46b650a808195b28da72a24e8507c664a15dba7e Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Cl=C3=A9ment?= <clement@desmidt.fr>
Date: Tue, 8 Dec 2020 16:38:19 +0100
Subject: [PATCH] :sparkles: Finit le jour 6

---
 day_6/part_1.php | 12 ++++++++++++
 day_6/part_2.php | 21 +++++++++++++++++++++
 2 files changed, 33 insertions(+)
 create mode 100644 day_6/part_1.php
 create mode 100644 day_6/part_2.php

diff --git a/day_6/part_1.php b/day_6/part_1.php
new file mode 100644
index 0000000..ddfb180
--- /dev/null
+++ b/day_6/part_1.php
@@ -0,0 +1,12 @@
+<?php
+
+$groups = explode("\n\n", file_get_contents('input.txt'));
+
+$yesses = 0;
+
+foreach ($groups as $group) {
+    $group_yes = implode('', explode("\n", $group));
+    $yesses += count(array_unique(str_split($group_yes)));
+}
+
+echo $yesses;
\ No newline at end of file
diff --git a/day_6/part_2.php b/day_6/part_2.php
new file mode 100644
index 0000000..46ddc0d
--- /dev/null
+++ b/day_6/part_2.php
@@ -0,0 +1,21 @@
+<?php
+
+$groups = explode("\n\n", file_get_contents('input.txt'));
+
+$yesses = 0;
+
+foreach ($groups as $group) {
+    $persons = explode("\n", $group);
+    if (count($persons) === 1) {
+        $yesses += strlen(current(array_unique($persons)));
+    } else {
+        $persons_letters = array_map(static function($person) {
+            return array_unique(str_split($person));
+        }, $persons);
+
+        $intersect = array_intersect(...$persons_letters);
+        $yesses += count($intersect);
+    }
+}
+
+echo $yesses;
\ No newline at end of file