From 44837f967215e4c08741d6e3d4112237b7752bdc Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Cl=C3=A9ment?= <clement@desmidt.fr>
Date: Thu, 3 Dec 2020 12:27:30 +0100
Subject: [PATCH] :sparkles: Finit le 1er jour

---
 day_1/part_1.php | 11 +++++++++++
 day_1/part_2.php | 22 ++++++++++++++++++++++
 2 files changed, 33 insertions(+)
 create mode 100644 day_1/part_1.php
 create mode 100644 day_1/part_2.php

diff --git a/day_1/part_1.php b/day_1/part_1.php
new file mode 100644
index 0000000..17b8d6a
--- /dev/null
+++ b/day_1/part_1.php
@@ -0,0 +1,11 @@
+<?php
+
+$numbers = array_map('intval', explode("\n", file_get_contents('input.txt')));
+
+foreach ($numbers as $number) {
+    $number_to_2020 = 2020 - $number;
+    if (in_array($number_to_2020, $numbers, true)) {
+        echo $number_to_2020 * $number;
+        exit;
+    }
+}
\ No newline at end of file
diff --git a/day_1/part_2.php b/day_1/part_2.php
new file mode 100644
index 0000000..ecbdd88
--- /dev/null
+++ b/day_1/part_2.php
@@ -0,0 +1,22 @@
+<?php
+
+$numbers = array_map('intval', explode("\n", file_get_contents('input.txt')));
+
+foreach ($numbers as $i => $number_1) {
+    foreach ($numbers as $j => $number_2) {
+        if ($j <= $i) {
+            continue;
+        }
+
+        if ($number_1 + $number_2 >= 2020) {
+            continue;
+        }
+
+        $number_to_2020 = 2020 - $number_1 - $number_2;
+
+        if (in_array($number_to_2020, $numbers, true)) {
+            echo $number_to_2020 * $number_1 * $number_2;
+            exit;
+        }
+    }
+}
\ No newline at end of file