From be61888c85252a53b843aa81b14db13d5d08d7ed Mon Sep 17 00:00:00 2001
From: Steph <noreply+steph@code.steph.tools>
Date: Thu, 1 Dec 2022 21:02:00 +0100
Subject: [PATCH] =?UTF-8?q?=E2=9C=A8=20Two=20more=20stars=20in=20PHP!?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 2020/9/XMAS.php    |   29 ++
 2020/9/XMASpt2.php |   27 ++
 2020/9/input       | 1000 ++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 1056 insertions(+)
 create mode 100755 2020/9/XMAS.php
 create mode 100755 2020/9/XMASpt2.php
 create mode 100644 2020/9/input

diff --git a/2020/9/XMAS.php b/2020/9/XMAS.php
new file mode 100755
index 0000000..9cd3c3a
--- /dev/null
+++ b/2020/9/XMAS.php
@@ -0,0 +1,29 @@
+#!/usr/bin/env php
+<?php
+
+$length = 25;
+
+$lines = explode("\n", file_get_contents("input"));
+$valid = 0;
+
+for($i=$length; $i<count($lines); $i++) {
+	$ival = $lines[$i];
+
+	for($x=$i-$length; $x<$i; $x++) {
+		$xval = $lines[$x];
+
+		for($y=$i-$length; $y<$x; $y++) {
+			$yval = $lines[$y];
+			if(($xval + $yval) == $ival) {
+				$valid = $i;
+			}
+		}
+	}
+
+	if($valid != $i)
+		break;
+}
+
+echo "First number with bad property is {$lines[$valid + 1]}\n";
+
+?>
diff --git a/2020/9/XMASpt2.php b/2020/9/XMASpt2.php
new file mode 100755
index 0000000..5a6d91f
--- /dev/null
+++ b/2020/9/XMASpt2.php
@@ -0,0 +1,27 @@
+#!/usr/bin/env php
+<?php
+
+$lines = explode("\n", file_get_contents("input"));
+
+$number = 248131121;
+
+$sum = 0;
+$start = 0;
+
+for($i=0; $i<count($lines); $i++) {
+	$sum += intval($lines[$i]);
+
+	while($sum > $number)
+		$sum -= $lines[$start++];
+
+	if($sum === $number)
+		break;
+}
+
+$subset = array_slice($lines, $start, $i - $start);
+sort($subset);
+
+echo "Range starts on $start and ends on $i.\n";
+echo "Lowest {$subset[0]} and highest " . array_pop($subset) . "\n";
+echo "(you can sum them yourself)\n";
+?>
diff --git a/2020/9/input b/2020/9/input
new file mode 100644
index 0000000..300bfe3
--- /dev/null
+++ b/2020/9/input
@@ -0,0 +1,1000 @@
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