Add puzzle text and input for 2022 Day 8-25

2022/day_18/puzzle_text.md

@@ -1 +1,23 @@
-# Day 18 Puzzle Text.
+
+<article class="day-desc"><h2>--- Day 18: Boiling Boulders ---</h2><p>You and the elephants finally reach fresh air. You've emerged near the base of a large volcano that seems to be actively erupting! Fortunately, the lava seems to be flowing away from you and toward the ocean.</p>
+<p>Bits of lava are still being ejected toward you, so you're sheltering in the cavern exit a little longer. Outside the cave, you can see the lava landing in a pond and hear it loudly hissing as it solidifies.</p>
+<p>Depending on the specific compounds in the lava and speed at which it cools, it might be forming <a href="https://en.wikipedia.org/wiki/Obsidian" target="_blank">obsidian</a>! The cooling rate should be based on the surface area of the lava droplets, so you take a quick scan of a droplet as it flies past you (your puzzle input).</p>
+<p>Because of how quickly the lava is moving, the scan isn't very good; its resolution is quite low and, as a result, it approximates the shape of the lava droplet with <em>1x1x1 <span title="Unfortunately, you forgot your flint and steel in another dimension.">cubes</span> on a 3D grid</em>, each given as its <code>x,y,z</code> position.</p>
+<p>To approximate the surface area, count the number of sides of each cube that are not immediately connected to another cube. So, if your scan were only two adjacent cubes like <code>1,1,1</code> and <code>2,1,1</code>, each cube would have a single side covered and five sides exposed, a total surface area of <code><em>10</em></code> sides.</p>
+<p>Here's a larger example:</p>
+<pre><code>2,2,2
+1,2,2
+3,2,2
+2,1,2
+2,3,2
+2,2,1
+2,2,3
+2,2,4
+2,2,6
+1,2,5
+3,2,5
+2,1,5
+2,3,5
+</code></pre>
+<p>In the above example, after counting up all the sides that aren't connected to another cube, the total surface area is <code><em>64</em></code>.</p>
+<p><em>What is the surface area of your scanned lava droplet?</em></p>