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<!DOCTYPE html>
<html lang="en-us">
<head>
<meta charset="utf-8"/>
<title>Day 12 - Advent of Code 2015</title>
<link rel="stylesheet" type="text/css" href="/static/style.css?31"/>
<link rel="stylesheet alternate" type="text/css" href="/static/highcontrast.css?1" title="High Contrast"/>
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<script>window.addEventListener('click', function(e,s,r){if(e.target.nodeName==='CODE'&&e.detail===3){s=window.getSelection();s.removeAllRanges();r=document.createRange();r.selectNodeContents(e.target);s.addRange(r);}});</script>
</head><!--
Oh, hello! Funny seeing you here.
I appreciate your enthusiasm, but you aren't going to find much down here.
There certainly aren't clues to any of the puzzles. The best surprises don't
even appear in the source until you unlock them for real.
Please be careful with automated requests; I'm not a massive company, and I can
only take so much traffic. Please be considerate so that everyone gets to play.
If you're curious about how Advent of Code works, it's running on some custom
Perl code. Other than a few integrations (auth, analytics, social media), I
built the whole thing myself, including the design, animations, prose, and all
of the puzzles.
The puzzles are most of the work; preparing a new calendar and a new set of
puzzles each year takes all of my free time for 4-5 months. A lot of effort
went into building this thing - I hope you're enjoying playing it as much as I
enjoyed making it for you!
If you'd like to hang out, I'm @ericwastl@hachyderm.io on Mastodon and
@ericwastl on Twitter.
- Eric Wastl
-->
<body>
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<article class="day-desc"><h2>--- Day 12: JSAbacusFramework.io ---</h2><p>Santa's Accounting-Elves need help balancing the books after a recent order. Unfortunately, their accounting software uses a peculiar storage format. That's where you come in.</p>
<p>They have a <a href="http://json.org/">JSON</a> document which contains a variety of things: arrays (<code>[1,2,3]</code>), objects (<code>{"a":1, "b":2}</code>), numbers, and strings. Your first job is to simply find all of the <em>numbers</em> throughout the document and add them together.</p>
<p>For example:</p>
<ul>
<li><code>[1,2,3]</code> and <code>{"a":2,"b":4}</code> both have a sum of <code>6</code>.</li>
<li><code>[[[3]]]</code> and <code>{"a":{"b":4},"c":-1}</code> both have a sum of <code>3</code>.</li>
<li><code>{"a":[-1,1]}</code> and <code>[-1,{"a":1}]</code> both have a sum of <code>0</code>.</li>
<li><code>[]</code> and <code>{}</code> both have a sum of <code>0</code>.</li>
</ul>
<p>You will not <span title="Nor are you likely to be eaten by a grue... during *this* puzzle, anyway.">encounter</span> any strings containing numbers.</p>
<p>What is the <em>sum of all numbers</em> in the document?</p>
</article>
<p>Your puzzle answer was <code>119433</code>.</p><article class="day-desc"><h2 id="part2">--- Part Two ---</h2><p>Uh oh - the Accounting-Elves have realized that they double-counted everything <em>red</em>.</p>
<p>Ignore any object (and all of its children) which has any property with the value <code>"red"</code>. Do this only for objects (<code>{...}</code>), not arrays (<code>[...]</code>).</p>
<ul>
<li><code>[1,2,3]</code> still has a sum of <code>6</code>.</li>
<li><code>[1,{"c":"red","b":2},3]</code> now has a sum of <code>4</code>, because the middle object is ignored.</li>
<li><code>{"d":"red","e":[1,2,3,4],"f":5}</code> now has a sum of <code>0</code>, because the entire structure is ignored.</li>
<li><code>[1,"red",5]</code> has a sum of <code>6</code>, because <code>"red"</code> in an array has no effect.</li>
</ul>
</article>
<p>Your puzzle answer was <code>68466</code>.</p><p class="day-success">Both parts of this puzzle are complete! They provide two gold stars: **</p>
<p>At this point, you should <a href="/2015">return to your Advent calendar</a> and try another puzzle.</p>
<p>If you still want to see it, you can <a href="12/input" target="_blank">get your puzzle input</a>.</p>
<p>You can also <span class="share">[Share<span class="share-content">on
<a href="https://twitter.com/intent/tweet?text=I%27ve+completed+%22JSAbacusFramework%2Eio%22+%2D+Day+12+%2D+Advent+of+Code+2015&url=https%3A%2F%2Fadventofcode%2Ecom%2F2015%2Fday%2F12&related=ericwastl&hashtags=AdventOfCode" target="_blank">Twitter</a>
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