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day06.html
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<!DOCTYPE html>
<html lang="en-us">
<head>
<title>2020\day06.nim</title>
<link rel="icon" href="data:image/svg+xml,<svg xmlns=%22http://www.w3.org/2000/svg%22 viewBox=%220 0 100 100%22><text y=%22.9em%22 font-size=%2280%22>🐳</text></svg>">
<meta content="text/html; charset=utf-8" http-equiv="content-type">
<meta content="width=device-width, initial-scale=1" name="viewport">
<link rel='stylesheet' href='https://unpkg.com/normalize.css/'>
<link rel="stylesheet" href="https://cdn.jsdelivr.net/gh/kognise/water.css@latest/dist/dark.min.css">
<link rel='stylesheet' href='https://cdn.jsdelivr.net/gh/pietroppeter/nimib/assets/androidstudio.css'>
<style>
.nb-box {
display: flex;
align-items: center;
justify-content: space-between;
}
.nb-small {
font-size: 0.8rem;
}
button.nb-small {
float: right;
padding: 2px;
padding-right: 5px;
padding-left: 5px;
}
section#source {
display:none
}
</style>
<script async defer data-domain="pietroppeter.github.io/adventofnim" src="https://plausible.io/js/plausible.js"></script>
<style>
a {
text-decoration: none;
color: #009900;
}
a:hover {
color: #99ff99;
}
em {
color: #ffffff;
font-style: normal;
text-shadow: 0 0 5px #ffffff;
}
em.star {
font-style: normal;
color: #ffff66;
text-shadow: 0 0 5px #ffff66;
}
</style>
</head>
<body>
<header>
<div class="nb-box">
<span><a href="..">🏡</a></span>
<span><code>2020\day06.nim</code></span>
<span><a href="https://github.com/pietroppeter/adventofnim"><svg aria-hidden="true" width="1.2em" height="1.2em" style="vertical-align: middle; fill: #fff" preserveAspectRatio="xMidYMid meet" viewBox="0 0 16 16"><path fill-rule="evenodd" d="M8 0C3.58 0 0 3.58 0 8c0 3.54 2.29 6.53 5.47 7.59.4.07.55-.17.55-.38 0-.19-.01-.82-.01-1.49-2.01.37-2.53-.49-2.69-.94-.09-.23-.48-.94-.82-1.13-.28-.15-.68-.52-.01-.53.63-.01 1.08.58 1.23.82.72 1.21 1.87.87 2.33.66.07-.52.28-.87.51-1.07-1.78-.2-3.64-.89-3.64-3.95 0-.87.31-1.59.82-2.15-.08-.2-.36-1.02.08-2.12 0 0 .67-.21 2.2.82.64-.18 1.32-.27 2-.27.68 0 1.36.09 2 .27 1.53-1.04 2.2-.82 2.2-.82.44 1.1.16 1.92.08 2.12.51.56.82 1.27.82 2.15 0 3.07-1.87 3.75-3.65 3.95.29.25.54.73.54 1.48 0 1.07-.01 1.93-.01 2.2 0 .21.15.46.55.38A8.013 8.013 0 0016 8c0-4.42-3.58-8-8-8z"></path></svg></a></span>
</div>
<hr>
</header><main>
<h1>--- Day 6: Custom Customs ---</h1>
<p>Needed some debugging to clear part2.
I like the fact that I am doing it with standard bitsets and not HashSet.
I did run into issues with carriage return (did not have it in example, have it in input)</p>
<pre><code class="nim hljs"><span class="hljs-keyword">type</span>
<span class="hljs-type">Answer</span> = <span class="hljs-built_in">char</span>
<span class="hljs-type">AnsSet</span> = <span class="hljs-built_in">set</span>[<span class="hljs-built_in">char</span>]
<span class="hljs-keyword">proc</span> solve(text: <span class="hljs-built_in">string</span>): (<span class="hljs-built_in">int</span>, <span class="hljs-built_in">int</span>) =
<span class="hljs-keyword">var</span> text = text & <span class="hljs-string">"</span><span class="hljs-meta">\n</span><span class="hljs-meta">\n</span><span class="hljs-string">"</span>
<span class="hljs-keyword">var</span>
groupAny: <span class="hljs-type">AnsSet</span>
groupEvery: <span class="hljs-type">AnsSet</span>
groupNew = <span class="hljs-literal">true</span>
answers: <span class="hljs-type">AnsSet</span>
answer: <span class="hljs-type">Answer</span>
b: <span class="hljs-built_in">char</span>
<span class="hljs-keyword">for</span> c <span class="hljs-keyword">in</span> text:
<span class="hljs-keyword">if</span> c.isLowerAscii:
answer = c.<span class="hljs-type">Answer</span>
answers.incl(answer)
<span class="hljs-keyword">elif</span> b == <span class="hljs-string">'\n'</span>:
<span class="hljs-literal">result</span>[<span class="hljs-number">0</span>] += groupAny.len
<span class="hljs-literal">result</span>[<span class="hljs-number">1</span>] += groupEvery.len
groupAny = {}.<span class="hljs-type">AnsSet</span>
groupEvery = {}.<span class="hljs-type">AnsSet</span>
groupNew = <span class="hljs-literal">true</span>
<span class="hljs-keyword">elif</span> c == <span class="hljs-string">'\n'</span>:
groupAny.incl(answers)
<span class="hljs-keyword">if</span> groupNew:
groupEvery = answers
groupNew = <span class="hljs-literal">false</span>
<span class="hljs-keyword">else</span>:
groupEvery = groupEvery * answers
answers = {}.<span class="hljs-type">AnsSet</span>
<span class="hljs-keyword">else</span>:
<span class="hljs-keyword">echo</span> <span class="hljs-string">"ERROR parsing "</span> & c.repr
b = c
<span class="hljs-keyword">echo</span> solve(example)
<span class="hljs-keyword">echo</span> solve(input)</code></pre>
<pre><samp>(11, 6)
(6437, 3229)</samp></pre>
<p>That's the right answer! You are <em class="star">one gold star</em> closer to saving your vacation.</p>
<p>That's the right answer! You are <em class="star">one gold star</em> closer to saving your vacation.</p>
</main>
<footer>
<hr>
<div class="nb-box">
<span><span class="nb-small">made with <a href="https://pietroppeter.github.io/nimib/">nimib 🐳</a></span></span>
<span></span>
<span><button class="nb-small" id="show" onclick="toggleSourceDisplay()">Show Source</button></span>
</div>
</footer>
<section id="source">
<pre><code class="nim hljs"><span class="hljs-keyword">import</span> nimib, animu
<span class="hljs-keyword">let</span>
input = <span class="hljs-string">"2020/input06.txt"</span>.readFile.replace(<span class="hljs-string">"</span><span class="hljs-meta">\c</span><span class="hljs-string">"</span>, <span class="hljs-string">""</span>)
example = <span class="hljs-string">"""abc
a
b
c
ab
ac
a
a
a
a
b"""</span>
<span class="hljs-comment"># I went first with distinct but then incl failed (I needed an `==`)</span>
<span class="hljs-comment"># and I do not need HashSet in the end!</span>
nbInit
nbText: <span class="hljs-string">"# --- Day 6: Custom Customs ---"</span>
nbText: <span class="hljs-string">"""
Needed some debugging to clear part2.
I like the fact that I am doing it with standard bitsets and not HashSet.
I did run into issues with carriage return (did not have it in example, have it in input)
"""</span>
nbCode:
<span class="hljs-keyword">type</span>
<span class="hljs-type">Answer</span> = <span class="hljs-built_in">char</span>
<span class="hljs-type">AnsSet</span> = <span class="hljs-built_in">set</span>[<span class="hljs-built_in">char</span>]
<span class="hljs-keyword">proc</span> solve(text: <span class="hljs-built_in">string</span>): (<span class="hljs-built_in">int</span>, <span class="hljs-built_in">int</span>) =
<span class="hljs-keyword">var</span> text = text & <span class="hljs-string">"</span><span class="hljs-meta">\n</span><span class="hljs-meta">\n</span><span class="hljs-string">"</span>
<span class="hljs-keyword">var</span>
groupAny: <span class="hljs-type">AnsSet</span>
groupEvery: <span class="hljs-type">AnsSet</span>
groupNew = <span class="hljs-literal">true</span>
answers: <span class="hljs-type">AnsSet</span>
answer: <span class="hljs-type">Answer</span>
b: <span class="hljs-built_in">char</span> <span class="hljs-comment"># b is precedent of c</span>
<span class="hljs-keyword">for</span> c <span class="hljs-keyword">in</span> text:
<span class="hljs-keyword">if</span> c.isLowerAscii:
answer = c.<span class="hljs-type">Answer</span>
answers.incl(answer)
<span class="hljs-keyword">elif</span> b == <span class="hljs-string">'\n'</span>:
<span class="hljs-comment">#echo "any: ", groupAny</span>
<span class="hljs-comment">#echo "every: ", groupEvery</span>
<span class="hljs-literal">result</span>[<span class="hljs-number">0</span>] += groupAny.len
<span class="hljs-literal">result</span>[<span class="hljs-number">1</span>] += groupEvery.len
groupAny = {}.<span class="hljs-type">AnsSet</span>
groupEvery = {}.<span class="hljs-type">AnsSet</span>
groupNew = <span class="hljs-literal">true</span>
<span class="hljs-keyword">elif</span> c == <span class="hljs-string">'\n'</span>:
groupAny.incl(answers)
<span class="hljs-keyword">if</span> groupNew:
groupEvery = answers
groupNew = <span class="hljs-literal">false</span>
<span class="hljs-keyword">else</span>:
groupEvery = groupEvery * answers
answers = {}.<span class="hljs-type">AnsSet</span>
<span class="hljs-keyword">else</span>:
<span class="hljs-comment"># thanks to this I find out that input has "\c\n" as line ending</span>
<span class="hljs-keyword">echo</span> <span class="hljs-string">"ERROR parsing "</span> & c.repr
b = c
<span class="hljs-keyword">echo</span> solve(example)
<span class="hljs-keyword">echo</span> solve(input)
gotTheStar
gotTheStar
nbSave
<span class="hljs-comment"># chk solve(example), (11, 6) # this executes twice! bad!</span>
<span class="hljs-comment"># chk solve(input), (6437, 0)</span>
</code></pre>
</section><script>
function toggleSourceDisplay() {
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var source = document.getElementById("source");
if (btn.innerHTML=="Show Source") {
btn.innerHTML = "Hide Source";
source.style.display = "block";
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btn.innerHTML = "Show Source";
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