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| <!DOCTYPE html> | ||
| <html lang="en-us"> | ||
| <head> | ||
| <meta charset="utf-8" /> | ||
| <title>Day 2 - Advent of Code 2023</title> | ||
| <link href='https://fonts.googleapis.com/css?family=Source+Code+Pro:300&subset=latin,latin-ext' rel='stylesheet' | ||
| type='text/css'> | ||
| <link rel="stylesheet" type="text/css" href="../static/style.css" /> | ||
| <link rel="stylesheet alternate" type="text/css" href="../static/highcontrast.css" title="High Contrast" /> | ||
| <link rel="shortcut icon" href="../static/favicon.png" /> | ||
| </head> | ||
| <body> | ||
| <header> | ||
| <div> | ||
| <h1 class="title-global"><a href="index.html">Advent of Code</a></h1> | ||
| <nav> | ||
| <ul> | ||
| <li><a href="events.html">[Events]</a></li> | ||
| <li><a href="leaderboard.html">[Leaderboard]</a></li> | ||
| <li><a href="solver.html">[Solver]</a></li> | ||
| </ul> | ||
| </nav> | ||
| <div class="user">Shahar Talmi <a class="supporter-badge" title="Advent of Code Supporter">(AoC++)</a> <a | ||
| href="https://www.wix.engineering/" target="_blank" class="sponsor-badge" | ||
| title="Member of sponsor: Wix Engineering">(Sponsor)</a> <span class="star-count">50*</span></div> | ||
| </div> | ||
| <div> | ||
| <h1 class="title-event"> <span class="title-event-wrap">$year=</span><a | ||
| href="index.html">2023</a><span class="title-event-wrap">;</span></h1> | ||
| </div> | ||
| </header> | ||
| <main> | ||
| <article class="day-desc"><h2>--- Day 2: Cube Conundrum ---</h2><p>You're launched high into the atmosphere! The apex of your trajectory just barely reaches the surface of a large island floating in the sky. You gently land in a fluffy pile of leaves. It's quite cold, but you don't see much snow. An Elf runs over to greet you.</p> | ||
| <p>The Elf explains that you've arrived at <em>Snow Island</em> and apologizes for the lack of snow. He'll be happy to explain the situation, but it's a bit of a walk, so you have some time. They don't get many visitors up here; <span title="No, the Elf's name is not 'WOPR'. It's Joshua.">would you like to play a game</span> in the meantime?</p> | ||
| <p>As you walk, the Elf shows you a small bag and some cubes which are either red, green, or blue. Each time you play this game, he will hide a secret number of cubes of each color in the bag, and your goal is to figure out information about the number of cubes.</p> | ||
| <p>To get information, once a bag has been loaded with cubes, the Elf will reach into the bag, grab a handful of random cubes, show them to you, and then put them back in the bag. He'll do this a few times per game.</p> | ||
| <p>You play several games and record the information from each game (your puzzle input). Each game is listed with its ID number (like the <code>11</code> in <code>Game 11: ...</code>) followed by a semicolon-separated list of subsets of cubes that were revealed from the bag (like <code>3 red, 5 green, 4 blue</code>).</p> | ||
| <p>For example, the record of a few games might look like this:</p> | ||
| <pre><code>Game 1: 3 blue, 4 red; 1 red, 2 green, 6 blue; 2 green | ||
| Game 2: 1 blue, 2 green; 3 green, 4 blue, 1 red; 1 green, 1 blue | ||
| Game 3: 8 green, 6 blue, 20 red; 5 blue, 4 red, 13 green; 5 green, 1 red | ||
| Game 4: 1 green, 3 red, 6 blue; 3 green, 6 red; 3 green, 15 blue, 14 red | ||
| Game 5: 6 red, 1 blue, 3 green; 2 blue, 1 red, 2 green | ||
| </code></pre> | ||
| <p>In game 1, three sets of cubes are revealed from the bag (and then put back again). The first set is 3 blue cubes and 4 red cubes; the second set is 1 red cube, 2 green cubes, and 6 blue cubes; the third set is only 2 green cubes.</p> | ||
| <p>The Elf would first like to know which games would have been possible if the bag contained <em>only 12 red cubes, 13 green cubes, and 14 blue cubes</em>?</p> | ||
| <p>In the example above, games 1, 2, and 5 would have been <em>possible</em> if the bag had been loaded with that configuration. However, game 3 would have been <em>impossible</em> because at one point the Elf showed you 20 red cubes at once; similarly, game 4 would also have been <em>impossible</em> because the Elf showed you 15 blue cubes at once. If you add up the IDs of the games that would have been possible, you get <code><em>8</em></code>.</p> | ||
| <p>Determine which games would have been possible if the bag had been loaded with only 12 red cubes, 13 green cubes, and 14 blue cubes. <em>What is the sum of the IDs of those games?</em></p> | ||
| </article> | ||
| <p>Your puzzle answer was <code>2593</code>.</p><article class="day-desc"><h2 id="part2">--- Part Two ---</h2><p>The Elf says they've stopped producing snow because they aren't getting any <em>water</em>! He isn't sure why the water stopped; however, he can show you how to get to the water source to check it out for yourself. It's just up ahead!</p> | ||
| <p>As you continue your walk, the Elf poses a second question: in each game you played, what is the <em>fewest number of cubes of each color</em> that could have been in the bag to make the game possible?</p> | ||
| <p>Again consider the example games from earlier:</p> | ||
| <pre><code>Game 1: 3 blue, 4 red; 1 red, 2 green, 6 blue; 2 green | ||
| Game 2: 1 blue, 2 green; 3 green, 4 blue, 1 red; 1 green, 1 blue | ||
| Game 3: 8 green, 6 blue, 20 red; 5 blue, 4 red, 13 green; 5 green, 1 red | ||
| Game 4: 1 green, 3 red, 6 blue; 3 green, 6 red; 3 green, 15 blue, 14 red | ||
| Game 5: 6 red, 1 blue, 3 green; 2 blue, 1 red, 2 green | ||
| </code></pre> | ||
| <ul> | ||
| <li>In game 1, the game could have been played with as few as 4 red, 2 green, and 6 blue cubes. If any color had even one fewer cube, the game would have been impossible.</li> | ||
| <li>Game 2 could have been played with a minimum of 1 red, 3 green, and 4 blue cubes.<li> | ||
| <li>Game 3 must have been played with at least 20 red, 13 green, and 6 blue cubes.</li> | ||
| <li>Game 4 required at least 14 red, 3 green, and 15 blue cubes.</li> | ||
| <li>Game 5 needed no fewer than 6 red, 3 green, and 2 blue cubes in the bag.</li> | ||
| </ul> | ||
| <p>The <em>power</em> of a set of cubes is equal to the numbers of red, green, and blue cubes multiplied together. The power of the minimum set of cubes in game 1 is <code>48</code>. In games 2-5 it was <code>12</code>, <code>1560</code>, <code>630</code>, and <code>36</code>, respectively. Adding up these five powers produces the sum <code><em>2286</em></code>.</p> | ||
| <p>For each game, find the minimum set of cubes that must have been present. <em>What is the sum of the power of these sets?</em></p> | ||
| </article> | ||
| <p>Your puzzle answer was <code>54699</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="index.html">return to your Advent calendar</a> and try another puzzle.</p> | ||
| <p>If you still want to see it, you can <a href="day02.txt" 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+%22Cube+Conundrum%22+%2D+Day+2+%2D+Advent+of+Code+2023&url=https%3A%2F%2Fadventofcode%2Ecom%2F2023%2Fday%2F2&related=ericwastl&hashtags=AdventOfCode" target="_blank">Twitter</a> | ||
| <a href="javascript:void(0);" onclick="var ms; try{ms=localStorage.getItem('mastodon.server')}finally{} if(typeof ms!=='string')ms=''; ms=prompt('Mastodon Server?',ms); if(typeof ms==='string' && ms.length){this.href='https://'+ms+'/share?text=I%27ve+completed+%22Cube+Conundrum%22+%2D+Day+2+%2D+Advent+of+Code+2023+%23AdventOfCode+https%3A%2F%2Fadventofcode%2Ecom%2F2023%2Fday%2F2';try{localStorage.setItem('mastodon.server',ms);}finally{}}else{return false;}" target="_blank">Mastodon</a | ||
| ></span>]</span> this puzzle.</p> | ||
| </main> | ||
| </body> | ||
| </html> |
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