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added day14 part2 prompt

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Alex Chao
2020-08-04 16:17:08 -04:00
parent 1b84060b80
commit bcbe60834c
2 changed files with 24 additions and 1 deletions
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README.md
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@@ -20,3 +20,4 @@ Day | Name | Type of Algo & Notes
12 | The N-Body Problem | I like to call this a _(harmonic) frequency_ algo. Finding the harmonic frequency of multiple bodies/items and then finding the Least Common Multiple of those frequencies will tell you when all the bodies have returned to their initial state. <br> - I've used this approach for a leetcode problem about prisoners in jail cells too
13 | Care Package | Intcode again! It's basically every other day... <br> - part1: 2D array manipulation again <br> - part2: holy algo, some logic to basically play Bricks game. <br> - This is more of a design question for how you manage state
14 | Space Stoichiometry | __Weighted Graph and Breadth First Traversals__ <br> - Because not all of the products have a quantity of 1, it complicates the graph's data model. I ended up mapping the product/chemical name to a map of its stoichiometry where the product's number is positive & reactants were negative. <br> - part2: not just a simple division because of "extra byproducts" of generating each piece of fuel. I just let this brute force thing run for ~30 seconds...
15 | Oxygen System | YAY INTCODE 🙄 <br>
day14/prompt.txt
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@@ -82,3 +82,25 @@ Here are some larger examples:
7 XCVML => 6 RJRHP
5 BHXH, 4 VRPVC => 5 LTCX
Given the list of reactions in your puzzle input, what is the minimum amount of ORE required to produce exactly 1 FUEL?
Your puzzle answer was 1185296.
--- Part Two ---
After collecting ORE for a while, you check your cargo hold: 1 trillion (1000000000000) units of ORE.
With that much ore, given the examples above:
The 13312 ORE-per-FUEL example could produce 82892753 FUEL.
The 180697 ORE-per-FUEL example could produce 5586022 FUEL.
The 2210736 ORE-per-FUEL example could produce 460664 FUEL.
Given 1 trillion ORE, what is the maximum amount of FUEL you can produce?
Your puzzle answer was 1376631.
Both parts of this puzzle are complete! They provide two gold stars: **
At this point, you should return to your Advent calendar and try another puzzle.
If you still want to see it, you can get your puzzle input.
You can also [Share] this puzzle.