                                           Advent of Code

   br0xen 40*

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--- Day 15: Science for Hungry People ---

   Today, you set out on the task of perfecting your milk-dunking cookie recipe. All you have to
   do is find the right balance of ingredients.

   Your recipe leaves room for exactly 100 teaspoons of ingredients. You make a list of the
   remaining ingredients you could use to finish the recipe (your puzzle input) and their
   properties per teaspoon:

     • capacity (how well it helps the cookie absorb milk)
     • durability (how well it keeps the cookie intact when full of milk)
     • flavor (how tasty it makes the cookie)
     • texture (how it improves the feel of the cookie)
     • calories (how many calories it adds to the cookie)

   You can only measure ingredients in whole-teaspoon amounts accurately, and you have to be
   accurate so you can reproduce your results in the future. The total score of a cookie can be
   found by adding up each of the properties (negative totals become 0) and then multiplying
   together everything except calories.

   For instance, suppose you have these two ingredients:

 Butterscotch: capacity -1, durability -2, flavor 6, texture 3, calories 8
 Cinnamon: capacity 2, durability 3, flavor -2, texture -1, calories 3

   Then, choosing to use 44 teaspoons of butterscotch and 56 teaspoons of cinnamon (because the
   amounts of each ingredient must add up to 100) would result in a cookie with the following
   properties:

     • A capacity of 44*-1 + 56*2 = 68
     • A durability of 44*-2 + 56*3 = 80
     • A flavor of 44*6 + 56*-2 = 152
     • A texture of 44*3 + 56*-1 = 76

   Multiplying these together (68 * 80 * 152 * 76, ignoring calories for now) results in a total
   score of 62842880, which happens to be the best score possible given these ingredients. If any
   properties had produced a negative total, it would have instead become zero, causing the whole
   score to multiply to zero.

   Given the ingredients in your kitchen and their properties, what is the total score of the
   highest-scoring cookie you can make?

   Your puzzle answer was 18965440.

--- Part Two ---

   Your cookie recipe becomes wildly popular! Someone asks if you can make another recipe that has
   exactly 500 calories per cookie (so they can use it as a meal replacement). Keep the rest of
   your award-winning process the same (100 teaspoons, same ingredients, same scoring system).

   For example, given the ingredients above, if you had instead selected 40 teaspoons of
   butterscotch and 60 teaspoons of cinnamon (which still adds to 100), the total calorie count
   would be 40*8 + 60*3 = 500. The total score would go down, though: only 57600000, the best you
   can do in such trying circumstances.

   Given the ingredients in your kitchen and their properties, what is the total score of the
   highest-scoring cookie you can make with a calorie total of 500?

   Your puzzle answer was 15862900.

   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 [Shareon Twitter Google+ Reddit] this puzzle.

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