Day 14: Parabolic Reflector Dish
Megathread guidelines
- Keep top level comments as only solutions, if you want to say something other than a solution put it in a new post. (replies to comments can be whatever)
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FAQ
- What is this?: Here is a post with a large amount of details: https://programming.dev/post/6637268
- Where do I participate?: https://adventofcode.com/
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C#
Obviously, you can’t calculate 1 billion iterations, so the states must repeat after a while. My solution got to 154 different states and then started looping from state 92 to state 154 (63 steps). From there we can find the index in the state cache that the final state would be, and calculate the supported load from that.
https://code.dinn.ca/stevedinn/AdventOfCode/src/branch/main/2023/day14/Program.cs