Advent of Code F# – Day 12

Check out my new course Learn you some Lambda best practice for great good! and learn the best practices for performance, cost, security, resilience, observability and scalability.

ps. look out for all my other solutions for Advent of Code challenges here.

 

Day 12

See details of the challenge here.

The input for today’s challenge looks like this:

cpy 1 a
cpy 1 b
cpy 26 d
jnz c 2
jnz 1 5
cpy 7 c

This is very similar to Day 23 of Advent of Code 2015 and looking at my solution then I thought I could simplify it slightly this time around.

 

Part 2

As you head down the fire escape to the monorail, you notice it didn’t start;
register c needs to be initialized to the position of the ignition key.

If you instead initialize register c to be 1, what value is now left in register a?

because of the work we did in part 1, part 2 is a simple one liner:

let part2 = (execute [ “c”, 1 ] inputs).[“a”]

 

Links

Liked this article? Support me on Patreon and get direct help from me via a private Slack channel or 1-2-1 mentoring.
Subscribe to my newsletter


Hi, I’m Yan. I’m an AWS Serverless Hero and the author of Production-Ready Serverless.

I specialise in rapidly transitioning teams to serverless and building production-ready services on AWS.

Are you struggling with serverless or need guidance on best practices? Do you want someone to review your architecture and help you avoid costly mistakes down the line? Whatever the case, I’m here to help.

Hire me.


Check out my new course, Learn you some Lambda best practice for great good! In this course, you will learn best practices for working with AWS Lambda in terms of performance, cost, security, scalability, resilience and observability. We will also cover latest features from re:Invent 2019 such as Provisioned Concurrency – what it is and when you should use them. Enrol now and start learning!

Start Learning


Are you working with Serverless and looking for expert training to level-up your skills? Or are you looking for a solid foundation to start from? Look no further, register for my Production-Ready Serverless workshop to learn how to build production-grade Serverless applications!

Find a workshop near you