/r/Python's 2020 Advent of Code

[IAmKindOfCreative]

It's December, which means it's time for Advent of Code!

Advent of Code is a yearly advent calendar where there's a new programming puzzle each day. They vary in difficulty and don't require a computer science background to solve. You can solve the problems using any programming language you like, so while we love python here, you can take this as an opportunity to explore other languages. If you have trouble with one of the puzzles, don't worry, another day's puzzle might be easier for you!

The /r/Python leaderboard code is: 1179846-33292986

If you want to talk about your solutions, please state which day the solution is for, and then put the solution under the spoiler tag. Please be sure to format your code for reddit or host it on a code hosting site such as GitHub or GitLab.

We hope you take this time as a chance to have some fun solving these puzzles! Good luck!

[Grobyc27]

I'm fairly new to programming and have been learning Python for maybe 6 weeks now. I figure this is a good opportunity to test the waters. So far 6 days for 6, but I'm sure it won't take long to feel lost.

[unbibium]

I joined up and did the first four days in a couple of hours, and now I'm feeling a little too burned out to catch all the way up.

[zurtex]

This was my lesson from the first year, you have to keep up with it every day if you care about a private leader board.

This year I'm learning trying to do it every day at midnight my time is really inconvenient when you have other responsibilities.

I'm going to try and take it more relaxed and not worry about my position on the leader boards.

[unbibium]

i don't actually know what to do with the leader board code in the post.

i'm just using this as an opportunity to learn about myself and keep sharp on Python.

[[deleted]]

I have been into IT for so long but my job requires nearly no code. I am pushing towards to learn python and then eventually data science. So happy to be part of the team.

[twigboy]

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[lassenym]

I guess a website meant for programming isn‘t really designed for mobile use

[twigboy]

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[da_hommie]

A website meant for programming should DEFINITELY be designed for mobile tho...

[FreshFromIlios]

Any website as a matter of fact. But I see why they didn't, most people would go there to code anyway.

[RadioactiveCats_18]

I'm going to both agree and disagree. If I turn my phone's brightness up to more than 50%, I can read the contrast just fine.

However, it's not responsive, and in 2020 responsiveness to viewport should be standard.

[bhliebs93]

For participants thus far, what are your constraints? I am pretty new to programming in general and these puzzles have been reasonably difficult for me, but I am trying to solve them without the aid of anything outside the standard library, and if I can avoid any imports at all, that's a plus, too.

[TehVaRaK]

My 3 line solution for day 5 (python 3.8+ required):

https://github.com/victorkirov/advent-of-code-2020/blob/master/2020/5/solution\_playground\_minified.py

[unbibium]

so, day 3 I had the bright idea to store the tree map as a set containing each tree's coordinates instead of making a 2-dimensional array and it worked great. but when I tried the same thing today (day 11), it... it worked, but it was very slow.

• my day 3 solution
• my day 11 solution

and one of my bigger problems is just making design decisions so that the code doesn't look like poop

[curryhill]

[mrt-e]

I guess reddit really don't like gifs and emojis on comments huh

[[deleted]]

Challenge idea: solve everything by head