this post was submitted on 11 Dec 2023
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Advent Of Code
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An unofficial home for the advent of code community on programming.dev!
Advent of Code is an annual Advent calendar of small programming puzzles for a variety of skill sets and skill levels that can be solved in any programming language you like.
AoC 2023
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console.log('Hello World')
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Man this one frustrated me because of a subtle difference in the wording of part 1 vs part 2. I had the correct logic from the start, but with an off-by-one error because of my interpretation of the wording. Part 1 says, "any rows or columns that contain no galaxies should all actually be twice as big" while part 2 says, "each empty column should be replaced with
1000000
empty columns".I added 1 column/row in part
1
, and1_000_000
in part 2. But if you're replacing an empty column with1_000_000
, you're actually adding999_999
columns. It took me a good hour to discover where that off-by-one error was coming from.Yepp, this one got me as well! I found the discrepancy when testing against the sample through, which showed the result for a factor 100 (which needed to be 99). Knowing the correct outcome made debugging a lot easier.
I always make sure my solution passes all the samples before trying the full input.
Me too. I ran all the samples, and I was still banging my head. I can usually see the mistake if it's an off-by-one error in a calculation, but this was a mistake in reading the problem description, so I couldn't see it at first.
Yeah the descriptions contain a lot of story fluff, but also critical bits of information.