this post was submitted on 15 Nov 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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https://adventofcode.com/2021/day/6
This was my first real attempt at a harder puzzle. I was just finishing my springboot course and, of course, fell for the exponential growth trap. Only I didn't realize exponential growth was the problem. So, I set up a database and a springboot application, like I had just learned. I believe I did get a result, but it took about 10 hours or so.
Good times!
Eventually this puzzle became the pitch how I got my current job.
what is that?
An X^n operation. A funtion that requires more calculations as it's input grows. Google for "Big O notation". The ideal is a Big O of 1, which means that regardless of the input, the funtion takes the same time to run. This a print statement for example.
This puzzle was designed so that the first part is relatively easy to solve, but the second part has bigger input where the exponential growth kicks in and it becomes computationally unsolvable. So you have to rewrite the function and group the input in a different way to avoid make the funtcion run in N^2 time instead of X^n (which is faster and requires less resources)
So, what you're saying is not to iterate thru every fish, but group the fish in 9 groups depending on age, meaning it will only make 9 tests no matter if there are 1 or 3billion fish?