Not sure if people are cheating. However, many puzzles can be solved in a very short time. If you want, just take a look at my step-by-step tutorial series for Advent of Code. In the end, you'll always find the full solution. Most of those have very few lines and they could be even shorter. Often, I'll write a bit more so that it's easier to explain :)
Something I'd like to add: It also comes down to experience. I often notice certain patterns and know exactly what I'll code to solve this puzzle in a very short time. I assume that highly competitive developers are even more "trained" in spotting patterns or at least finding a way to be fast.
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Not sure if people are cheating. However, many puzzles can be solved in a very short time. If you want, just take a look at my step-by-step tutorial series for Advent of Code. In the end, you'll always find the full solution. Most of those have very few lines and they could be even shorter. Often, I'll write a bit more so that it's easier to explain :)
[Advent of Code 2020] Day 1 Step-by-Step Tutorial (TypeScript)
Kai ・ Dec 5 ・ 3 min read
Something I'd like to add: It also comes down to experience. I often notice certain patterns and know exactly what I'll code to solve this puzzle in a very short time. I assume that highly competitive developers are even more "trained" in spotting patterns or at least finding a way to be fast.