C pointers by example: Advent of Code 2021 Day 1 Sonar Sweep

[MartinClausen]

I will be using Clojure for AoC this year. I think both seeing AoC 22 solve in C would be very interesting.

[dukereg]

I solved it in k for fun. The solution is:
+/>':
read literally as "add fold more each-prior", but in context as something like "sum where each more than prior".

Edit: after talking to k enthusiasts online, I have a nicer solution using the "stencil" overload of ': with the more natural < folded across 2-width windows of the input, as follows:
+/2(</)':
It has 4 characters of boilerplate but it is much easier to reason about the operation itself IMO.

[joshuacottrell]

My vote would be for Clojure though I'll watch them either way!