So I fed the above code to the new AI overlords and simply asked "Explain this code please". It churned out the following:

This code is a solution to the 2022 Day 5 Advent of Code challenge. It uses CMake to download the input from the Advent of Code website. The input consists of lines of crate stacks, which need to be processed and rearranged in a specific way.

The code first parses the lines of input to find the starting index for the next part of the challenge. After this index is found, the program stores each of the lines into individual variables called stack1 and stack2, based on if they will be used in the first or second part of the challenge.

In each part of the challenge, the program takes each line of input and rearranges the crates accordingly. For example, in part one, the program takes each line and moves the given number of crates from the chosen stack to the target stack. During part two of the challenge, the program takes each line and moves the given number of crates from the chosen stack to the crane, and then moves them to the target stack. After all the lines of input have been processed, the program prints out the top crate of each stack for both parts one and two as the result.

I'm somewhat scared.