See https://adventofcode.com/2023.

This time: Rust.

Some day-specific notes:

• Day 20 part B was awful, requiring making assumptions about the input.
• Day 21 part B was even more awful, not only requiring assumptions about the input, but also more math than code. I can't be arsed to implement this.
• Day 24 part B - no clue how to solve this without a linear algebra solver. That's why this part is implemented in Python, with the use of sympy.