These inputs were were independently randomly generated with the goal of creating a pool of "admissible" extra inputs for Advent of Code 2023.
For an input to be included here, N of M different implementations needed to agree on the solutions. While these inputs might not be exactly like the official ones (I'd have no way of generating "real" inputs not having access to the real code), they should be acceptable according to the problem specifications.
For days whose inputs required special properties, those special properties have been (mostly) replicated here.
The generator is here.
This problem, because it involves floating point, is likely to have the most variance between computed solutions and real solutions. For the most part, the selected inputs were nice enough to be solved by LU/QR decomp, as well as with sympy for python.