My Mathematical Regression

I came across my 10 year old repo for project Euler solutions. (N.B! Euler spoilers onwards). Naturally it&rsquo;s full of python files. One file stood out. It was just called problem15.txt. I pulled up the problem. I imagined getting this at work. I think I would reach for python. Maybe start with a naive brute force. Throw a bunch of loops together. If that didn&rsquo;t solve it, reach for…