Coincidently I was wondering a few weeks ago why codeforces was using such an outdated version of Python (https://mirror.codeforces.com/blog/entry/122386) and now Python 3.12.1 is live. As an example of why that would be useful: https://mirror.codeforces.com/contest/356/submission/240013817 is accepted whilst the exact same solution (https://mirror.codeforces.com/contest/356/submission/233016779) was not a few months ago. Probably not the best example since PyPy was able to go through for that particular example but I thought it was worth sharing.