I'm currently live discussing the problems. I will add problemwise timestamp after the discussion stream, and also format the blog properly.
You can join in if something in this blog is unclear or you have more questions.
My submission — 285842091
2025B - Binomial Coefficients, Kind Of
My submission — 285848201
My submission — 285852480
My submission — 285868260
My submission — 285892958
My submission — 285887128