Aside from the Art of Problem Solving books mentioned by others, you may find https://web.evanchen.cc/faq-contest.html worth reading. I learnt a lot about math (contests (strategy, experience), undergraduate material,…
An alternative is to just block YouTube recommendations on the client. You can use the 'My Filters' feature of uBlock. See https://github.com/gorhill/uBlock/wiki/Static-filter-syntax for details. Personally, I get along…
Aside from the Art of Problem Solving books mentioned by others, you may find https://web.evanchen.cc/faq-contest.html worth reading. I learnt a lot about math (contests (strategy, experience), undergraduate material,…
An alternative is to just block YouTube recommendations on the client. You can use the 'My Filters' feature of uBlock. See https://github.com/gorhill/uBlock/wiki/Static-filter-syntax for details. Personally, I get along…