I really like good blog posts. And that's the main reason I like Codeforces. But as we all know, it's hard to find good blog posts here. So let's help each other and share our favorite posts, which were uploaded to Codeforces in the last year! I will share my top 10, and I encourage you to share some of your favorites in the comments.
An absolutely incredible algorithm which kinda sometimes solves the Hamiltonian path problem on some random and special kind of graphs.
This blog has a purpose that's similar to the purpose of the blog you're reading right now. A great source of interesting blog posts!
Some really interesting algorithms that help multiply 64-bit numbers modulo without int128.
A new awesome resource, that collects all the different achievements of CP-legends.
These are two different posts, but I would like to combine them. This is a really nice collection of materials and implementations of tons of different algorithms and data structures needed for competitive programming.
Some really interesting thoughts from Radewoosh and a really long and engaging discussion in the comments.
The main treasure of this blog post is the comments! So many interesting tricks and tips for C++20.
I never used pragmas because I didn't understand what they're doing. Finally, there is a resource where I can close this gap in my education :)
A really interesting discussion about an algorithm which is around for 5 years but still isn't really understood by the public. I learned a lot from this blog post and after that started researching a lot of things about lambda optimization (a.k.a. Lagrange optimization a.k.a. aliens trick) on my own and figured out that I didn't really understand a thing about it before.
In my opinion, it is the best blog post and the best new data structure of the year. It's absolutely incredible and simple at the same time.
I hope you learned something new today. I'm looking forward to reading your favorite blogs. Merry Christmas and Happy New Year.