Hi all, happy new year!
I recently started developing a new Codeforces Search tool to help search for problems quickly in real-time. This can help for people who want problems for a particular topic (like interval, subarray, permutation, etc).
Right now you can only search by Problem Title, but I intend to add more advanced search functionality (like search by rating, or even search text inside of problems, etc) when I have time.
If interested, please comment below with feature requests and I'll consider adding them -- it'll be more motivating the requested feature can help a lot of people.