Hello everyone!
I'd like to introduce you a new Codeforces (and AtCoder) tool developed by me and my brother. This tool compares accepted submissions between two users, but with a little twist, you can filter the problem by rating and/or tags. In my opinion, the filter feature is very useful because sometimes we don't want to solve too easy problems that our rival has solved. This tool can be accessed here: https://boiling-tundra-04466.herokuapp.com/
I'd like to credit some people without whom this tool can't be build:
- Codeforces team for providing the Codeforces API
- https://github.com/kenkoooo/AtCoderProblems/blob/master/doc/api.md for providing AtCoder API
Codes for this tool can be accessed here:
- Front-end: https://github.com/teddypiter/code-compare
- Back-end: https://github.com/alvinpiter/cp-helper
Pull requests, feature requests, or bug reports are welcome. Have a nice day!
Example: I'd like to know which problems Yehezkiel has solved but I haven't and those problems' rating must be between 1900 and 2000, and their tags must include data structures AND binary search. 
