Hi Codeforcers!

I haven't seen yet a problem that gives Time Limit Exceeded when using Python (Pypy) instead of C++. I would like to know if anyone has encountered such kind of problem in the past. I am especially concerned by instances of expert competitors like Egor Kulikov switching from Java to C++ because of performance issues(https://codeforces.net/blog/entry/72415?#comment-566810) but I don't know in practice how often that actually happen.

Thank you all,