This problem has only Japanese editorials and Youtube videos.

People in mainland China are not allowed to visit youtube (VPN or similar is illegal) and I'm not studying Japanese (the translation is terrible), so can anyone translate or just post the written editorial here?

I'm a student studying German and I'm interested about CP in Germany.

If you're from Germany, Austria or Switzerland, how's CP there and how the government (or any national organization) is maintaining it? Write what you know pls :)

Hi, everyone!

I've just checked my rating graph and saw this.

Is it a normal codeforces bug or a browser bug or else?

Also, I found other rating graphs strange (someone taking part in a contest recently but had its rating graph updated until last year).

Many people may be worried about homework when participating in CF contests on weekdays, and Chinese users don't have a chance to compete. So, I think it is better to set the time of the contests to weekends.

Jerrlee was my classmate and he is struggling with Atcoder ABC C-D Problems. However, in last contest, he amazingly made to the 94-th! What's he doing and most importantly, is he cheating?

It's normal people won't like this, but I'm so confused that a person like this will do such a performance.