This blog is not related to CP at all

Recently, I found out that some famous games (Clash Royale, Brawl Stars, etc.) were made in C++. For me, segment tree and Mega Knight those games seem to have no connection. So, if you guys know, can you please explain to me how were those game made in C++?

I'm intending to make an interactive problem in polygon, but I don't know how to code an interactor. I read the example interactor of the binary search problem, however, I understand nothing. So can you guys please help me?

I used AI to fix my grammar, so this blog might look like it was written by AI.

So, recently, I participated in a school contest that had pretests. I was quite sure that I was going to get a high rank; however, after the system tests, I was disappointed to discover that I had forgotten to define int long long (and forgot many other stuffs), which ruined the whole thing.

So, how can I get better at handling pretests? I'm not talking about Codeforces rounds, because on Codeforces, the pretests are equal as the system tests.